EP0829131A1 - Verstärker mit minimaler leistungsaufnahme - Google Patents
Verstärker mit minimaler leistungsaufnahmeInfo
- Publication number
- EP0829131A1 EP0829131A1 EP96914078A EP96914078A EP0829131A1 EP 0829131 A1 EP0829131 A1 EP 0829131A1 EP 96914078 A EP96914078 A EP 96914078A EP 96914078 A EP96914078 A EP 96914078A EP 0829131 A1 EP0829131 A1 EP 0829131A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- amplifier
- stages
- gain
- amplifier stages
- supply
- 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.)
- Withdrawn
Links
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000012285 ultrasound imaging Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
- H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High-frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/191—Tuned amplifiers
Definitions
- the invention relates to an amplifier.
- Electrical amplifiers are known which are constructed from individual amplifier stages connected in a chain. For example, asymmetrical differential amplifiers or cascode amplifiers are used as the individual amplifier stages of the amplifier (i et ze, Schenk: “Semiconductor switching technology”, Springer Verlag, Berlin 1990, 9th edition, pages 492-494).
- the individual amplifier stages are supplied by a common or a power supply, each with an operating voltage.
- the invention is therefore based on the object of specifying an amplifier which draws as little power as possible from a given gain V of the power supply.
- the amplifier contains a number n> 1 of individual amplifier stages which are electrically connected to one another in chain, each having the same gain V n .
- V (V n ) n therefore applies to the overall gain V of the amplifier.
- the invention is based on the knowledge that for a desired overall gain V of the amplifier there is an optimal number n of amplifier stages, each with the same individual gain V n , so that the power consumption of the amplifier is minimal.
- a computational optimization has shown that this optimal number n from the double inequality
- Amplifier stages with the same gain V n are Amplifier stages with the same gain V n .
- the gain V n to be set for each amplifier stage results in accordance with
- V n V (1 / n) (2)
- the table below shows the optimal number of stages n for a given total gain V of the amplifier in a range between 1 and 16510 (corresponding to 0 dB to 84.35 dB) based on the relationship (1):
- each of the individual amplifier stages takes up essentially the same supply power.
- the upper limit frequency of the transfer function of the amplifier is not influenced when the number n of amplifier stages connected in chain is changed.
- the same frequency response of the Velcro circuit is thus obtained even with a different number of amplifier stages. Therefore, if one chooses amplifier stages with an essentially identical upper cutoff frequency in an advantageous embodiment, the cutoff frequency of the entire amplifier corresponds to the upper cutoff frequency of each individual amplifier stage.
- the upper limit frequency of an amplifier or an amplifier stage means the frequency at which the amplification of the amplifier or the amplifier stage has decreased to a predetermined value.
- the upper limit frequency is chosen to be the - 3dB limit frequency, at which the gain is -3dB lower.
- All amplifier stages are preferably implemented with the same amplifier circuit in each case.
- Such an embodiment is technologically particularly easy to integrate in a semiconductor chip.
- a circuit is preferably chosen as the amplifier circuit for each amplifier stage in which the Miller effect is avoided and a high bandwidth is thus achieved, for example a cascode circuit or an asymmetrical differential amplifier circuit.
- an emitter circuit in particular with a subsequent emitter follower, a base circuit or an operational amplifier circuit for the amplifier stages, can also be selected.
- the amplifier according to the invention is preferably monolithically integrated in an IC and can in particular be used to amplify electrical signals in the high-frequency range, for example in a mobile phone or as a preamplifier for the received signals of a transducer element in an applicator (transducer head) of an ultrasound imaging device .
- the amplifier stages can be controlled.
- the gain V n of each amplifier stage and thus the overall gain V can then be varied.
- This embodiment of a controllable amplifier can be used, in particular, for dynamic compression of the received signals from ultrasonic transducer elements in an ultrasonic transducer head as a so-called time gain control amplifier in order to at least partially electro-mechanically damp the delay-dependent attenuation of the reflected ultrasonic pulses in the object under investigation niche balance.
- the number of stages n of the controllable amplifier then dimensioned according to the gain V, which is most frequently required in order to minimize the power consumed on average.
- the only figure in the drawing shows an embodiment of an amplifier with three amplifier stages 1, 2 and 3 connected in chain.
- the amplifications Vi, V 2 and V 3 of the three amplifier stages 1, 2 and 3 are all set identically.
- the chain connection of the three amplifier stages 1, 2 and 3 is between an input 4 and an output 5 of the
- the amplifier stages 1, 2 and 3 are supplied by a supply unit (not shown) with a supply voltage (or a supply current) which can be applied to two supply connections 6 and 7 common to the amplifier stages 1, 2 and 3.
- a supply voltage or a supply current
- more than just one supply voltage can also be provided, in particular also a separate supply voltage for each amplifier stage 1, 2 and 3. This is particularly advantageous in the case of DC-coupled amplifier stages 1, 2 and 3, in order to avoid a possible shift of the To compensate for resting potentials.
- the electrical power absorbed by the amplifier corresponds to the product of the supply voltage (operating voltage) applied to the supply connections 6 and 7 and the total supply current (operating current) flowing between these two supply connections 6 and 7 through the amplifier stages 1 to 3. .
- the power absorbed by the amplifier is equal to the sum of the Products from the individual supply voltages and the associated supply currents.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19519625 | 1995-05-29 | ||
DE19519625 | 1995-05-29 | ||
PCT/DE1996/000836 WO1996038906A1 (de) | 1995-05-29 | 1996-05-13 | Verstärker mit minimaler leistungsaufnahme |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0829131A1 true EP0829131A1 (de) | 1998-03-18 |
Family
ID=7763115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96914078A Withdrawn EP0829131A1 (de) | 1995-05-29 | 1996-05-13 | Verstärker mit minimaler leistungsaufnahme |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0829131A1 (de) |
JP (1) | JPH11505991A (de) |
WO (1) | WO1996038906A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018024676A1 (de) | 2016-08-01 | 2018-02-08 | Kurtz Gmbh | Füllinjektor und verfahren zum betreiben eines füllinjektors |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8311071D0 (en) * | 1983-04-22 | 1983-05-25 | Sinclair Res Ltd | Amplifier |
TW198152B (de) * | 1990-10-18 | 1993-01-11 | Hitachi Seisakusyo Kk |
-
1996
- 1996-05-13 JP JP8536083A patent/JPH11505991A/ja active Pending
- 1996-05-13 EP EP96914078A patent/EP0829131A1/de not_active Withdrawn
- 1996-05-13 WO PCT/DE1996/000836 patent/WO1996038906A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9638906A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018024676A1 (de) | 2016-08-01 | 2018-02-08 | Kurtz Gmbh | Füllinjektor und verfahren zum betreiben eines füllinjektors |
Also Published As
Publication number | Publication date |
---|---|
JPH11505991A (ja) | 1999-05-25 |
WO1996038906A1 (de) | 1996-12-05 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 19971120 |
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AK | Designated contracting states |
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17Q | First examination report despatched |
Effective date: 19980806 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: INFINEON TECHNOLOGIES AG |
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