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WO2015039002A3 - Systems and methods for detection of load impedance of a transducer device coupled to an audio device - Google Patents

Systems and methods for detection of load impedance of a transducer device coupled to an audio device Download PDF

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Publication number
WO2015039002A3
WO2015039002A3 PCT/US2014/055576 US2014055576W WO2015039002A3 WO 2015039002 A3 WO2015039002 A3 WO 2015039002A3 US 2014055576 W US2014055576 W US 2014055576W WO 2015039002 A3 WO2015039002 A3 WO 2015039002A3
Authority
WO
WIPO (PCT)
Prior art keywords
transducer
audio
systems
methods
load impedance
Prior art date
Application number
PCT/US2014/055576
Other languages
French (fr)
Other versions
WO2015039002A2 (en
WO2015039002A4 (en
Inventor
Anand Ilango
Daniel John Allen
Vivek JINDAL
Aniruddha SATOSKAR
Bharath Kumar THANDRI
Original Assignee
Cirrus Logic, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US14/031,287 external-priority patent/US9438982B2/en
Priority claimed from US14/036,682 external-priority patent/US9578417B2/en
Application filed by Cirrus Logic, Inc. filed Critical Cirrus Logic, Inc.
Priority to EP14777232.1A priority Critical patent/EP3047571B1/en
Priority to EP21175205.0A priority patent/EP3905517A1/en
Priority to EP17207083.1A priority patent/EP3352373B1/en
Priority to CN201480062714.3A priority patent/CN106063124B/en
Publication of WO2015039002A2 publication Critical patent/WO2015039002A2/en
Publication of WO2015039002A3 publication Critical patent/WO2015039002A3/en
Publication of WO2015039002A4 publication Critical patent/WO2015039002A4/en

Links

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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • 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
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • 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
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/04—Circuit arrangements, e.g. for selective connection of amplifier inputs/outputs to loudspeakers, for loudspeaker detection, or for adaptation of settings to personal preferences or hearing impairments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/05—Detection of connection of loudspeakers or headphones to amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)

Abstract

In accordance with systems and methods of the present disclosure, an audio device may include an electrical terminal, an audio circuit, and a transducer load detection circuit. The electrical terminal may couple a transducer device to the audio device. The audio circuit may generate an analog audio signal, wherein the analog audio signal is coupled to the electrical terminal. The transducer load detection circuit may detect a load impedance of the transducer device when the transducer device is coupled to the audio device from characteristics measured at the electrical terminal.
PCT/US2014/055576 2013-09-16 2014-09-15 Systems and methods for detection of load impedance of a transducer device coupled to an audio device WO2015039002A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP14777232.1A EP3047571B1 (en) 2013-09-16 2014-09-15 Systems and methods for detection of load impedance of a transducer device coupled to an audio device
EP21175205.0A EP3905517A1 (en) 2013-09-16 2014-09-15 Systems and methods for detection of load impedance of a transducer device coupled to an audio device
EP17207083.1A EP3352373B1 (en) 2013-09-16 2014-09-15 Systems and methods for detection of load impedance of a transducer device coupled to an audio device
CN201480062714.3A CN106063124B (en) 2013-09-16 2014-09-15 For detecting the system and method for being coupled to the load impedance of transducer device of audio frequency apparatus

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US201361878138P 2013-09-16 2013-09-16
US61/878,138 2013-09-16
US14/031,287 2013-09-19
US14/031,287 US9438982B2 (en) 2013-09-16 2013-09-19 Systems and methods for detection of load impedance of a transducer device coupled to an audio device
US14/036,682 2013-09-25
US14/036,682 US9578417B2 (en) 2013-09-16 2013-09-25 Systems and methods for detection of load impedance of a transducer device coupled to an audio device
US14/036,136 2013-09-25
US14/036,136 US9479868B2 (en) 2013-09-16 2013-09-25 Systems and methods for detection of load impedance of a transducer device coupled to an audio device

Publications (3)

Publication Number Publication Date
WO2015039002A2 WO2015039002A2 (en) 2015-03-19
WO2015039002A3 true WO2015039002A3 (en) 2015-07-02
WO2015039002A4 WO2015039002A4 (en) 2015-08-13

Family

ID=51627369

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/055576 WO2015039002A2 (en) 2013-09-16 2014-09-15 Systems and methods for detection of load impedance of a transducer device coupled to an audio device

