EP0096778A3 - Microphone - Google Patents

Microphone Download PDF

Info

Publication number
EP0096778A3
EP0096778A3 EP83105247A EP83105247A EP0096778A3 EP 0096778 A3 EP0096778 A3 EP 0096778A3 EP 83105247 A EP83105247 A EP 83105247A EP 83105247 A EP83105247 A EP 83105247A EP 0096778 A3 EP0096778 A3 EP 0096778A3
Authority
EP
European Patent Office
Prior art keywords
voltage
microphone
amplifier
output
chopper
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
EP83105247A
Other languages
German (de)
Other versions
EP0096778B1 (en
EP0096778A2 (en
Inventor
Otmar Dipl.-Ing. Kern
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.)
Georg Neumann GmbH
Original Assignee
Georg Neumann GmbH
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
Application filed by Georg Neumann GmbH filed Critical Georg Neumann GmbH
Priority to AT83105247T priority Critical patent/ATE36629T1/en
Publication of EP0096778A2 publication Critical patent/EP0096778A2/en
Publication of EP0096778A3 publication Critical patent/EP0096778A3/en
Application granted granted Critical
Publication of EP0096778B1 publication Critical patent/EP0096778B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Dc-Dc Converters (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

An electroacoustic transducer system comprises a microphone working into a low-frequency amplifier for the energization of an a-c load such as, for example, a loudspeaker or a volume indicator at a control panel. Biasing voltage for the microphone and operating current for the amplifier are derived from a d-c source, via a phantom circuit including the output leads of the amplifier and through a coupler in cascade with a chopper; the latter includes a transistor conducting intermittently under the control of an adjustable pulse generator whose pulse width is varied by negative feedback from the integrated chopper output. An output transformer with a primary in series with the transistor has several secondaries each connected across a storage capacitor through a diode for the generation of a relatively high biasing voltage for the microphone, a relatively low driving voltage for the amplifier and, possibly, a further voltage used to vary the directional pattern of the microphone. To facilitate the establishment of different voltage levels, the development of the lower voltage is delayed-by the combination of a choke with a Zener diode, or by a thyristor-until the higher voltage has been reached by a transient occurring at the beginning of each cutoff phase.
EP83105247A 1982-06-14 1983-05-26 Microphone Expired EP0096778B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105247T ATE36629T1 (en) 1982-06-14 1983-05-26 MICROPHONE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3222295 1982-06-14
DE3222295 1982-06-14

Publications (3)

Publication Number Publication Date
EP0096778A2 EP0096778A2 (en) 1983-12-28
EP0096778A3 true EP0096778A3 (en) 1985-12-04
EP0096778B1 EP0096778B1 (en) 1988-08-17

Family

ID=6166020

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105247A Expired EP0096778B1 (en) 1982-06-14 1983-05-26 Microphone

Country Status (4)

Country Link
US (1) US4541112A (en)
EP (1) EP0096778B1 (en)
AT (1) ATE36629T1 (en)
DE (1) DE3377765D1 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2734265B2 (en) * 1991-12-12 1998-03-30 日本電気株式会社 Amplifier circuit for electret condenser microphone
US5377273A (en) * 1992-03-26 1994-12-27 Hewlett-Packard Company Batteryless power supply for transducers
JP3556953B2 (en) 1996-12-11 2004-08-25 ゲ・エヌ・ネトコム・アクティーゼルスカブ Power supply for microphone
JP3890301B2 (en) * 2003-01-15 2007-03-07 株式会社オーディオテクニカ Condenser microphone
US7391873B2 (en) * 2003-12-01 2008-06-24 Audioasics A/S Microphone with voltage pump
EP1585359B1 (en) * 2004-03-30 2017-10-04 AKG Acoustics GmbH Remote control of phantom power supplied microphones
US7356151B2 (en) 2004-03-30 2008-04-08 Akg Acoustic Gmbh Microphone system
EP1585360B1 (en) * 2004-03-30 2017-05-10 AKG Acoustics GmbH Power supply of phantom power supplied microphones
EP1585365B1 (en) * 2004-03-30 2011-08-10 AKG Acoustics GmbH Polarization voltage setting of microphones
JP4304118B2 (en) * 2004-04-22 2009-07-29 株式会社オーディオテクニカ Microphone output connector
JP4579778B2 (en) * 2004-08-17 2010-11-10 ルネサスエレクトロニクス株式会社 Sensor power supply circuit and microphone unit using the same
DE102005007623A1 (en) * 2005-02-18 2006-08-31 Robert Bosch Gmbh microphone
DE102008022588A1 (en) 2007-05-09 2008-11-27 Henrik Blanchard Externally polarized condenser microphone i.e. high-quality sound receiver, for use in e.g. professional studio technology, has control amplifier separated from buffer amplifier to compare capsule voltage with preset reference value
DE102010000686B4 (en) * 2010-01-05 2018-05-09 Sennheiser Electronic Gmbh & Co. Kg condenser microphone
DE102010054895B4 (en) 2010-12-17 2018-10-31 Austriamicrosystems Ag microphone amplifier
US9544027B2 (en) * 2014-02-19 2017-01-10 Texas Instruments Incorporated Loop powered transmitter with a single tap data isolation transformer and unipolar voltage converters
WO2018053498A1 (en) 2016-09-19 2018-03-22 Chandler Limited, Inc. Microphone system for direct coupling to recording devices
CN112217482B (en) * 2020-08-31 2024-02-13 湖南大学 Electroacoustic transduction system and impedance matching control method thereof
CN114040301B (en) * 2021-11-15 2024-02-27 歌尔微电子股份有限公司 Microphone quick start circuit, microphone chip and microphone

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126385A1 (en) * 1970-06-08 1971-12-16 Akg Akusteische U Kino Geraete Capacitive sound receiver
US4122514A (en) * 1976-11-01 1978-10-24 Hewlett-Packard Company Direct current power supply

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240128B (en) * 1964-08-01 1967-05-11 Sennheiser Electronic High-frequency capacitor microphone with an oscillator and a coupled resonant circuit that is tuned to its frequency and whose capacitance is formed by the transducer element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2126385A1 (en) * 1970-06-08 1971-12-16 Akg Akusteische U Kino Geraete Capacitive sound receiver
US4122514A (en) * 1976-11-01 1978-10-24 Hewlett-Packard Company Direct current power supply

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FUNKSCHAU, Band 41, Nr. 10, 2. Mai 1969, Seite 900, München, DE; F. KÜHNE: "Elektret-Kondensatormikrofone" *
RADIO MENTOR, Band 33, Nr. 7, Juli 1967, Seiten 528-532, Berlin, DE; G. BORE: "Transistorbestückte Kondensator-Mikrofone in Niederfrequenz-Schaltung"Seite 531, linke Spalte, Zeile 27 - Seite 532, linke Spalte, Zeile 48; Figuren 8-12 *

Also Published As

Publication number Publication date
US4541112A (en) 1985-09-10
DE3377765D1 (en) 1988-09-22
ATE36629T1 (en) 1988-09-15
EP0096778B1 (en) 1988-08-17
EP0096778A2 (en) 1983-12-28

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