DK1355417T3 - Indgangsbufferforspændingskredslöb til en mikrofon - Google Patents

Indgangsbufferforspændingskredslöb til en mikrofon

Info

Publication number
DK1355417T3
DK1355417T3 DK03252383T DK03252383T DK1355417T3 DK 1355417 T3 DK1355417 T3 DK 1355417T3 DK 03252383 T DK03252383 T DK 03252383T DK 03252383 T DK03252383 T DK 03252383T DK 1355417 T3 DK1355417 T3 DK 1355417T3
Authority
DK
Denmark
Prior art keywords
microphone
input buffer
bias circuit
buffer bias
circuit
Prior art date
Application number
DK03252383T
Other languages
English (en)
Inventor
Steven E Boor
Original Assignee
Knowles Electronics Llc
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 Knowles Electronics Llc filed Critical Knowles Electronics Llc
Application granted granted Critical
Publication of DK1355417T3 publication Critical patent/DK1355417T3/da

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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/301—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in MOSFET 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
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/523—Circuit arrangements for protecting such amplifiers for amplifiers using field-effect devices
    • 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
    • H03F3/185—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/18—Indexing scheme relating to amplifiers the bias of the gate of a FET being controlled by a control signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
DK03252383T 2002-04-15 2003-04-15 Indgangsbufferforspændingskredslöb til en mikrofon DK1355417T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37254702P 2002-04-15 2002-04-15

Publications (1)

Publication Number Publication Date
DK1355417T3 true DK1355417T3 (da) 2007-02-19

Family

ID=28675596

Family Applications (1)

Application Number Title Priority Date Filing Date
DK03252383T DK1355417T3 (da) 2002-04-15 2003-04-15 Indgangsbufferforspændingskredslöb til en mikrofon

Country Status (4)

Country Link
US (1) US7221766B2 (da)
EP (1) EP1355417B1 (da)
DE (1) DE60309092T2 (da)
DK (1) DK1355417T3 (da)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1553696B1 (en) * 2004-01-12 2008-10-08 Sonion A/S Amplifier circuit for capacitive transducers
TWI327032B (en) * 2006-12-29 2010-07-01 Ind Tech Res Inst Alternative sensing circuit for mems microphone and sensing method therefor
US8401208B2 (en) * 2007-11-14 2013-03-19 Infineon Technologies Ag Anti-shock methods for processing capacitive sensor signals
DE102008032852A1 (de) * 2008-07-14 2010-01-21 T-Mobile International Ag Kommunikationsgerät mit Funktionalität einer Hörhilfe
CN101924525B (zh) * 2009-06-11 2016-06-22 应美盛股份有限公司 高性能音频放大电路
US9071214B2 (en) * 2009-06-11 2015-06-30 Invensense, Inc. Audio signal controller
US9083288B2 (en) * 2009-06-11 2015-07-14 Invensense, Inc. High level capable audio amplification circuit
US8644529B2 (en) 2009-10-13 2014-02-04 Cad Audio, Llc Fully differential low-noise capacitor microphone circuit
US9559647B2 (en) 2012-05-21 2017-01-31 Epcos Ag Amplifier circuit
US9590571B2 (en) 2012-10-02 2017-03-07 Knowles Electronics, Llc Single stage buffer with filter
US9402131B2 (en) 2013-10-30 2016-07-26 Knowles Electronics, Llc Push-pull microphone buffer
US9485594B2 (en) 2014-08-06 2016-11-01 Knowles Electronics, Llc Connector arrangement in hearing instruments
US9859879B2 (en) 2015-09-11 2018-01-02 Knowles Electronics, Llc Method and apparatus to clip incoming signals in opposing directions when in an off state
US20180145643A1 (en) 2016-11-18 2018-05-24 Sonion Nederland B.V. Circuit for providing a high and a low impedance and a system comprising the circuit
EP3324538A1 (en) 2016-11-18 2018-05-23 Sonion Nederland B.V. A sensing circuit comprising an amplifying circuit
US10327072B2 (en) 2016-11-18 2019-06-18 Sonion Nederland B.V. Phase correcting system and a phase correctable transducer system
EP3324649A1 (en) 2016-11-18 2018-05-23 Sonion Nederland B.V. A transducer with a high sensitivity
US11115744B2 (en) 2018-04-02 2021-09-07 Knowles Electronics, Llc Audio device with conduit connector
US11536757B2 (en) 2020-06-19 2022-12-27 Knowles Electronics, Llc Capacitive sensor assemblies and electrical circuits therefor
KR102404283B1 (ko) * 2022-02-15 2022-06-02 (주)에프와이디 마이크로폰 센서용 리드아웃 회로

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512100A (en) * 1968-07-03 1970-05-12 Intern Research Products Inc Audio frequency amplification circuit
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly
US5083095A (en) * 1990-08-22 1992-01-21 Knowles Electronics, Inc. Plural source follower amplifier
US5097224A (en) * 1991-04-11 1992-03-17 Telex Communications, Inc. Self-biasing, low noise amplifier of extended dynamic range
US5589799A (en) * 1994-09-29 1996-12-31 Tibbetts Industries, Inc. Low noise amplifier for microphone
US6023194A (en) 1997-05-23 2000-02-08 Tibbetts Industries, Inc. Amplifier with reduced input capacitance
NL1009544C2 (nl) 1998-07-02 2000-01-10 Microtronic Nederland Bv Stelsel bestaande uit een microfoon en een voorversterker.
DE69902889D1 (de) 1999-06-15 2002-10-17 St Microelectronics Srl Spannungsgesteuerte Treiberstufe mit geregeltem Strom

Also Published As

Publication number Publication date
US7221766B2 (en) 2007-05-22
EP1355417A1 (en) 2003-10-22
DE60309092T2 (de) 2007-06-06
DE60309092D1 (de) 2006-11-30
US20030194100A1 (en) 2003-10-16
EP1355417B1 (en) 2006-10-18

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