Country Status (1)

Country Link
WO (1) WO2015039002A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9438982B2 (en) 2013-09-16 2016-09-06 Cirrus Logic, Inc. Systems and methods for detection of load impedance of a transducer device coupled to an audio device
US9479868B2 (en) 2013-09-16 2016-10-25 Cirrus Logic, Inc. Systems and methods for detection of load impedance of a transducer device coupled to an audio device
US9986351B2 (en) 2016-02-22 2018-05-29 Cirrus Logic, Inc. Direct current (DC) and/or alternating current (AC) load detection for audio codec
US9800984B2 (en) 2016-02-22 2017-10-24 Cirrus Logic, Inc. Identification of a load with a search algorithm that controls application of signals to the load and a reference generator
US10015607B2 (en) 2016-02-22 2018-07-03 Cirrus Logic, Inc. Temperature compensation for load identification
US9712906B1 (en) 2016-02-22 2017-07-18 Cirrus Logic, Inc. Alternating current (AC) load identification technique using a search algorithm
WO2017222554A1 (en) * 2016-06-24 2017-12-28 Cirrus Logic International Semiconductor Ltd. Temperature compensation for load identification
CN108336894B (en) * 2018-04-20 2023-03-28 吉林大学 Device for improving signal-to-noise ratio of output signal of photomultiplier and control method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10327026A (en) * 1997-05-23 1998-12-08 Nippon Columbia Co Ltd Amplifier
EP1118865A1 (en) * 2000-01-20 2001-07-25 STMicroelectronics S.r.l. Circuit and method for detecting load impedance
JP2002151974A (en) * 2000-11-14 2002-05-24 Ari:Kk Pulse width modulation amplifier
US20080144861A1 (en) * 2006-12-13 2008-06-19 Melanson John L Method and apparatus for controlling a selectable voltage audio power output stage
JP2008294803A (en) * 2007-05-25 2008-12-04 Kenwood Corp Reproducing device, and reproducing method
GB2465695A (en) * 2007-12-28 2010-06-02 Wolfson Microelectronics Plc A load discriminator for an audio amplifier, the discriminator not using a test signal
US20100194413A1 (en) * 2007-07-16 2010-08-05 Lab.Gruppen Ab Method of determining an impedance function of a loudspeaker
US7808324B1 (en) * 2009-03-17 2010-10-05 Cirrus Logic, Inc. Operating environment and process position selected charge-pump operating mode in an audio power amplifier integrated circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960614A (en) 1987-02-06 1990-10-02 Key-Tech, Inc. Printed circuit board

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10327026A (en) * 1997-05-23 1998-12-08 Nippon Columbia Co Ltd Amplifier
EP1118865A1 (en) * 2000-01-20 2001-07-25 STMicroelectronics S.r.l. Circuit and method for detecting load impedance
JP2002151974A (en) * 2000-11-14 2002-05-24 Ari:Kk Pulse width modulation amplifier
US20080144861A1 (en) * 2006-12-13 2008-06-19 Melanson John L Method and apparatus for controlling a selectable voltage audio power output stage
JP2008294803A (en) * 2007-05-25 2008-12-04 Kenwood Corp Reproducing device, and reproducing method
US20100194413A1 (en) * 2007-07-16 2010-08-05 Lab.Gruppen Ab Method of determining an impedance function of a loudspeaker
GB2465695A (en) * 2007-12-28 2010-06-02 Wolfson Microelectronics Plc A load discriminator for an audio amplifier, the discriminator not using a test signal
US7808324B1 (en) * 2009-03-17 2010-10-05 Cirrus Logic, Inc. Operating environment and process position selected charge-pump operating mode in an audio power amplifier integrated circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KRZYSZTOF SOZANSKI: "DIGITAL CORRECTION FILTERS FOR SUBWOOFER LOUDSPEAKERSYSTEMS WITH ACOUSTIC DIPOLES", AUDIO ENGINEERING SOCIETY, 4, 21 September 2007 (2007-09-21) - 23 September 2007 (2007-09-23), Hilleröd, Denmark, pages 1 - 7, XP040374690 *

Also Published As

Publication number Publication date
WO2015039002A2 (en) 2015-03-19
WO2015039002A4 (en) 2015-08-13

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