GB1401457A - Muting circuits - Google Patents

Muting circuits

Info

Publication number
GB1401457A
GB1401457A GB5657572A GB5657572A GB1401457A GB 1401457 A GB1401457 A GB 1401457A GB 5657572 A GB5657572 A GB 5657572A GB 5657572 A GB5657572 A GB 5657572A GB 1401457 A GB1401457 A GB 1401457A
Authority
GB
United Kingdom
Prior art keywords
transistor
resistor
collector
capacitor
conductive
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
GB5657572A
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of GB1401457A publication Critical patent/GB1401457A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Electronic Switches (AREA)
  • Control Of Amplification And Gain Control (AREA)
GB5657572A 1971-12-17 1972-12-07 Muting circuits Expired GB1401457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971119153U JPS5339170Y2 (forum.php) 1971-12-17 1971-12-17

Publications (1)

Publication Number Publication Date
GB1401457A true GB1401457A (en) 1975-07-16

Family

ID=14754218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5657572A Expired GB1401457A (en) 1971-12-17 1972-12-07 Muting circuits

Country Status (6)

Country Link
US (1) US3840820A (forum.php)
JP (1) JPS5339170Y2 (forum.php)
CA (1) CA964594A (forum.php)
DE (1) DE2261139C2 (forum.php)
GB (1) GB1401457A (forum.php)
NL (1) NL182358C (forum.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106953A1 (en) * 1982-09-24 1984-05-02 Hitachi, Ltd. Amplifier

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5340129Y2 (forum.php) * 1972-12-14 1978-09-28
JPS5744044B2 (forum.php) * 1974-01-10 1982-09-18
US3965295A (en) * 1974-07-17 1976-06-22 Mcintosh Laboratory, Inc. Protective system for stereo loudspeakers
JPS574491Y2 (forum.php) * 1975-07-25 1982-01-27
JPS5616826Y2 (forum.php) * 1975-11-21 1981-04-20
US4054845A (en) * 1975-12-08 1977-10-18 Rca Corporation Transient and thermal protection
JPS5642575Y2 (forum.php) * 1976-08-16 1981-10-05
JPS5394160A (en) * 1977-01-28 1978-08-17 Pioneer Electronic Corp Muutuning circuit
JPS6127210Y2 (forum.php) * 1977-05-31 1986-08-14
JPS6034094Y2 (ja) * 1979-03-26 1985-10-11 オリンパス光学工業株式会社 ミユ−テイング回路
JPS55684A (en) * 1979-04-14 1980-01-07 Toshiba Corp Power unit for aural amplifier
DE2950918A1 (de) * 1979-12-14 1981-06-19 Siemens AG, 1000 Berlin und 8000 München Ueberspannungsschutzschaltung
JPS5717204A (en) * 1980-07-04 1982-01-28 Fujitsu Ltd Transient sound prevention type power amplifying circuit
US4408098A (en) * 1981-06-18 1983-10-04 U.S. Philips Corporation Receiver with field-strength dependent noise reduction control
DE3131429C2 (de) * 1981-08-07 1986-03-20 ANT Nachrichtentechnik GmbH, 7150 Backnang Transistor-Leistungsschaltung
DE3216833A1 (de) * 1982-05-05 1983-11-10 Siemens AG, 1000 Berlin und 8000 München Schutzschaltung fuer einen schalttransistor
US4441086A (en) * 1982-05-13 1984-04-03 General Motors Corporation Audio system with orderly shutdown sequence
DE3337072C2 (de) * 1982-10-16 1985-09-26 Metz Apparatewerke Inh. Paul Metz, 8510 Fürth Niederfrequenzverstärker
US4975963A (en) * 1983-08-01 1990-12-04 Zvie Liberman Muting circuit
DE3512480A1 (de) * 1985-04-04 1986-10-09 AKO-Werke GmbH & Co KG, 7988 Wangen Schalteinrichtung
IT1217773B (it) * 1988-06-02 1990-03-30 Sgs Thomson Microelectronics Circuito di ammutolimento per amplificatori audio
US5237421A (en) * 1990-08-27 1993-08-17 Thomson Consumer Electronics, Inc. Shutdown system in a television receiver
US5255094A (en) * 1990-10-10 1993-10-19 Thomson Consumer Electronics, S.A. Muting circuit for eliminating transient signals generated due to power supply turn-on and turn-off
JPH04160910A (ja) * 1990-10-25 1992-06-04 Pioneer Electron Corp 保護回路
JPH0831798B2 (ja) * 1990-11-07 1996-03-27 松下電器産業株式会社 Ｄ／ａ変換器
EP0576770B1 (en) * 1992-05-22 1999-12-22 STMicroelectronics S.r.l. Audio Amplifier turn-off control circuit
US5818299A (en) * 1995-08-04 1998-10-06 Compaq Computer Corporation Power management in a computer
US7167697B2 (en) * 2003-11-03 2007-01-23 Oneworld Enterprises Limited Reverse electronic tuning circuit for FM radio frequency-lock-loop circuits
TWI230557B (en) * 2003-11-06 2005-04-01 Liteon It Corp Mute circuit for use in the duration of power switching
CN100505542C (zh) * 2004-12-29 2009-06-24 普诚科技股份有限公司 音频放大器静音电路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245492B (de) * 1960-03-22 1967-07-27 Merk Ag Telefonbau Friedrich Schaltungsanordnung fuer die zeitliche Staffelung der Ein- und Ausschaltung der Steuer- und Betriebsspannungen einer Halbleiterschaltung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0106953A1 (en) * 1982-09-24 1984-05-02 Hitachi, Ltd. Amplifier

Also Published As

Publication number Publication date
NL182358B (nl) 1987-09-16
JPS4873514U (forum.php) 1973-09-13
JPS5339170Y2 (forum.php) 1978-09-21
DE2261139A1 (de) 1973-06-20
NL182358C (nl) 1988-02-16
CA964594A (en) 1975-03-18
NL7217237A (forum.php) 1973-06-19
US3840820A (en) 1974-10-08
DE2261139C2 (de) 1983-06-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee