GB1435323A - Audio amplifiers - Google Patents

Audio amplifiers

Info

Publication number
GB1435323A
GB1435323A GB2228573A GB2228573A GB1435323A GB 1435323 A GB1435323 A GB 1435323A GB 2228573 A GB2228573 A GB 2228573A GB 2228573 A GB2228573 A GB 2228573A GB 1435323 A GB1435323 A GB 1435323A
Authority
GB
United Kingdom
Prior art keywords
transistor
conductive
amplifier
transistors
capacitor
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
Application number
GB2228573A
Other languages
English (en)
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1435323A publication Critical patent/GB1435323A/en
Expired legal-status Critical Current

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
    • H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull amplifiers
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3069—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output
    • H03F3/3076—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage
    • H03F3/3077—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the emitters of complementary power transistors being connected to the output with symmetrical driving of the end stage using Darlington transistors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3083—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type
    • H03F3/3086—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal
    • H03F3/3091—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor the power transistors being of the same type two power transistors being controlled by the input signal comprising two complementary transistors for phase-splitting

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
GB2228573A 1972-05-10 1973-05-10 Audio amplifiers Expired GB1435323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4550072A JPS5539929B2 (US20080094685A1-20080424-C00004.png) 1972-05-10 1972-05-10

Publications (1)

Publication Number Publication Date
GB1435323A true GB1435323A (en) 1976-05-12

Family

ID=12721109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2228573A Expired GB1435323A (en) 1972-05-10 1973-05-10 Audio amplifiers

Country Status (7)

Country Link
US (1) US3904972A (US20080094685A1-20080424-C00004.png)
JP (1) JPS5539929B2 (US20080094685A1-20080424-C00004.png)
DE (1) DE2322317C2 (US20080094685A1-20080424-C00004.png)
FR (1) FR2183696B1 (US20080094685A1-20080424-C00004.png)
GB (1) GB1435323A (US20080094685A1-20080424-C00004.png)
HK (1) HK30379A (US20080094685A1-20080424-C00004.png)
NL (1) NL176726C (US20080094685A1-20080424-C00004.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022949A (en) * 1978-05-15 1979-12-19 Tokyo Shibaura Electric Co Bias circuit for a linear amplifier
GB2172458A (en) * 1985-03-13 1986-09-17 Sgs Microelettronica Spa Apparatus and method for muting an output signal in a switching amplifier
GB2238192A (en) * 1989-11-13 1991-05-22 Richard John Walters An electronic switch arrangement
GB2279192A (en) * 1990-10-10 1994-12-21 Thomson Consumer Electronics Muting circuit

