DE69506727T2 - Geräuscharme verstärker für mikrofon - Google Patents

Geräuscharme verstärker für mikrofon

Info

Publication number
DE69506727T2
DE69506727T2 DE69506727T DE69506727T DE69506727T2 DE 69506727 T2 DE69506727 T2 DE 69506727T2 DE 69506727 T DE69506727 T DE 69506727T DE 69506727 T DE69506727 T DE 69506727T DE 69506727 T2 DE69506727 T2 DE 69506727T2
Authority
DE
Germany
Prior art keywords
microphones
silent
amplifiers
silent amplifiers
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 - Fee Related
Application number
DE69506727T
Other languages
English (en)
Other versions
DE69506727D1 (de
Inventor
Peter Madaffari
James Collins
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.)
Tibbetts Industries Inc
Original Assignee
Tibbetts Industries 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
Application filed by Tibbetts Industries Inc filed Critical Tibbetts Industries Inc
Publication of DE69506727D1 publication Critical patent/DE69506727D1/de
Application granted granted Critical
Publication of DE69506727T2 publication Critical patent/DE69506727T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H03F3/1855—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only with field-effect devices with junction-FET 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
    • H03F2200/372—Noise reduction and elimination in amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/54—Two or more capacitor coupled amplifier stages in cascade
    • 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
    • H04R25/50—Customised settings for obtaining desired overall acoustical characteristics
    • H04R25/502—Customised settings for obtaining desired overall acoustical characteristics using analog signal processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
DE69506727T 1994-09-29 1995-09-19 Geräuscharme verstärker für mikrofon Expired - Fee Related DE69506727T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US31469494A 1994-09-29 1994-09-29
US08/447,349 US5589799A (en) 1994-09-29 1995-05-23 Low noise amplifier for microphone
PCT/US1995/011838 WO1996010291A1 (en) 1994-09-29 1995-09-19 Low noise amplifier for microphone

Publications (2)

Publication Number Publication Date
DE69506727D1 DE69506727D1 (de) 1999-01-28
DE69506727T2 true DE69506727T2 (de) 1999-06-10

Family

ID=26979502

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69506727T Expired - Fee Related DE69506727T2 (de) 1994-09-29 1995-09-19 Geräuscharme verstärker für mikrofon

Country Status (6)

Country Link
US (1) US5589799A (de)
EP (1) EP0783795B1 (de)
AU (1) AU3591395A (de)
DE (1) DE69506727T2 (de)
DK (1) DK0783795T3 (de)
WO (1) WO1996010291A1 (de)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023194A (en) * 1997-05-23 2000-02-08 Tibbetts Industries, Inc. Amplifier with reduced input capacitance
JP2904200B2 (ja) * 1997-11-04 1999-06-14 日本電気株式会社 固体撮像素子
NL1009544C2 (nl) * 1998-07-02 2000-01-10 Microtronic Nederland Bv Stelsel bestaande uit een microfoon en een voorversterker.
JP2002534933A (ja) * 1999-01-07 2002-10-15 サーノフ コーポレイション プリント回路基板を有する大型ダイアフラムマイクロフォン素子を備えた補聴器
US7003127B1 (en) 1999-01-07 2006-02-21 Sarnoff Corporation Hearing aid with large diaphragm microphone element including a printed circuit board
JP3665711B2 (ja) * 1999-02-25 2005-06-29 富士通株式会社 高周波増幅器および増幅素子
NL1011778C1 (nl) 1999-04-13 2000-10-16 Microtronic Nederland Bv Microfoon voor een hoorapparaat en een hoorapparaat voorzien van een dergelijke microfoon.
US6353344B1 (en) 2000-05-22 2002-03-05 Microtronic Us, Inc. High impedance bias circuit
US6577187B1 (en) 2000-06-15 2003-06-10 Upstate Audio Powered transducer preamplifier with DC level shifting circuit
AU2002237204A1 (en) * 2001-03-09 2002-09-24 Techtronic A/S An electret condensor microphone preamplifier that is insensitive to leakage currents at the input
ATE316711T1 (de) * 2001-03-26 2006-02-15 Neumann Gmbh Georg Verstärkerschaltung
US7072478B2 (en) * 2001-09-24 2006-07-04 Taylor Hohendahl Engineering Llp Microphone preamplifier
US7092538B2 (en) * 2002-04-15 2006-08-15 Knowles Electronics, Llc Switched microphone buffer
US7221766B2 (en) * 2002-04-15 2007-05-22 Knowles Electronics, Llc Microphone input buffer biasing circuit
US7149317B2 (en) 2002-04-18 2006-12-12 Sonionmicrotronic Nederland B.V. CMOS high impedance circuit
US7688987B2 (en) * 2002-04-24 2010-03-30 Knowles Electronics, Llc Electret microphone buffer circuit with significantly enhanced power supply rejection
US6888408B2 (en) * 2002-08-27 2005-05-03 Sonion Tech A/S Preamplifier for two terminal electret condenser microphones
US7463744B2 (en) 2003-10-31 2008-12-09 Bose Corporation Porting
US7787643B2 (en) * 2004-11-24 2010-08-31 Mwm Acoustics, Llc System and method for RF immunity of electret condenser microphone
US7978863B2 (en) * 2006-06-26 2011-07-12 Nokia Corporation Apparatus and method to provide advanced microphone bias
TWI339007B (en) * 2006-11-21 2011-03-11 Ind Tech Res Inst Design method of low frequency analog circuit and low frequency analog circuit using the same
JP2009225100A (ja) * 2008-03-17 2009-10-01 Nec Electronics Corp 半導体集積回路及びコンデンサ・マイクロフォン
US8433090B1 (en) * 2009-10-09 2013-04-30 Cloud Microphones, Inc. Ribbon microphone with rounded magnet motor assembly, backwave chamber, and phantom powered JFET circuit
EP2461605A1 (de) * 2010-12-06 2012-06-06 Research In Motion Limited Differentialmikrofonschaltung
US8750537B2 (en) 2010-12-06 2014-06-10 Blackberry Limited Differential microphone circuit
US9590571B2 (en) * 2012-10-02 2017-03-07 Knowles Electronics, Llc Single stage buffer with filter
US9608437B2 (en) * 2013-09-12 2017-03-28 Qualcomm Incorporated Electro-static discharge protection for integrated circuits
US9961440B2 (en) * 2013-12-25 2018-05-01 Wizedsp Ltd. Systems and methods for using electrostatic microphone
CN107636957A (zh) * 2015-05-20 2018-01-26 怀斯迪斯匹有限公司 超低功率和低噪声放大器
CN107231140B (zh) * 2017-06-07 2020-12-04 广州致远电子有限公司 一种阻抗变换网络电路结构

Family Cites Families (11)

* 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
JPS4890447A (de) * 1972-03-02 1973-11-26
CA1024239A (en) * 1972-04-17 1978-01-10 Rca Limited Low noise detector amplifier
US3927383A (en) * 1972-04-21 1975-12-16 Rca Corp Low noise wide band transducer system
US4063050A (en) * 1976-12-30 1977-12-13 Industrial Research Products, Inc. Acoustic transducer with improved electret assembly
FR2640444B1 (de) * 1988-12-09 1991-03-15 Labo Electronique Physique
JPH0340533A (ja) * 1989-07-06 1991-02-21 Sumitomo Electric Ind Ltd 復調回路
AT407815B (de) * 1990-07-13 2001-06-25 Viennatone Gmbh Hörgerät
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
US5337011A (en) * 1992-12-14 1994-08-09 Knowles Electronics, Inc. Pre-amplifier

Also Published As

Publication number Publication date
US5589799A (en) 1996-12-31
EP0783795B1 (de) 1998-12-16
EP0783795A1 (de) 1997-07-16
DK0783795T3 (da) 1999-08-23
DE69506727D1 (de) 1999-01-28
AU3591395A (en) 1996-04-19
WO1996010291A1 (en) 1996-04-04

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee