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EP1480492A2 - Transmission coil system and remote control for a hearing aid - Google Patents

Transmission coil system and remote control for a hearing aid Download PDF

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Publication number
EP1480492A2
EP1480492A2 EP04009708A EP04009708A EP1480492A2 EP 1480492 A2 EP1480492 A2 EP 1480492A2 EP 04009708 A EP04009708 A EP 04009708A EP 04009708 A EP04009708 A EP 04009708A EP 1480492 A2 EP1480492 A2 EP 1480492A2
Authority
EP
European Patent Office
Prior art keywords
coil
transmitter
coils
transmitter coil
coil system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04009708A
Other languages
German (de)
French (fr)
Other versions
EP1480492B1 (en
EP1480492A3 (en
Inventor
Jürgen Reithinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sivantos GmbH
Original Assignee
Siemens Audioligische Technik GmbH
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Publication date
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Publication of EP1480492A2 publication Critical patent/EP1480492A2/en
Publication of EP1480492A3 publication Critical patent/EP1480492A3/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H01F19/02—Audio-frequency transformers or mutual inductances, i.e. not suitable for handling frequencies considerably beyond the audio range
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/554—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired using a wireless connection, e.g. between microphone and amplifier or using Tcoils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/12—Variable inductances or transformers of the signal type discontinuously variable, e.g. tapped
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/51—Aspects of antennas or their circuitry in or for hearing aids
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H04R25/558—Remote control, e.g. of amplification, frequency

Definitions

  • the invention relates to a transmitter coil system with a first and a second transmitter coil and with a coil core and a remote control for a hearing aid with such Transmitting coil system.
  • Transmission systems that are used as carriers e.g. generated by coils Using magnetic fields, data can be transmitted wirelessly short distances, i.e. e.g. over a few decimeters, energy efficient transfer.
  • Such inductive transmission systems work mostly at relatively low frequencies in the range of a few kilohertz to a few hundred kilohertz.
  • the transmission technology of long-wave inductive data transmission is due to the disadvantage of low Range rarely used. This disadvantage is due to the decrease in transmission field energy with the third power of Distance. To bridge somewhat larger distances (1-2m), are already having comparatively strong transmission powers strong fields.
  • a strong field with sufficient field strength can generated by a coil with many turns.
  • a such coils have a correspondingly high inductance and thus a correspondingly high AC resistance on.
  • the maximum current that can be sent through the coil can be obtained from the quotient of the supply voltage and AC resistance.
  • DE 199 15 846 C1 describes a partially implantable system known for the rehabilitation of a hearing impairment that a wireless telemetry device for the transmission of data between an implantable part of the system and an external one Unit.
  • the Coil body made of a stamped part with two end formings consists of a coil winding wound on the bobbin limit laterally.
  • the invention is based on the object of a transmitter coil system and to specify a remote control for a hearing aid, which despite a limited availability Supply voltage a sufficiently high transmission power in particular for data transmission.
  • the first task is with a transmitter coil system a first and a second transmitter coil and with one Solved coil core in that the first transmitter coil with a Excitation unit can be connected, the second transmitter coil as Part of a resonant resonant circuit can be used and the two transmitter coils next to each other on the coil core are wound so that both transmitter coils are loosely magnetically connected to each other are coupled.
  • both transmitter coils are loosely magnetic are coupled together. This is done, for example achieved that between the two transmitter coils a non-winding Space is arranged.
  • the loose coupling leads to one Excitation of the first transmitter coil using, for example alternating operating voltages by the excitation unit a resonantly excessive excitation of the second transmitter coil.
  • both transmitter coils are not of the same Magnetic field flow through, like that with a rigid Coupling is the case where both transmit coils are on top of each other and are not wrapped side by side around the coil core, i.e. the same magnetic field flows through them.
  • the loose coupling results in excitation of the second Transmitter coil with a phase shift that is rocking of the voltage applied to the second transmitter coil. Because of the larger voltage, a higher current flows, which in turn leads to a much higher transmission magnetic field leads. The transmission power is considerably stronger than that in Case of rigid coupling. That is, the coil system works much more effectively.
  • the invention does not make any additional voltage multipliers needs more, or batteries can to be used with less tension or less Batteries can be connected in series. This can also be done Save space or installation space.
  • Another advantage of the possibility of long-wave data transmission by means of the transmitter coil system lies in the problem-free Penetration of matter without noticeably influencing it. Especially when using the transmitter coil system with hearing aids this is vital since is sent in the area of the head and of course no influence of the tissue may take place.
  • the first transmitter coil fewer windings than the second transmitter coil. This enables a low-resistance low-loss, i.e. power-saving, Excitation of the first transmitter coil.
  • the resonantly excitable the second transmitter coil has many turns. Because the magnetic field determined by the sum of the currents in all turns this results in a strong transmission field. Know that second coil has a larger number of turns than the first Transmitter coil is, therefore, the generation of strong transmission fields very efficient.
  • the second transmitter coil forms a capacitor Resonant circuit.
  • the resonant circuit is not too high Goodness, i.e. has a broad quality distribution, which the covers both frequencies used.
  • the first transmitter coil consists of two sub-coils that are symmetrical arranged to the second transmitter coil on the coil core are.
  • the division into two sub-coils, for example with a center tap has the advantage of simpler power supply with fewer components (e.g. only two transistors) and represents a way of making the sub-coils symmetrical to arrange.
  • the symmetrical arrangement has in turn the advantage of a symmetrically radiated field.
  • the coil system is used for sending and receiving, in addition to the transmitter coil (the transmitter coils) Reception coil needed.
  • This receiving coil usually has significantly more turns than the transmitter coils, if possible high voltages when receiving weak magnetic fields to reach.
  • the receiving coil is advantageous to use the receiving coil as second coil to use. Especially if not is sent and received at the same time, but sending and Reception take place sequentially.
  • the use of a film capacitor is advantageous for the resonant circuit used for sending and receiving and its capacity is independent of the applied voltage is. This changes the vibration frequency of the Resonant circuit is not between the high voltages when sending and the low voltages on reception.
  • the invention do not need two independent transmitting or receiving coils two coil cores to be wound. Instead, you can both spools are wound on a single core. Thereby space can be saved. Especially under conditions like they are available with remote controls, is in the kHz frequency range relatively large coils little space.
  • the Saving a core enables a significantly smaller volume of the transmitting (receiving) coil system, or e.g. the remote control.
  • the combination of both Coils on a core are cheaper to manufacture than that Production of two completely separate coils.
  • the Receiver coil Since a receiving coil used as a second transmission coil in the Sending is heavily overloaded, it is advantageous that the Receiver coil to protect against destruction of a receiver coil belonging receiving unit via a protective circuit is connected to the receiving unit.
  • the second task is performed by a remote control for a hearing aid with such a transmitter coil system solved.
  • Figure 1 shows a coil system 1 for a remote control a hearing aid.
  • the excitation frequencies are the used Dual frequency excitation at 116 kHz and 121 kHz.
  • the remote control is operated manually, so that a range of approx. 1-2 m is required to ensure good communication with the To enable hearing aid.
  • the remote control has one handy size on.
  • a battery serves as an energy source, which limits the available voltage.
  • the transmitter coil system 1 has a first transmitter coil 3, one second transmitter coil 5 and a coil core 7.
  • the first Transmitting coil 3 consists of two sub-coils 3A, 3B, for example be formed by tapping the center of a coil.
  • the sub-coils 3A, 3B each have 50 windings and take up approx. 10 mm of the approx. 35 mm long coil core.
  • On the first transmitter coil 3 closes an approximately 5 mm long non-winding space 9.
  • the second transmitter coil 5 On the other side of the non-winding Room 9 is the second transmitter coil 5 a length of approx. 20 mm with a number of windings of approx. 150 Turns.
  • the second transmitter coil forms with one not shown Capacitor of e.g. 2 nF a resonant circuit.
  • the coil core is a ferrite core with a diameter of approx. 6 mm.
  • the partial coils 3A, 3B are wound on one another and over one Center tap can be connected to a transmitter unit.
  • Figure 2 shows a symmetrical arrangement of a transmitter coil system 11, in which the first transmitter coil, which in turn in two sub-coils 13A, 13B is divided, symmetrically on the both ends of the second transmitter coil 15 is arranged. Between the sub-coils 13A, 13B and the second transmission coil 15 there are two non-winding spaces 17A, 17B.
  • the spools are wound around a coil core 19.
  • FIG. 3 shows the course of the voltages on the coils from FIG. 1.
  • the voltage U is plotted over time T over the first 100 microseconds.
  • the voltage value 21, which is applied to the partial coils 3A, 3B, is approximately 3.7 V.
  • the voltage profile U5, which is applied to the second transmitter coil 5, is shown in FIG.
  • the voltage value 23, which has set in after a rise time of 60 ⁇ s, is approximately 80 V. This corresponds to a significantly resonantly excessive voltage at the second transmitter coil 5 by a factor of ten. With rigid coupling there would be a maximum of a factor of three in the gain due to the number of windings.
  • FIG. 4 shows a remote control 100 for a hearing aid based on a schematic circuit diagram.
  • the excitation unit 101 is equipped with one or more transmitter coils 102.
  • the transmission coils are connected to a common core 103
  • the arrangement of the coils 102, 104 corresponds for example the arrangements of Figures 1 or 2.
  • Parallel to the receiving coil 104 is a resonant circuit capacitor 105 connected.
  • a protection circuit consisting of a Protection capacitor 106 and one connected in series Parallel connection of two anti-parallel diodes 107 and 108 connected.
  • the diodes 107 and 108 are connected to the input of a receiving unit 109.
  • the mode of operation of this circuit is described in more detail below explained.
  • the separate receiving coil 104 which is necessary anyway is wound on the same core next to the transmitter coils 102 and is loosely coupled to it. This will make the receiving coil 104, the complete with their associated capacitor 105 Represents resonant circuit 110 by the transmitter coils 102 also stimulated to vibrate. Since the receiving coil 104 in the Compared to the transmitter coils 102 has more turns in the resonantly excited resonant circuit 110 during the transmission process generated relatively high voltages due to the vibration effect of the oscillating circuit 110 despite the many turns again very high currents and thus radiated magnetic fields produce. Deliver the actual transmission coils 102 now only the radiated energy. Therefore needs not as much current to flow through the transmitter coils 102. The strong transmission field is now from that through the transmission coils 102 excited receiving coil 104 generated.
  • the frequency is also absolutely stable and can be specified from the outside. Tolerances of the components in the resonant circuits 110 therefore have no influence on the transmission frequency. They only have a certain effect on efficiency of the sending process.
  • the inductances of the transmission coils 102 change the Inductance of the loosely coupled receiving coil 104 so that the natural frequency of the resonant circuit 110 after changing the associated one Capacitance value of the resonant circuit capacitor 5 needs to be corrected.
  • the inductance of the resonant circuit 110 becomes smaller, i.e. the capacity of the resonant circuit 110 must be increased.
  • a suitable capacity can be used without Problems are interconnected in such a way that they can be used as Protection for the sensitive receiving unit 109 is used. There such a protection circuit 112 is needed anyway this circuit solution without additional components.
  • the Protection circuit 112 consists only of the correction capacitor 106 and the antiparallel connected diodes 107 and 108, the connected in parallel to the capacitor 105 of the resonant circuit 110 are.
  • the received signals are at the diodes 107, 108 tapped.
  • the diodes 107, 108 go into the conductive State and thus switch the upstream Capacitor 106 in parallel with the resonant circuit capacitor 105 of the Reception circuit. So that the resonance frequency of the resonant circuit 110 corrected for broadcasting. simultaneously are the signals at the input of the high impedance receiver limited to a maximum of approximately 0.7 V by the diodes 107, 108. The most of the voltage generated by the resonant circuit 110 then occurs the protective capacitor 106.
  • the reception signals are so small that block the diodes 107, 108.
  • the voltages of the received signals typically reach at most the mV range. Thereby is only the original resonant circuit capacitor 105 active.
  • the transmission coils 102 are switched off. That is, at least one connector of each transmitter coil 102 is open. This affects the resonant circuit 110 no longer out. So it can be based on its reception frequency which he is tuned to swing freely. The signal is thus almost no losses through the protection or correction capacitor 6 further transmitted to the protection diodes 107, 108. Because of the low reception voltage, these are diodes 107, 108 blocked. That the receive voltage can be at the diode connections in full from the high-resistance receiver input be removed.
  • reception coil is used as a transmission amplifier
  • the protective capacitor also serves as a correction capacitor