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508844U (US20080094685A1-20080424-C00004.png) * 1973-05-22 1975-01-29
JPS50122849A (US20080094685A1-20080424-C00004.png) * 1974-03-14 1975-09-26
JPS50153552A (US20080094685A1-20080424-C00004.png) * 1974-05-30 1975-12-10
JPS575083B2 (US20080094685A1-20080424-C00004.png) * 1974-08-28 1982-01-28
JPS5136855A (US20080094685A1-20080424-C00004.png) * 1974-09-24 1976-03-27 Sanyo Electric Co
JPS5838968B2 (ja) * 1975-06-06 1983-08-26 ソニー株式会社 アンプ
US4034306A (en) * 1976-04-16 1977-07-05 Linear Technology Inc. D.C. amplifier for use with low supply voltage
JPS5348438A (en) * 1976-10-14 1978-05-01 Nec Corp Transistor amplifier
JPS5843283Y2 (ja) * 1977-09-27 1983-09-30 日本電気株式会社 集積回路用差動増幅回路
JPS54104761A (en) * 1978-02-03 1979-08-17 Nec Corp Audio amplifier
JPS5523682A (en) * 1978-08-08 1980-02-20 Nec Corp Power amplifier
JPS5531324A (en) * 1978-08-29 1980-03-05 Fujitsu Ltd Transient noise preventing circuit
JPS55163905A (en) * 1979-06-07 1980-12-20 Nec Corp Feedback amplifier
DE2931144A1 (de) * 1979-08-01 1981-02-19 Philips Patentverwaltung Schaltungsanordnung zum beseitigen des ein- und ausschaltknackens bei einem verstaerker
DE3113824C2 (de) * 1981-04-06 1983-12-08 Philips Patentverwaltung Gmbh, 2000 Hamburg Verstärker mit Mitteln zum Unterdrücken von Gleichspannungssprüngen am Verstärkerausgang
DE3114042A1 (de) * 1981-04-07 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Integrierbare halbleiterschaltung mit einem gegengekoppelten, nichtinvertierenden operationsverstaerker
JPS57146414U (US20080094685A1-20080424-C00004.png) * 1981-11-12 1982-09-14
DE3337072C2 (de) * 1982-10-16 1985-09-26 Metz Apparatewerke Inh. Paul Metz, 8510 Fürth Niederfrequenzverstärker
DE3244254C1 (de) * 1982-11-30 1984-03-15 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Schaltung zur Stummsteuerung eines NF-Leistungsverstärkers beim Ein- und Ausschalten
IT1213158B (it) * 1984-04-20 1989-12-14 Ates Componenti Elettron Circuito di controllo dell'accensione per amplificatore audio.
JPS60193707U (ja) * 1984-05-31 1985-12-23 富士通テン株式会社 電源投入時のミユ−ト回路
JPS61166205A (ja) * 1985-08-16 1986-07-26 Nec Corp 電力増幅回路
JPH07105670B2 (ja) * 1990-08-30 1995-11-13 三洋電機株式会社 増幅回路
JP2004229203A (ja) 2003-01-27 2004-08-12 Ricoh Co Ltd 半導体集積回路および該半導体集積回路を用いた音響素子ドライブアンプ
JP2010226592A (ja) * 2009-03-25 2010-10-07 Renesas Electronics Corp 演算増幅器
CN109212448B (zh) * 2018-08-22 2020-06-16 中国科学院地质与地球物理研究所 自稳零电路
CN113938103B (zh) * 2021-12-16 2022-06-07 武汉市聚芯微电子有限责任公司 音频驱动芯片及音频驱动方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953055A (en) * 1954-01-13 1960-09-20 Hammond Organ Co Percussion tone electrical musical instrument
US2953056A (en) * 1957-03-13 1960-09-20 Hammond Organ Co Percussion tone electrical musical instrument
US3003383A (en) * 1958-08-05 1961-10-10 Richard E Williams Percussion system
US3290562A (en) * 1963-12-10 1966-12-06 Gen Electric Self-synchronized controller for "bumpless" transfer between manual and automatic modes
US3588525A (en) * 1966-12-16 1971-06-28 Hitachi Ltd Chattering preventing circuit
JPS4525366Y1 (US20080094685A1-20080424-C00004.png) * 1968-12-11 1970-10-05

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022949A (en) * 1978-05-15 1979-12-19 Tokyo Shibaura Electric Co Bias circuit for a linear amplifier
GB2172458A (en) * 1985-03-13 1986-09-17 Sgs Microelettronica Spa Apparatus and method for muting an output signal in a switching amplifier
GB2172458B (en) * 1985-03-13 1989-10-11 Sgs Microelettronica Spa Apparatus and method for muting an output signal in a switching amplifier
GB2238192A (en) * 1989-11-13 1991-05-22 Richard John Walters An electronic switch arrangement
GB2238192B (en) * 1989-11-13 1994-03-30 Richard John Walters An electronic switch arrangement
GB2279192A (en) * 1990-10-10 1994-12-21 Thomson Consumer Electronics Muting circuit
GB2279192B (en) * 1990-10-10 1995-05-03 Thomson Consumer Electronics Muting circuit

Also Published As

Publication number Publication date
JPS5539929B2 (US20080094685A1-20080424-C00004.png) 1980-10-15
US3904972A (en) 1975-09-09
FR2183696B1 (US20080094685A1-20080424-C00004.png) 1977-08-26
NL7306421A (US20080094685A1-20080424-C00004.png) 1973-11-13
DE2322317C2 (de) 1982-05-06
FR2183696A1 (US20080094685A1-20080424-C00004.png) 1973-12-21
NL176726C (nl) 1985-05-17
JPS498153A (US20080094685A1-20080424-C00004.png) 1974-01-24
DE2322317A1 (de) 1974-01-17
HK30379A (en) 1979-05-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19930509