DE60105819D1 - A/d umwandler mit integrierter vorspannung für mikrofon - Google Patents

A/d umwandler mit integrierter vorspannung für mikrofon

Info

Publication number
DE60105819D1
DE60105819D1 DE60105819T DE60105819T DE60105819D1 DE 60105819 D1 DE60105819 D1 DE 60105819D1 DE 60105819 T DE60105819 T DE 60105819T DE 60105819 T DE60105819 T DE 60105819T DE 60105819 D1 DE60105819 D1 DE 60105819D1
Authority
DE
Germany
Prior art keywords
microphone
converter
feedback loop
fet
integrated tension
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.)
Expired - Lifetime
Application number
DE60105819T
Other languages
English (en)
Other versions
DE60105819T2 (de
Inventor
C Dijkmans
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Publication of DE60105819D1 publication Critical patent/DE60105819D1/de
Application granted granted Critical
Publication of DE60105819T2 publication Critical patent/DE60105819T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M3/352—Continuously compensating for, or preventing, undesired influence of physical parameters of deviations from the desired transfer characteristic
    • H03M3/354—Continuously compensating for, or preventing, undesired influence of physical parameters of deviations from the desired transfer characteristic at one point, i.e. by adjusting a single reference value, e.g. bias or gain error
    • H03M3/356—Offset or drift compensation
    • 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
    • H04R19/01—Electrostatic transducers characterised by the use of electrets
    • H04R19/016—Electrostatic transducers characterised by the use of electrets for microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/412—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution
    • H03M3/422—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only
    • H03M3/43—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the number of quantisers and their type and resolution having one quantiser only the quantiser being a single bit one
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/39—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators
    • H03M3/436—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type
    • H03M3/456—Structural details of delta-sigma modulators, e.g. incremental delta-sigma modulators characterised by the order of the loop filter, e.g. error feedback type the modulator having a first order loop filter in the feedforward path
    • 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
DE60105819T 2000-07-05 2001-06-25 A/d umwandler mit integrierter vorspannung für mikrofon Expired - Lifetime DE60105819T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00202381 2000-07-05
EP00202381 2000-07-05
PCT/EP2001/007191 WO2002003747A2 (en) 2000-07-05 2001-06-25 A/d converter with integrated biasing for a microphone

Publications (2)

Publication Number Publication Date
DE60105819D1 true DE60105819D1 (de) 2004-10-28
DE60105819T2 DE60105819T2 (de) 2005-10-06

Family

ID=8171758

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60105819T Expired - Lifetime DE60105819T2 (de) 2000-07-05 2001-06-25 A/d umwandler mit integrierter vorspannung für mikrofon

Country Status (7)

Country Link
US (1) US7489791B2 (de)
EP (1) EP1304016B1 (de)
JP (1) JP4880176B2 (de)
KR (1) KR20020059389A (de)
AT (1) ATE277490T1 (de)
DE (1) DE60105819T2 (de)
WO (1) WO2002003747A2 (de)

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* Cited by examiner, † Cited by third party
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US20020106091A1 (en) 2001-02-02 2002-08-08 Furst Claus Erdmann Microphone unit with internal A/D converter
GB2386280B (en) * 2002-03-07 2005-09-14 Zarlink Semiconductor Inc Digital microphone
KR20040036027A (ko) * 2002-10-23 2004-04-30 주식회사 비에스이 일렉트렛 콘덴서 마이크로폰
US20040179706A1 (en) * 2003-03-11 2004-09-16 Van Oerle Gerard Microphone devices
JP2007508755A (ja) * 2003-10-14 2007-04-05 オーディオアシクス エー／エス マイクロフォン前置増幅器
EP1690332A1 (de) 2003-12-01 2006-08-16 Audioasics A/S Mikrofon mit spannungspumpe
JP2007526712A (ja) * 2004-03-02 2007-09-13 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 入力信号に依存する信号状態
US7356151B2 (en) * 2004-03-30 2008-04-08 Akg Acoustic Gmbh Microphone system
US7009541B1 (en) * 2004-10-21 2006-03-07 Analog Devices, Inc. Input common-mode voltage feedback circuit for continuous-time sigma-delta analog-to-digital converter
CN101288337B (zh) * 2005-07-19 2012-11-21 美国亚德诺半导体公司 可编程麦克风
JP4512028B2 (ja) * 2005-11-28 2010-07-28 日本電信電話株式会社 送話装置
US7679443B2 (en) * 2006-08-31 2010-03-16 Texas Instruments Incorporated System and method for common mode translation
US8243956B2 (en) * 2007-08-13 2012-08-14 Gentex Corporation Auto bias microphone system for use with multiple loads and method of forming same
US8335328B2 (en) * 2007-10-24 2012-12-18 Winbond Electronics Corporation Programmable integrated microphone interface circuit
JP4905379B2 (ja) * 2008-02-07 2012-03-28 横河電機株式会社 デルタシグマ型ａ／ｄコンバータ
GB2459862B (en) * 2008-05-07 2010-06-30 Wolfson Microelectronics Plc Capacitive transducer circuit and method
EP2141814B1 (de) 2008-07-01 2011-11-16 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Delta-Sigma Analog-zu-Digital-Wandler, Funkempfänger, Kommunikationsvorrichtung, Verfahren und Computerprogramm
WO2010021803A2 (en) * 2008-08-21 2010-02-25 Gentex Corporation Two wire autobias vehicular microphone system having user input functionality and method of forming same
DE102009000950A1 (de) 2009-02-02 2010-08-05 Robert Bosch Gmbh Bauelement mit einer mikromechanischen Mikrofonstruktur und Verfahren zum Betreiben eines solchen Mikrofonbauelements
EP2421281A3 (de) * 2010-08-17 2012-04-04 Nxp B.V. Schaltung und Verfahren zur Überwachung einer kapazitativen Signalquelle
TW201218644A (en) * 2010-10-26 2012-05-01 Ping-Ying Wang Voltage converter
US9236837B2 (en) * 2011-08-25 2016-01-12 Infineon Technologies Ag System and method for low distortion capacitive signal source amplifier
US10028054B2 (en) 2013-10-21 2018-07-17 Knowles Electronics, Llc Apparatus and method for frequency detection
US10020008B2 (en) 2013-05-23 2018-07-10 Knowles Electronics, Llc Microphone and corresponding digital interface
US20180317019A1 (en) 2013-05-23 2018-11-01 Knowles Electronics, Llc Acoustic activity detecting microphone
WO2014189931A1 (en) * 2013-05-23 2014-11-27 Knowles Electronics, Llc Vad detection microphone and method of operating the same
DE102013218973B4 (de) * 2013-09-20 2015-11-19 Albert-Ludwigs-Universität Freiburg Verfahren und Schaltung zur zeitkontinuierlichen Detektion der Position der Sensormasse bei gleichzeitiger Rückkopplung für kapazitive Sensoren
DE112016000287T5 (de) 2015-01-07 2017-10-05 Knowles Electronics, Llc Verwendung von digitalen Mikrofonen zur Niedrigleistung-Schlüsselworterkennung und Rauschunterdrückung
US9780801B2 (en) 2015-09-16 2017-10-03 Semiconductor Components Industries, Llc Low-power conversion between analog and digital signals using adjustable feedback filter
EP3340654A1 (de) 2016-12-20 2018-06-27 Widex A/S Integrierte schaltungskomponente für eine hörhilfevorrichtung
US10080082B2 (en) * 2017-02-16 2018-09-18 Akustica, Inc. Microphone system having high acoustical overload point
EP3855129B1 (de) 2017-03-22 2023-10-25 Knowles Electronics, LLC Interface schaltkreis für einen kapazitiven sensor
CN112335262B (zh) * 2018-06-19 2021-12-28 美商楼氏电子有限公司 麦克风组件、半导体管芯和降低麦克风的噪声的方法
WO2019246151A1 (en) 2018-06-19 2019-12-26 Knowles Electronics, Llc Transconductance amplifier
JP7088785B2 (ja) * 2018-08-28 2022-06-21 日清紡マイクロデバイス株式会社 デジタルマイクロホン

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3048452B2 (ja) * 1990-11-30 2000-06-05 株式会社東芝 Ａｄ変換器
JP3048263B2 (ja) * 1991-09-02 2000-06-05 株式会社日立製作所 アナログ／ディジタル変換器
JP2734265B2 (ja) * 1991-12-12 1998-03-30 日本電気株式会社 エレクトレット・コンデンサ・マイクロフォン用増幅回路
US5471209A (en) * 1994-03-03 1995-11-28 Echelon Corporation Sigma-delta converter having a digital logic gate core
DE4441996A1 (de) 1994-11-26 1996-05-30 Toepholm & Westermann Hörhilfsgerät
US5614904A (en) * 1995-03-09 1997-03-25 Ericsson Inc. Balance companded delta conversion for homodyne receiver
US5832076A (en) * 1996-08-07 1998-11-03 Transcrypt International, Inc. Apparatus and method for determining the presence and polarity of direct current bias voltage for microphones in telephone sets
US5978491A (en) * 1996-11-21 1999-11-02 Vxi Corporation Circuitry for improving performance of electret microphone
DK0943225T3 (da) * 1996-12-11 2001-08-13 Gn Netcom As Strømforsyning til mikrofon
US6285769B1 (en) * 1997-04-10 2001-09-04 Borealis Technical Limited Force balance microphone
GB2330725B (en) * 1997-10-24 2001-08-15 Sony Uk Ltd Microphone
DE19814180C1 (de) * 1998-03-30 1999-10-07 Siemens Audiologische Technik Digitales Hörgerät sowie Verfahren zur Erzeugung einer variablen Richtmikrofoncharakteristik
US6456219B1 (en) * 2000-02-22 2002-09-24 Texas Instruments Incorporated Analog-to-digital converter including two-wire interface circuit
US6853733B1 (en) * 2003-06-18 2005-02-08 National Semiconductor Corporation Two-wire interface for digital microphones

Also Published As

Publication number Publication date
US7489791B2 (en) 2009-02-10
ATE277490T1 (de) 2004-10-15
JP4880176B2 (ja) 2012-02-22
WO2002003747A3 (en) 2002-04-25
KR20020059389A (ko) 2002-07-12
EP1304016A2 (de) 2003-04-23
WO2002003747A2 (en) 2002-01-10
US20020071578A1 (en) 2002-06-13
DE60105819T2 (de) 2005-10-06
JP2004502391A (ja) 2004-01-22
EP1304016B1 (de) 2004-09-22

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Legal Events

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