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • General Health & Medical Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Near-Field Transmission Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Transmitters (AREA)

Abstract

Bei einem Sendespulensystem (1,11) mit einer ersten mit einer Anregeeinheit (101) verbindbaren und einer zweiten als Teil eines resonant anregbaren Schwingkreises (110) verwendbaren Sendespule (3,102,5,15,104) sowie mit einem Spulenkern (7,19) sind beide Sendespulen (3,102,5,15,104) lose magnetisch miteinander gekoppelt, indem beide Sendespulen (3,102,5,15,104) nebeneinander auf den Spulenkern (7,19) gewickelt sind. Eine Anregung der ersten Sendespule (3,102) führt in der zweiten Sendspule (5,15,104) zu einer resonanten Überhöhung der anliegenden Spannung und damit zu einer verstärkten Sendeleistung. Ein solches Sendespulensystem (1,11) kann z.B. zur Fernbedienung eines Hörhilfsgeräts genutzt werden, da es z.B. eine 200Bit/s Datenübertragung über einige Meter bei einer Niedervoltspannungsquelle ermöglicht.

Figure 00000001
Both are in a transmitter coil system (1, 11) with a first transmitter coil (3, 102, 15, 105, 104) that can be connected to an excitation unit (101) and a second transmitter coil that can be used as part of a resonant circuit (110), and with a coil core (7, 19) Transmitter coils (3,102,5,15,104) are loosely magnetically coupled to one another by winding both transmitter coils (3,102,5,15,104) side by side on the coil core (7,19). Excitation of the first transmission coil (3, 102) leads to a resonant increase in the voltage present in the second transmission coil (5, 15, 104) and thus to an increased transmission power. Such a transmitter coil system (1, 11) can be used, for example, for remote control of a hearing aid, since it enables, for example, 200 bit / s data transmission over a few meters with a low-voltage voltage source.
Figure 00000001

Description

Die Erfindung betrifft ein Sendespulensystem mit einer ersten und einer zweiten Sendespule sowie mit einem Spulenkern und eine Fernbedienung für ein Hörhilfsgerät mit einem solchen Sendespulensystem.The invention relates to a transmitter coil system with a first and a second transmitter coil and with a coil core and a remote control for a hearing aid with such Transmitting coil system.

