JP4227679B2 - インピーダンス変換器 - Google Patents

インピーダンス変換器 Download PDF

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Publication number
JP4227679B2
JP4227679B2 JP12439998A JP12439998A JP4227679B2 JP 4227679 B2 JP4227679 B2 JP 4227679B2 JP 12439998 A JP12439998 A JP 12439998A JP 12439998 A JP12439998 A JP 12439998A JP 4227679 B2 JP4227679 B2 JP 4227679B2
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JP
Japan
Prior art keywords
diode
voltage
grid
triode
bias
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
JP12439998A
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English (en)
Japanese (ja)
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JPH11317996A (ja
JPH11317996A5 (enExample
Inventor
裕 秋野
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.)
Audio Technica KK
Original Assignee
Audio Technica KK
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 Audio Technica KK filed Critical Audio Technica KK
Priority to JP12439998A priority Critical patent/JP4227679B2/ja
Priority to US09/299,851 priority patent/US6453048B1/en
Publication of JPH11317996A publication Critical patent/JPH11317996A/ja
Publication of JPH11317996A5 publication Critical patent/JPH11317996A5/ja
Application granted granted Critical
Publication of JP4227679B2 publication Critical patent/JP4227679B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Amplifiers (AREA)
JP12439998A 1998-05-07 1998-05-07 インピーダンス変換器 Expired - Fee Related JP4227679B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP12439998A JP4227679B2 (ja) 1998-05-07 1998-05-07 インピーダンス変換器
US09/299,851 US6453048B1 (en) 1998-05-07 1999-04-26 Impedance converter for a condenser microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12439998A JP4227679B2 (ja) 1998-05-07 1998-05-07 インピーダンス変換器

Publications (3)

Publication Number Publication Date
JPH11317996A JPH11317996A (ja) 1999-11-16
JPH11317996A5 JPH11317996A5 (enExample) 2005-09-29
JP4227679B2 true JP4227679B2 (ja) 2009-02-18

Family

ID=14884486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12439998A Expired - Fee Related JP4227679B2 (ja) 1998-05-07 1998-05-07 インピーダンス変換器

Country Status (2)

Country Link
US (1) US6453048B1 (enExample)
JP (1) JP4227679B2 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017118167A (ja) * 2015-12-21 2017-06-29 株式会社オーディオテクニカ コンデンサマイクロホン
US9893691B2 (en) 2015-12-25 2018-02-13 Kabushiki Kaisha Audio-Technica Impedance converter and condenser microphone

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4057212B2 (ja) * 2000-02-15 2008-03-05 三菱電機株式会社 マイクロフォン装置
FI109641B (fi) * 2000-03-10 2002-09-13 Nokia Corp Mikrofonirakenne
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
JP3890301B2 (ja) * 2003-01-15 2007-03-07 株式会社オーディオテクニカ コンデンサマイクロホン
JP4426902B2 (ja) * 2004-05-14 2010-03-03 株式会社オーディオテクニカ コンデンサマイクロホン
US7929716B2 (en) 2005-01-06 2011-04-19 Renesas Electronics Corporation Voltage supply circuit, power supply circuit, microphone unit using the same, and microphone unit sensitivity adjustment method
JP4440121B2 (ja) 2005-01-06 2010-03-24 Ｎｅｃエレクトロニクス株式会社 電圧供給回路およびマイクユニット
JP2006245740A (ja) * 2005-03-01 2006-09-14 Sanyo Electric Co Ltd 増幅回路及びこれを用いたエレクトレットコンデンサマイクロフォン
US20070229123A1 (en) * 2006-03-30 2007-10-04 Chien-Chin Hsiao Semiconductor device for microphone applications
JP4764234B2 (ja) * 2006-04-07 2011-08-31 株式会社東芝 インピーダンス変換回路及び電子機器
JP2008147806A (ja) * 2006-12-07 2008-06-26 Audio Technica Corp コンデンサマイクロホンおよびその製造方法
WO2009025090A1 (ja) * 2007-08-22 2009-02-26 Panasonic Corporation 指向性マイクロホン装置
US8401208B2 (en) * 2007-11-14 2013-03-19 Infineon Technologies Ag Anti-shock methods for processing capacitive sensor signals
JP5060980B2 (ja) * 2008-01-31 2012-10-31 株式会社オーディオテクニカ コンデンサマイクロホンユニットおよびその固定極
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
JP5201594B2 (ja) * 2009-04-24 2013-06-05 株式会社オーディオテクニカ コンデンサマイクロホンおよびそのインピーダンス変換器
JP5201596B2 (ja) * 2009-05-22 2013-06-05 株式会社オーディオテクニカ マイクロホン用インピーダンス変換器およびマイクロホン
US8253471B2 (en) * 2009-10-09 2012-08-28 Fairchild Semiconductor Corporation High impedance bias network
JP5631256B2 (ja) * 2011-04-25 2014-11-26 株式会社オーディオテクニカ コンデンサマイクロホンユニットおよびコンデンサマイクロホン
JP5967823B2 (ja) * 2012-10-24 2016-08-10 株式会社オーディオテクニカ 可変指向性コンデンサマイクロホン
JP6667379B2 (ja) * 2016-06-16 2020-03-18 株式会社オーディオテクニカ マイクロホンの電源装置
CN110690282B (zh) * 2019-08-23 2022-10-18 福建省福联集成电路有限公司 一种基于晶体管的电阻结构及其制作方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193198A (en) * 1981-05-22 1982-11-27 Toshiba Corp Electrostatic microphone
US4629910A (en) * 1982-04-21 1986-12-16 At&T Bell Laboratories High input impedance circuit
SE452083C (sv) * 1983-02-25 1991-01-14 Rune Rosander Mikrofon
IT1239899B (it) * 1990-03-22 1993-11-23 Sgs Thomson Microelectronics Amplificatore a basso rumore e alta impedenza d'ingresso, particolarmente per microfoni
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
JP3437237B2 (ja) * 1994-01-21 2003-08-18 松下電器産業株式会社 増幅装置
US5446413A (en) * 1994-05-20 1995-08-29 Knowles Electronics, Inc. Impedance circuit for a miniature hearing aid
SE506362C2 (sv) * 1996-04-22 1997-12-08 Bilsom Ab Mikrofonkrets
US6160450A (en) * 1999-04-09 2000-12-12 National Semiconductor Corporation Self-biased, phantom-powered and feedback-stabilized amplifier for electret microphone

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017118167A (ja) * 2015-12-21 2017-06-29 株式会社オーディオテクニカ コンデンサマイクロホン
US9736586B2 (en) 2015-12-21 2017-08-15 Kabushiki Kaisha Audio-Technica Condenser microphone
US9893691B2 (en) 2015-12-25 2018-02-13 Kabushiki Kaisha Audio-Technica Impedance converter and condenser microphone

Also Published As

Publication number Publication date
US6453048B1 (en) 2002-09-17
JPH11317996A (ja) 1999-11-16

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