Übertragungssysteme, die als Träger z.B. von Spulen erzeugte magnetische Felder verwenden, können Daten drahtlos über kurze Distanzen, d.h. z.B. über einige Dezimeter, energieeffizient übertragen. Solche induktive Übertragungssysteme arbeiten meist bei relativ niedrigen Frequenzen im Bereich von einigen Kilohertz bis einigen Hundert Kilohertz.Transmission systems that are used as carriers e.g. generated by coils Using magnetic fields, data can be transmitted wirelessly short distances, i.e. e.g. over a few decimeters, energy efficient transfer. Such inductive transmission systems work mostly at relatively low frequencies in the range of a few kilohertz to a few hundred kilohertz.

Die Übertragungstechnologie der langwelligen induktiven Datenübertragung wird aufgrund des Nachteils der geringen Reichweite nur selten eingesetzt. Dieser Nachteil beruht auf der Abnahme der Sendefeldenergie mit der dritten Potenz der Entfernung. Um etwas größere Entfernungen (1-2m) zu überbrücken, werden schon vergleichsweise starke Sendeleistungen mit starken Feldern benötigt.The transmission technology of long-wave inductive data transmission is due to the disadvantage of low Range rarely used. This disadvantage is due to the decrease in transmission field energy with the third power of Distance. To bridge somewhat larger distances (1-2m), are already having comparatively strong transmission powers strong fields.

Ein starkes Feld mit einer ausreichenden Feldstärke kann durch eine Spule mit vielen Windungen erzeugt werden. Eine solche Spulen weist eine entsprechend hohe Induktivität und damit auch einen entsprechend hohen Wechselstromwiderstand auf. Der maximale Strom, der durch die Spule geschickt werden kann, ergibt sich aus dem Quotienten von Versorgungsspannung und Wechselstromwiderstand.A strong field with sufficient field strength can generated by a coil with many turns. A such coils have a correspondingly high inductance and thus a correspondingly high AC resistance on. The maximum current that can be sent through the coil can be obtained from the quotient of the supply voltage and AC resistance.

Gerade bei batteriebetriebenen Geräten steht meist nur eine sehr niedrige Betriebsspannung zur Verfügung. Da die verwendeten Spulen relativ hohe Wechselstromwiderstände, z.B. 1 KΩ, aufweisen, ist der mögliche Sendestrom durch die Spule und damit auch die Sendeleistung stark begrenzt. There is usually only one, especially for battery-operated devices very low operating voltage available. Because the used Coils have relatively high AC resistances, e.g. 1 KΩ, is the possible transmission current through the coil and thus the transmission power is severely limited.

Das bedeutet, dass eine Vergrößerung der Reichweite mit einigem technische Aufwand verbunden ist, da eine Methode gefunden werden muss, eine höhere an der Spule anliegende Spannung zu erzeugen, insbesondere bei gleicher durch die Batteriespannung gegebener Betriebsspannung.That means expanding the range with some Technical effort is involved as a method is found a higher voltage applied to the coil to generate, especially at the same by the battery voltage given operating voltage.

Aus DE 199 15 846 C1 ist ein teilweise implantierbares System zur Rehabilitierung einer Hörstörung bekannt, dass eine drahtlose Telemetrieeinrichtung zur Übertragung von Daten zwischen einem implantierbaren Teil des Systems und einer externen Einheit aufweist.DE 199 15 846 C1 describes a partially implantable system known for the rehabilitation of a hearing impairment that a wireless telemetry device for the transmission of data between an implantable part of the system and an external one Unit.

Aus DE 43 26 358 C1 ist eine Induktionsspule bekannt, deren Spulenkörper aus einem Stanzteil mit zwei endseitigen Anformungen besteht, die eine auf den Spulenkörper gewickelte Spulenwicklung seitlich begrenzen.From DE 43 26 358 C1 an induction coil is known, the Coil body made of a stamped part with two end formings consists of a coil winding wound on the bobbin limit laterally.

Der Erfindung liegt die Aufgabe zu Grunde, ein Sendespulensystem und eine Fernbedienung für ein Hörhilfsgerät anzugeben, welche trotz einer begrenzt zur Verfügung stehenden Versorgungsspannung eine hinreichend hohe Sendeleistung insbesondere zur Datenübertragung zur Verfügung stellt.The invention is based on the object of a transmitter coil system and to specify a remote control for a hearing aid, which despite a limited availability Supply voltage a sufficiently high transmission power in particular for data transmission.

Die erstgenannte Aufgabe wird bei einem Sendespulensystem mit einer ersten und einer zweiten Sendespule sowie mit einem Spulenkern dadurch gelöst, dass die erste Sendespule mit einer Anregeeinheit verbindbar ist, die zweite Sendespule als Teil eines resonant anregbaren Schwingkreises verwendbar ist und die beiden Sendespulen nebeneinander auf den Spulenkern gewickelt sind, so dass beide Sendespule lose magnetisch miteinander gekoppelt sind.The first task is with a transmitter coil system a first and a second transmitter coil and with one Solved coil core in that the first transmitter coil with a Excitation unit can be connected, the second transmitter coil as Part of a resonant resonant circuit can be used and the two transmitter coils next to each other on the coil core are wound so that both transmitter coils are loosely magnetically connected to each other are coupled.

Mit dieser Anordnung können ohne zusätzlichen technischen Aufwand sehr starke Sendefelder erzeugt werden, obwohl nur sehr niedrige Betriebsspannungen zur Verfügung stehen. Dazu ist es nötig, dass die beiden Sendespulen lose magnetisch miteinander gekoppelt sind. Dies wird beispielsweise dadurch erzielt, dass zwischen den beiden Sendespulen ein wicklungsfreier Raum angeordnet ist. Die lose Kopplung führt bei einer Anregung der ersten Sendespule mithilfe einer beispielsweise alternierenden Betriebsspannungen durch die Anregeeinheit zu einer resonant überhöhten Anregung der zweiten Sendespule. Voraussetzung ist, dass beide Sendespulen nicht vom gleichen Magnetfeld durchflossen werden, wie das bei einer starren Kopplung der Fall ist, bei der beide Sendespulen übereinander und nicht nebeneinander um den Spulenkern gewickelt sind, d.h., dass sie vom gleichen Magnetfeld durchflossen werden.With this arrangement, no additional technical Very strong broadcast fields are generated, although only very low operating voltages are available. To it is necessary that the two transmitter coils are loosely magnetic are coupled together. This is done, for example achieved that between the two transmitter coils a non-winding Space is arranged. The loose coupling leads to one Excitation of the first transmitter coil using, for example alternating operating voltages by the excitation unit a resonantly excessive excitation of the second transmitter coil. The prerequisite is that both transmitter coils are not of the same Magnetic field flow through, like that with a rigid Coupling is the case where both transmit coils are on top of each other and are not wrapped side by side around the coil core, i.e. the same magnetic field flows through them.

Durch die lose Kopplung ergibt sich eine Erregung der zweiten Sendespule mit einer Phasenverschiebung, die ein Aufschaukeln der an der zweiten Sendespule anliegenden Spannung bewirkt. Aufgrund der größeren Spannung fließt auch ein höherer Strom, der wiederum zu einem wesentlich höheren Sendemagnetfeld führt. Die Sendeleistung ist erheblich stärker als die im Fall der starren Kopplung. Das heißt, das Sendespulensystem arbeitet erheblich effektiver.The loose coupling results in excitation of the second Transmitter coil with a phase shift that is rocking of the voltage applied to the second transmitter coil. Because of the larger voltage, a higher current flows, which in turn leads to a much higher transmission magnetic field leads. The transmission power is considerably stronger than that in Case of rigid coupling. That is, the coil system works much more effectively.

Durch die Erfindung werden keine zusätzlichen Spannungsvervielfacher mehr benötigt, beziehungsweise es können Batterien mit weniger Spannung verwendet werden, oder es müssen weniger Batterien in Reihe geschaltet werden. Auch dadurch lässt sich Platz beziehungsweise Bauraum sparen.The invention does not make any additional voltage multipliers needs more, or batteries can to be used with less tension or less Batteries can be connected in series. This can also be done Save space or installation space.

Durch die spezielle Anordnung und der damit bewirkten Funktion können nun auch über weitere Entfernungen energiesparend Daten übertragen werden.Due to the special arrangement and the resulting function can now save energy even over longer distances Data is transferred.

Ein weiterer Vorteil der Möglichkeit der langwelligen Datenübertragung mittels des Sendespulensystems liegt in der problemlosen Durchdringung von Materie ohne diese merklich zu beeinflussen. Gerade bei der Verwendung des Sendespulensystems mit Hörhilfsgeräten ist dies von entscheidender Bedeutung, da im Bereich des Kopf gesendet wird und natürlich keinerlei Beeinflussung des Gewebes erfolgen darf.Another advantage of the possibility of long-wave data transmission by means of the transmitter coil system lies in the problem-free Penetration of matter without noticeably influencing it. Especially when using the transmitter coil system with hearing aids this is vital since is sent in the area of the head and of course no influence of the tissue may take place.

In einer Vorteilhaften Ausführungsform weist die erste Sendespule weniger Wicklungen auf als die zweite Sendespule. Dies ermöglicht ein niederohmiges verlustarmes, d.h. stromsparendes, Anregen der ersten Sendespule. Die resonant anregbare zweite Sendespule hat dagegen viele Windungen. Da das Magnetfeld durch die Summe der Ströme in allen Windungen bestimmt wird, ergibt sich dadurch ein starkes Sendefeld. Weist die zweite Sendespule eine größere Windungszahlen als die erste Sendespule auf, ist demnach die Erzeugung von starken Sendefeldern sehr effizient.In an advantageous embodiment, the first transmitter coil fewer windings than the second transmitter coil. This enables a low-resistance low-loss, i.e. power-saving, Excitation of the first transmitter coil. The resonantly excitable the second transmitter coil, on the other hand, has many turns. Because the magnetic field determined by the sum of the currents in all turns this results in a strong transmission field. Know that second coil has a larger number of turns than the first Transmitter coil is, therefore, the generation of strong transmission fields very efficient.

In einer vorteilhaften Ausführungsform des Sendespulensystems bildet die zweite Sendespule mit einem Kondensator einen Schwingkreis. Zur resonanten Erregung auch bei einer Zweifrequenzanregung beispielsweise zur binären Datenübertragung ist es vorteilhaft, dass der Schwingkreis eine nicht zu hohe Güte, d.h. eine breite Güte-Verteilung aufweist, welche die beiden verwendeten Frequenzen abdeckt.In an advantageous embodiment of the transmitter coil system the second transmitter coil forms a capacitor Resonant circuit. For resonant excitation even with two-frequency excitation for example for binary data transmission it is advantageous that the resonant circuit is not too high Goodness, i.e. has a broad quality distribution, which the covers both frequencies used.

In einer vorteilhaften Ausführungsform des Sendespulensystems besteht die erste Sendespule aus zwei Teilspulen, die symmetrisch zur zweiten Sendespule auf dem Spulenkern angeordnet sind. Die Aufteilung in zwei Teilspulen, beispielsweise mit einer Mittelanzapfung hat den Vorteil der einfacheren Spannungsversorgung mit weniger Bauteilen (z.B. nur zwei Transistoren) und stellt eine Möglichkeit dar, die Teilspulen symmetrisch anzuordnen. Die symmetrische Anordnung hat ihrerseits den Vorteil eines symmetrisch abgestrahlten Feldes.In an advantageous embodiment of the transmitter coil system the first transmitter coil consists of two sub-coils that are symmetrical arranged to the second transmitter coil on the coil core are. The division into two sub-coils, for example with a center tap has the advantage of simpler power supply with fewer components (e.g. only two transistors) and represents a way of making the sub-coils symmetrical to arrange. The symmetrical arrangement has in turn the advantage of a symmetrically radiated field.

Sind die Spulen asymmetrisch angeordnet, d.h. auf der einen Seite befindet sich die erste Sendespule und auf der anderen die zweite Sendespule, ist auch der erzeugte Feldverlauf asymmetrisch. Je nach Auslegung der Windungszahlen und Verstärkung ist dies vernachlässigbar. Are the coils arranged asymmetrically, i.e. on the one Side is the first coil and on the other the second transmitter coil is also the generated field profile asymmetric. Depending on the design of the number of turns and reinforcement this is negligible.

Wird das Sendespulensystem zum Senden und Empfangen verwendet, wird außer der Sendespule (den Sendespulen) auch eine Empfangsspule benötigt. Diese Empfangsspule hat normalerweise deutlich mehr Windungen als die Sendespulen, um möglichst hohe Spannungen beim Empfang von schwachen Magnetfeldern zu erreichen. Der Einfachheit halber ist es vorteilhaft, Sendeund Empfangsspulen auf einen gemeinsamen Kern zu wickeln. Dabei bietet es sich vorteilhaft an, die Empfangsspule als zweite Sendespule zu verwenden. Insbesondere dann, wenn nicht gleichzeitig gesendet und empfangen wird, sondern Senden und Empfang zeitlich nacheinander stattfinden.If the coil system is used for sending and receiving, in addition to the transmitter coil (the transmitter coils) Reception coil needed. This receiving coil usually has significantly more turns than the transmitter coils, if possible high voltages when receiving weak magnetic fields to reach. For the sake of simplicity, it is advantageous to transmit and To wind reception coils on a common core. there it is advantageous to use the receiving coil as second coil to use. Especially if not is sent and received at the same time, but sending and Reception take place sequentially.

Vorteilhaft ist dabei die Verwendung eines Folienkondensators für den Schwingkreis, der für Senden und Empfang verwendet wird und dessen Kapazität von der anliegenden Spannung unabhängig ist. Dadurch ändert sich die Schwingfrequenz des Schwingkreises nicht zwischen den hohen Spannungen beim Senden und den niedrigen Spannungen beim Empfang.The use of a film capacitor is advantageous for the resonant circuit used for sending and receiving and its capacity is independent of the applied voltage is. This changes the vibration frequency of the Resonant circuit is not between the high voltages when sending and the low voltages on reception.

In vorteilhafter Weise brauchen somit erfindungsgemäß nicht zwei voneinander unabhängige Sende- bzw Empfangsspulen auf zwei Spulenkerne gewickelt zu werden. Es können stattdessen beide Spule auf einen einzigen Kern gewickelt werden. Dadurch kann Platz eingespart werden. Gerade unter Bedingungen, wie sie bei Fernbedienungen vorliegen, ist für die im kHz-Frequenzbereich verhältnismäßig großen Spulen wenig Platz. Die Einsparung eines Kerns ermöglicht ein deutlich kleineres Volumen des Sende-(Empfangs-)Spulensystem, beziehungsweise z.B. der Fernbedienung. Zusätzlich ist die Kombination von beiden Spulen auf einem Kern in der Herstellung billiger als die Herstellung zweier völlig getrennter Spulen.Advantageously, therefore, according to the invention, do not need two independent transmitting or receiving coils two coil cores to be wound. Instead, you can both spools are wound on a single core. Thereby space can be saved. Especially under conditions like they are available with remote controls, is in the kHz frequency range relatively large coils little space. The Saving a core enables a significantly smaller volume of the transmitting (receiving) coil system, or e.g. the remote control. In addition, the combination of both Coils on a core are cheaper to manufacture than that Production of two completely separate coils.

Da eine als zweite Sendespule verwendete Empfangsspule beim Senden stark übersteuert wird, ist es vorteilhaft, dass die Empfangsspule zum Schutz vor einer Zerstörung einer zur Empfangsspule gehörenden Empfangseinheit über eine Schutzschaltung mit der Empfangseinheit verbunden ist.Since a receiving coil used as a second transmission coil in the Sending is heavily overloaded, it is advantageous that the Receiver coil to protect against destruction of a receiver coil belonging receiving unit via a protective circuit is connected to the receiving unit.

Ferner wird die zweitgenannte Aufgabe durch eine Fernbedienung für ein Hörhilfsgerät mit einem solchem Sendespulensystem gelöst.Furthermore, the second task is performed by a remote control for a hearing aid with such a transmitter coil system solved.

Weitere vorteilhafte Ausführungsformen der Erfindung sind durch die Merkmale der Unteransprüche gekennzeichnet.Further advantageous embodiments of the invention are characterized by the features of the subclaims.

Es folgt die Erläuterung von mehreren Ausführungsbeispielen der Erfindung anhand der Figuren 1 bis 4. Es zeigen:

FIG 1
eine asymmetrische Anordnung zweier Sendespulen eines Sendespulensystems,
FIG 2
eine symmetrische Anordnung zweier Sendespulen eines Sendespulensystems,
FIG 3
den Spannungsverlauf der asymmetrischen Anordnung aus Figur 1 bei einer Anregung der ersten Sendespule und
FIG 4
ein Schaltbild einer Fernbedienung mit einem Sendespulensystem, dessen zweite Spule auch als Empfangsspule betrieben wird.
The following explains several exemplary embodiments of the invention with reference to FIGS. 1 to 4. The figures show:
FIG. 1
an asymmetrical arrangement of two transmit coils of a transmit coil system,
FIG 2
a symmetrical arrangement of two transmitter coils of a transmitter coil system,
FIG 3
the voltage curve of the asymmetrical arrangement of Figure 1 when the first transmitter coil and
FIG 4
a circuit diagram of a remote control with a transmitting coil system, the second coil is also operated as a receiving coil.

Figur 1 zeigt ein Sendespulensystem 1 für eine Fernbedienung eines Hörhilfsgeräts. Bei der Einstellung von beipsielsweise verschiedenen Empfangsmoden im Hörhiflsgerät werden Datenraten von einigen 100 Bit pro Sekunde mit dem Sendespulensystem 1 erreicht. Die Anregungsfrequenzen liegen bei der verwendeten Zweifrequenzangregung bei 116 kHz und 121 kHz. Die Fernbedienung wird manuell bedient, so dass eine Reichweite von ca. 1-2 m benötigt wird, um eine gute Kommunikation mit dem Hörhilfsgerät zu ermöglichen. Die Fernbedienung weist eine handliche Größe auf. Als Energiequelle dient eine Batterie, die die zur Verfügung stehende Spannung begrenzt.Figure 1 shows a coil system 1 for a remote control a hearing aid. When setting, for example Different reception modes in the hearing aid become data rates of some 100 bits per second with the coil system 1 reached. The excitation frequencies are the used Dual frequency excitation at 116 kHz and 121 kHz. The remote control is operated manually, so that a range of approx. 1-2 m is required to ensure good communication with the To enable hearing aid. The remote control has one handy size on. A battery serves as an energy source, which limits the available voltage.

Das Sendespulensystem 1 weist eine erste Sendespule 3, eine zweite Sendespule 5 und einen Spulenkern 7 auf. Die erste Sendespule 3 besteht aus zwei Teilspulen 3A,3B, die beispielsweise durch Mittelanzapfung einer Spule gebildet werden. Die Teilspulen 3A,3B weisen jeweils 50 Wicklungen auf und nehmen ca. 10 mm des ca. 35 mm langen Spulenkerns ein. An die erste Sendespule 3 schließt sich ein ca. 5 mm langer wicklungsfreier Raum 9 an. Auf der anderen Seite des wicklungsfreien Raums 9 befindet sich die zweite Sendespule 5 auf einer Länge von ca. 20 mm bei einer Wicklungszahl von ca. 150 Windungen.The transmitter coil system 1 has a first transmitter coil 3, one second transmitter coil 5 and a coil core 7. The first Transmitting coil 3 consists of two sub-coils 3A, 3B, for example be formed by tapping the center of a coil. The sub-coils 3A, 3B each have 50 windings and take up approx. 10 mm of the approx. 35 mm long coil core. On the first transmitter coil 3 closes an approximately 5 mm long non-winding space 9. On the other side of the non-winding Room 9 is the second transmitter coil 5 a length of approx. 20 mm with a number of windings of approx. 150 Turns.

Die zweite Sendespule bildet mit einem nicht eingezeichneten Kondensator von z.B. 2 nF einen Schwingkreis. Der Spulenkern ist ein Ferritkern mit einem Durchmesser von ca. 6 mm.The second transmitter coil forms with one not shown Capacitor of e.g. 2 nF a resonant circuit. The coil core is a ferrite core with a diameter of approx. 6 mm.

Die Teilspulen 3A,3B sind aufeinander gewickelt und über eine Mittelanzapfung mit einer Sendeeinheit verbindbar.The partial coils 3A, 3B are wound on one another and over one Center tap can be connected to a transmitter unit.

Figur 2 zeigt eine symmetrische Anordnung eines Sendespulensystems 11, bei dem die erste Sendespule, die wiederum in zwei Teilspulen 13A, 13B aufgeteilt ist, symmetrisch an den beiden Enden der zweiten Sendespule 15 angeordnet ist. Zwischen den Teilspulen 13A, 13B und der zweiten Sendespule 15 befinden sich zwei wicklungsfreie Räume 17A, 17B. Die Spulen sind um einen Spulenkern 19 gewickelt.Figure 2 shows a symmetrical arrangement of a transmitter coil system 11, in which the first transmitter coil, which in turn in two sub-coils 13A, 13B is divided, symmetrically on the both ends of the second transmitter coil 15 is arranged. Between the sub-coils 13A, 13B and the second transmission coil 15 there are two non-winding spaces 17A, 17B. The spools are wound around a coil core 19.

In Figur 3 ist der Verlauf der Spannungen an den Spulen aus Figur 1 dargestellt. Aufgetragen ist jeweils die Spannung U über die Zeit T über die ersten 100 µs. Man erkennt das abwechselnde An- und Ausschalten der Spannungen U3A, U3B, die an den Teilspulen 3A,3B der ersten Sendespule 3 in Figur 1 anliegen. Der Spannungswert 21, der an den Teilspulen 3A,3B anliegt, beträgt ca. 3,7 V. Zusätzlich ist in Figur 3 der Spannungsverlauf U5, der an der zweiten Sendespule 5 anliegt, dargestellt. Der Spannungswert 23, der sich nach ca. einer Anschwingzeit von 60 µs eingestellt hat, beträgt ca. 80 V. Dies entspricht einer deutlich resonant überhöhten Spannung an der zweiten Sendespule 5 um einen Faktor zehn. Bei starrer Kopplung ergäbe sich maximal ein Faktor drei in der Verstärkung aufgrund des Wicklungszahlverhältnisses.FIG. 3 shows the course of the voltages on the coils from FIG. 1. The voltage U is plotted over time T over the first 100 microseconds. One recognizes the alternate switching on and off of the voltages U 3A , U 3B , which are applied to the partial coils 3A, 3B of the first transmitter coil 3 in FIG. The voltage value 21, which is applied to the partial coils 3A, 3B, is approximately 3.7 V. In addition, the voltage profile U5, which is applied to the second transmitter coil 5, is shown in FIG. The voltage value 23, which has set in after a rise time of 60 μs, is approximately 80 V. This corresponds to a significantly resonantly excessive voltage at the second transmitter coil 5 by a factor of ten. With rigid coupling there would be a maximum of a factor of three in the gain due to the number of windings.

Durch die deutlich höhere Spannung fließt auch ein deutlich höherer Strom, der wiederum zu wesentlich größeren Magnetfeldern führt. Die Stromaufnahme des gesamten Systems steigt nur geringfügig. Die Sendeleistung steigt dagegen aufgrund des effektiveren Arbeitens des Systems erheblich, ohne dass dafür zusätzliche Hardware erforderlich ist.Due to the significantly higher voltage, a also flows significantly higher current, which in turn leads to much larger magnetic fields leads. The current consumption of the entire system only increases slightly. The transmission power, however, increases due to the more effective working of the system significantly without it additional hardware is required.

Bei den Spannungsverläufen U3A,U3B erkennt man zusätzlich eine Spannungsspitze 25, die aufgrund der Rückwirkung der zweiten Sendespule 5 entsteht.In the case of the voltage profiles U 3A , U 3B , a voltage peak 25 can also be seen which arises due to the reaction of the second transmitter coil 5.

Figur 4 zeigt eine Fernsteuerung 100 für ein Hörhilfsgerät anhand eines schematisierten Schaltplans. Die Anregeeinheit 101 ist mit einer oder mehreren Sendespulen 102 ausgestattet. Die Sendespulen sind über einen gemeinsamen Kern 103 mit einer Empfangsspule 104 lose gekoppelt, welche als zweite Sendespule dient. Die Anordnung der Spulen 102,104 entspricht beispielsweise den Anordnungen der Figuren 1 oder 2. Parallel an die Empfangsspule 104 ist ein Schwingkreiskondensator 105 angeschlossen. An die beiden Pole des so gebildeten Parallelschwingkreises 110 ist eine Schutzschaltung bestehend aus einem Schutzkondensator 106 und einer dazu in Reihe geschalteten Parallelschaltung zweier antiparalleler Dioden 107 und 108 angeschlossen. Die parallel geschalteten Dioden 107 und 108 sind an den Eingang einer Empfangseinheit 109 angeschlossen.FIG. 4 shows a remote control 100 for a hearing aid based on a schematic circuit diagram. The excitation unit 101 is equipped with one or more transmitter coils 102. The transmission coils are connected to a common core 103 Receiving coil 104 loosely coupled, which acts as a second transmitting coil serves. The arrangement of the coils 102, 104 corresponds for example the arrangements of Figures 1 or 2. Parallel to the receiving coil 104 is a resonant circuit capacitor 105 connected. To the two poles of the parallel resonant circuit thus formed 110 is a protection circuit consisting of a Protection capacitor 106 and one connected in series Parallel connection of two anti-parallel diodes 107 and 108 connected. The diodes 107 and 108 are connected to the input of a receiving unit 109.

Die Funktionsweise dieser Schaltung sei im Folgenden näher erläutert. Die ohnehin notwendige getrennte Empfangsspule 104 ist auf den gleichen Kern neben die Sendespulen 102 gewickelt und ist mit dieser lose gekoppelt. Dadurch wird die Empfangsspule 104, die mit ihrem zugehörigen Kondensator 105 den kompletten Schwingkreis 110 darstellt, durch die Sendespulen 102 ebenfalls zum Schwingen angeregt. Da die Empfangsspule 104 im Vergleich zu den Sendespulen 102 mehr Windungen hat, werden im resonant angeregten Schwingkreis 110 während des Sendevorganges relativ hohe Spannungen erzeugt, die durch den Schwingungseffekt des Schwingkreises 110 trotz der vielen Windungen auch wieder recht hohe Ströme und damit abgestrahlte Magnetfelder erzeugen. Die eigentlichen Sendespulen 102 liefern jetzt nur noch die abgestrahlte Energie nach. Daher braucht durch die Sendespulen 102 nicht mehr soviel Strom zu fließen. Das starke Sendefeld wird jetzt von der durch die Sendespulen 102 erregten Empfangsspule 104 erzeugt.The mode of operation of this circuit is described in more detail below explained. The separate receiving coil 104, which is necessary anyway is wound on the same core next to the transmitter coils 102 and is loosely coupled to it. This will make the receiving coil 104, the complete with their associated capacitor 105 Represents resonant circuit 110 by the transmitter coils 102 also stimulated to vibrate. Since the receiving coil 104 in the Compared to the transmitter coils 102 has more turns in the resonantly excited resonant circuit 110 during the transmission process generated relatively high voltages due to the vibration effect of the oscillating circuit 110 despite the many turns again very high currents and thus radiated magnetic fields produce. Deliver the actual transmission coils 102 now only the radiated energy. Therefore needs not as much current to flow through the transmitter coils 102. The strong transmission field is now from that through the transmission coils 102 excited receiving coil 104 generated.

Wegen der Erregung durch die Sendespulen 102, die von außen gesteuert werden, ist auch die Frequenz absolut stabil und von außen vorgebbar. Toleranzen der Bauteile in den Schwingkreisen 110 haben also keinen Einfluss auf die Sendefrequenz. Sie wirken sich lediglich in gewissem Maß auf den Wirkungsgrad des Sendevorgangs aus.Because of the excitation from the transmitter coils 102, the outside are controlled, the frequency is also absolutely stable and can be specified from the outside. Tolerances of the components in the resonant circuits 110 therefore have no influence on the transmission frequency. They only have a certain effect on efficiency of the sending process.

Durch die Induktivitäten der Sendespulen 102 ändert sich die Induktivität der lose gekoppelten Empfangsspule 104, so dass die Eigenfrequenz des Schwingkreises 110 nach Ändern des zugehörigen Kapazitätswertes des Schwingkreiskondensators 5 korrigiert werden muss. Die Induktivität des Schwingkreises 110 wird kleiner, d.h. die Kapazität des Schwingkreises 110 muss erhöht werden. Eine hierzu geeignete Kapazität kann ohne Probleme so verschaltet werden, dass sie gleichzeitig als Schutz für die empfindliche Empfangseinheit 109 dient. Da eine solche Schutzschaltung 112 ohnehin benötigt wird, kommt diese Schaltungslösung ohne zusätzliche Bauteile aus. Die Schutzschaltung 112 besteht nur aus dem Korrekturkondensator 106 und den antiparallel geschalteten Dioden 107 und 108, die parallel zum Kondensator 105 des Schwingkreises 110 angeschlossen sind. Die Empfangssignale werden an den Dioden 107, 108 abgegriffen.The inductances of the transmission coils 102 change the Inductance of the loosely coupled receiving coil 104 so that the natural frequency of the resonant circuit 110 after changing the associated one Capacitance value of the resonant circuit capacitor 5 needs to be corrected. The inductance of the resonant circuit 110 becomes smaller, i.e. the capacity of the resonant circuit 110 must be increased. A suitable capacity can be used without Problems are interconnected in such a way that they can be used as Protection for the sensitive receiving unit 109 is used. There such a protection circuit 112 is needed anyway this circuit solution without additional components. The Protection circuit 112 consists only of the correction capacitor 106 and the antiparallel connected diodes 107 and 108, the connected in parallel to the capacitor 105 of the resonant circuit 110 are. The received signals are at the diodes 107, 108 tapped.

Bei den im Sendebetrieb erzeugten hohen Spannungen von typischerweise etwa ±50 V gehen die Dioden 107, 108 in den leitenden Zustand und schalten damit den ihnen vorgelagerten Kondensator 106 parallel zum Schwingkreiskondensator 105 des Empfangskreises. Damit wird die Resonanzfrequenz des Schwingkreises 110 für den Sendebetrieb korrigiert. Gleichzeitig werden die Signale am Eingang des hochohmigen Empfängers durch die Dioden 107, 108 auf maximal ca. 0,7 V begrenzt. Die meiste vom Schwingkreis 110 erzeugt Spannung fällt dann an dem Schutzkondensator 106 ab.With the high voltages of typically generated during transmission about ± 50 V the diodes 107, 108 go into the conductive State and thus switch the upstream Capacitor 106 in parallel with the resonant circuit capacitor 105 of the Reception circuit. So that the resonance frequency of the resonant circuit 110 corrected for broadcasting. simultaneously are the signals at the input of the high impedance receiver limited to a maximum of approximately 0.7 V by the diodes 107, 108. The most of the voltage generated by the resonant circuit 110 then occurs the protective capacitor 106.

Im Empfangsbetrieb sind die Empfangssignale so klein, dass die Dioden 107, 108 sperren. Die Spannungen der Empfangssignale erreichen typischerweise höchstens den mV-Bereich. Dadurch ist nur noch der ursprüngliche Schwingkreiskondensator 105 aktiv. Gleichzeitig sind die Sendespulen 102 abgeschaltet. Das heißt, mindestens ein Anschluss jeder Sendespule 102 ist offen. Damit wirken sie sich auf den Schwingkreis 110 nicht mehr aus. Er kann also auf seiner Empfangsfrequenz, auf die er abgestimmt ist, frei schwingen. Das Signal wird somit nahezu ohne Verluste über den Schutz- beziehungsweise Korrekturkondensator 6 an die Schutzdioden 107, 108 weiter übertragen. Wegen der geringen Empfangsspannung sind diese Dioden 107, 108 gesperrt. D.h. die Empfangsspannung kann an den Diodenanschlüssen in voller Höhe vom hochohmigen Empfängereingang abgenommen werden.In reception mode, the reception signals are so small that block the diodes 107, 108. The voltages of the received signals typically reach at most the mV range. Thereby is only the original resonant circuit capacitor 105 active. At the same time, the transmission coils 102 are switched off. That is, at least one connector of each transmitter coil 102 is open. This affects the resonant circuit 110 no longer out. So it can be based on its reception frequency which he is tuned to swing freely. The signal is thus almost no losses through the protection or correction capacitor 6 further transmitted to the protection diodes 107, 108. Because of the low reception voltage, these are diodes 107, 108 blocked. That the receive voltage can be at the diode connections in full from the high-resistance receiver input be removed.

Die vorgestellte Schaltung besitzt damit neben dem Vorteil, dass die Empfangsspule als Sendeverstärker verwendet wird, auch den Vorteil eines verminderten Platzbedarfs, da für die Sende- und Empfangsspulen ein gemeinsamer Kern verwendet wird und der Schutzkondensator gleichzeitig auch als Korrekturkondensator verwendet wird.In addition to the advantage of the circuit presented, that the reception coil is used as a transmission amplifier, also the advantage of a reduced space requirement, because for the Transmit and receive coils a common core is used and the protective capacitor also serves as a correction capacitor is used.

Claims (10)

Sendespulensystem (1,11) für eine Fernbedienung (100) mit einer ersten und einer zweiten Sendespule (3,102,5,15,104) sowie mit einem Spulenkern (7,19),
dadurch gekennzeichnet, dass die erste Sendespule mit einer Anregeeinheit (101) verbindbar ist, die zweite Sendespule als Teil eines resonant anregbaren Schwingkreises (110) verwendbar ist und die beiden Sendespulen (3,102,5,15,104) nebeneinander auf den Spulenkern (7,19) gewickelt sind, so dass beide Sendespulen (3,102,5,15,104) lose magnetisch miteinander gekoppelt sind.Transmitting coil system (1,11) for a remote control (100) with a first and a second transmitting coil (3,102,5,15,104) and with a coil core (7,19),
characterized in that the first transmitter coil can be connected to an excitation unit (101), the second transmitter coil can be used as part of a resonantly excitable resonant circuit (110) and the two transmitter coils (3,102,5,15,104) side by side on the coil core (7,19) are wound so that both transmitter coils (3,102,5,15,104) are loosely magnetically coupled to each other. Sendespulensystem (1,11) nach Anspruch 1,
dadurch gekennzeichnet, dass zwischen den beiden Sendespulen (3,102,5,15,104) ein wicklungsfreier Raum (9,17A,17B) angeordnet ist.Transmitting coil system (1, 11) according to claim 1,
characterized in that a non-winding space (9,17A, 17B) is arranged between the two transmitter coils (3,102,5,15,104). Sendespulensystem (1,11) nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die erste Sendespule (3,102) weniger Wicklungen aufweist als die zweite Sendespule (5,15,104).Transmitting coil system (1, 11) according to claim 1 or 2,
characterized in that the first transmitter coil (3,102) has fewer windings than the second transmitter coil (5,15,104). Sendespulensystem (1,11) nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass die zweite Sendespule (5,15,104) mit einem Kondensator (105) den Schwingkreis (110) bildet.Transmitting coil system (1, 11) according to one of Claims 1 to 3,
characterized in that the second transmitter coil (5, 15, 104) forms the resonant circuit (110) with a capacitor (105). Sendespulensystem (11,11) nach Anspruch 4,
dadurch gekennzeichnet, dass der Kondensator (105) einen Folienkondensator ist.Transmitting coil system (11, 11) according to claim 4,
characterized in that the capacitor (105) is a film capacitor. Sendespulensystem (1,11) nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass die erste Sendespule (3,102) aus zwei Teilspulen (13A,13B) besteht, die symmetrisch zur zweiten Sendespule (15,104) auf dem Spulenkern (19) angeordnet sind.Transmitting coil system (1, 11) according to one of claims 1 to 5,
characterized in that the first transmitter coil (3, 102) consists of two sub-coils (13A, 13B) which are arranged symmetrically to the second transmitter coil (15, 104) on the coil core (19). Sendespulensystem (1,11) nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass die erste Sendespule (3,102) mit einer Anregeeinheit (101) insbesondere zur Zweifrequenzanregung verbindbar ist.Transmitting coil system (1, 11) according to one of Claims 1 to 6,
characterized in that the first transmitter coil (3, 102) can be connected to an excitation unit (101), in particular for two-frequency excitation. Sendespulensystem nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, dass die zweite Sendespule (5,15,104) eine Empfangsspule für eine Empfangseinheit (109) ist.Transmitting coil system according to one of Claims 1 to 7,
characterized in that the second transmitter coil (5, 15, 104) is a receiver coil for a receiver unit (109). Sendespulensystem (1,11) nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, dass die zweite Spule (5,15,104) mit der Empfangseinheit (109) über eine Schutzschaltung (112) zum Schutz der Empfangseinheit (109) im Sendebetrieb verbunden ist.Transmitting coil system (1, 11) according to one of Claims 1 to 8,
characterized in that the second coil (5, 15, 104) is connected to the receiving unit (109) via a protective circuit (112) for protecting the receiving unit (109) in transmission mode. Fernbedienung (100) für ein Hörhilfsgerät mit einem Sendespulensystem (1,11) nach einem der Ansprüche 1 bis 9.Remote control (100) for a hearing aid with a transmitter coil system (1, 11) according to one of claims 1 to 9.
EP04009708A 2003-05-22 2004-04-23 Transmission coil system and remote control for a hearing aid Expired - Lifetime EP1480492B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10323219 2003-05-22
DE10323219A DE10323219B3 (en) 2003-05-22 2003-05-22 Coil system and remote control for a hearing aid

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EP1480492A2 true EP1480492A2 (en) 2004-11-24
EP1480492A3 EP1480492A3 (en) 2007-09-19
EP1480492B1 EP1480492B1 (en) 2010-09-29

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US (1) US7277553B2 (en)
EP (1) EP1480492B1 (en)
AT (1) ATE483331T1 (en)
AU (1) AU2004202225B2 (en)
DE (2) DE10323219B3 (en)
DK (1) DK1480492T3 (en)

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EP1883165A2 (en) * 2006-07-28 2008-01-30 Siemens Audiologische Technik GmbH Receiving system and method for transmitting information for an otological device
EP1981253A1 (en) 2007-04-10 2008-10-15 Oticon A/S A user interface for a communications device
EP2117180A1 (en) 2008-05-07 2009-11-11 Oticon A/S A short range, uni-directional wireless link
EP2239964A1 (en) * 2009-04-07 2010-10-13 Siemens Medical Instruments Pte. Ltd. Hearing aid assembly with a neck belt with integrated antenna and accompanying method for wireless data transmission
EP2400665A1 (en) 2010-06-22 2011-12-28 Oticon A/S High voltage swing input/output enabled in a standard ic process using passive impedance transformation
EP2400546A1 (en) 2010-06-22 2011-12-28 Oticon A/S ESD protection in a standard cmos or bicmos ic process to enable high voltage input/outputs.
EP2472907A1 (en) 2010-12-29 2012-07-04 Oticon A/S A listening system comprising an alerting device and a listening device
US8358795B2 (en) 2006-07-28 2013-01-22 Siemens Audiologische Technik Gmbh Receiver system and method for transmitting information for an otological device
US8514965B2 (en) 2010-03-10 2013-08-20 Oticon A/S Wireless communication system with a modulation bandwidth comparable to or exceeding the bandwidth of the transmitter and/or receiver antennas
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Publication number Priority date Publication date Assignee Title
US8358795B2 (en) 2006-07-28 2013-01-22 Siemens Audiologische Technik Gmbh Receiver system and method for transmitting information for an otological device
EP1883165A2 (en) * 2006-07-28 2008-01-30 Siemens Audiologische Technik GmbH Receiving system and method for transmitting information for an otological device
EP1883165A3 (en) * 2006-07-28 2011-07-27 Siemens Audiologische Technik GmbH Receiving system and method for transmitting information for an otological device
EP1981253A1 (en) 2007-04-10 2008-10-15 Oticon A/S A user interface for a communications device
US8526879B2 (en) 2007-04-11 2013-09-03 Oticon A/S Wireless communication device for inductive coupling to another device
EP2117180A1 (en) 2008-05-07 2009-11-11 Oticon A/S A short range, uni-directional wireless link
EP2239964A1 (en) * 2009-04-07 2010-10-13 Siemens Medical Instruments Pte. Ltd. Hearing aid assembly with a neck belt with integrated antenna and accompanying method for wireless data transmission
US8340332B2 (en) 2009-04-07 2012-12-25 Siemens Medical Instruments Pte. Ltd. Hearing aid configuration with a lanyard with integrated antenna and associated method for wireless transmission of data
US8514965B2 (en) 2010-03-10 2013-08-20 Oticon A/S Wireless communication system with a modulation bandwidth comparable to or exceeding the bandwidth of the transmitter and/or receiver antennas
EP2400546A1 (en) 2010-06-22 2011-12-28 Oticon A/S ESD protection in a standard cmos or bicmos ic process to enable high voltage input/outputs.
EP2400665A1 (en) 2010-06-22 2011-12-28 Oticon A/S High voltage swing input/output enabled in a standard ic process using passive impedance transformation
US8639195B2 (en) 2010-06-22 2014-01-28 Oticon A/S High voltage swing input/output enabled in a standard IC process using passive impedance transformation
EP2472907A1 (en) 2010-12-29 2012-07-04 Oticon A/S A listening system comprising an alerting device and a listening device
US8760284B2 (en) 2010-12-29 2014-06-24 Oticon A/S Listening system comprising an alerting device and a listening device

Also Published As

Publication number Publication date
AU2004202225A1 (en) 2004-12-09
EP1480492B1 (en) 2010-09-29
US7277553B2 (en) 2007-10-02
DE10323219B3 (en) 2004-12-09
AU2004202225B2 (en) 2009-04-23
DK1480492T3 (en) 2011-01-31
US20050036638A1 (en) 2005-02-17
EP1480492A3 (en) 2007-09-19
DE502004011693D1 (en) 2010-11-11
ATE483331T1 (en) 2010-10-15

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