DE69231613T2 - Steuerschaltung zum Ein- und Ausschalten eines Audioverstärkers - Google Patents

Steuerschaltung zum Ein- und Ausschalten eines Audioverstärkers

Info

Publication number
DE69231613T2
DE69231613T2 DE69231613T DE69231613T DE69231613T2 DE 69231613 T2 DE69231613 T2 DE 69231613T2 DE 69231613 T DE69231613 T DE 69231613T DE 69231613 T DE69231613 T DE 69231613T DE 69231613 T2 DE69231613 T2 DE 69231613T2
Authority
DE
Germany
Prior art keywords
switching
control circuit
audio amplifier
amplifier
audio
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
DE69231613T
Other languages
English (en)
Other versions
DE69231613D1 (de
Inventor
Daniela Nebuloni
Andrea Fassina
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.)
STMicroelectronics SRL
Original Assignee
STMicroelectronics SRL
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 STMicroelectronics SRL filed Critical STMicroelectronics SRL
Publication of DE69231613D1 publication Critical patent/DE69231613D1/de
Application granted granted Critical
Publication of DE69231613T2 publication Critical patent/DE69231613T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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 or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/348—Muting in response to a mechanical action or to power supply variations, e.g. during tuning; Click removal circuits
    • 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)
  • Control Of Amplification And Gain Control (AREA)
DE69231613T 1992-05-22 1992-05-22 Steuerschaltung zum Ein- und Ausschalten eines Audioverstärkers Expired - Fee Related DE69231613T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92830254A EP0570655B1 (de) 1992-05-22 1992-05-22 Steuerschaltung zum Ein- und Ausschalten eines Audioverstärkers

Publications (2)

Publication Number Publication Date
DE69231613D1 DE69231613D1 (de) 2001-02-01
DE69231613T2 true DE69231613T2 (de) 2001-05-31

Family

ID=8212107

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69231613T Expired - Fee Related DE69231613T2 (de) 1992-05-22 1992-05-22 Steuerschaltung zum Ein- und Ausschalten eines Audioverstärkers

Country Status (4)

Country Link
US (1) US5363062A (de)
EP (1) EP0570655B1 (de)
JP (1) JPH0637560A (de)
DE (1) DE69231613T2 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678975B1 (de) * 1994-04-15 1997-10-08 STMicroelectronics S.r.l. Niederfrequenzverstärker
DE69413235T2 (de) 1994-10-31 1999-01-28 St Microelectronics Srl In verschiedene Konfigurationen umschaltbarer Operationsverstärker
US5648742A (en) * 1995-10-23 1997-07-15 National Semiconductor Corporation Amplifier circuit with reduced turn-on and turn-off transients
US5642074A (en) * 1995-10-13 1997-06-24 National Semiconductor Corporation Amplifier circuit with reduced turn-on and turn-off transients
US5939938A (en) * 1995-10-13 1999-08-17 National Semiconductor Corporation Amplifier circuit with reduced DC power related turn-on and turn-off transients
US5703529A (en) * 1995-10-13 1997-12-30 National Semiconductor Corporation Amplifier circuit with reduced DC power related transients
DE19547093A1 (de) * 1995-12-16 1997-06-19 Nokia Deutschland Gmbh Schaltungsanordnung zur Verbesserung des Störabstandes
DE69917767T2 (de) 1999-07-20 2005-06-02 Stmicroelectronics S.R.L., Agrate Brianza Empfängerteil eines Telephons
WO2002015388A2 (en) * 2000-08-11 2002-02-21 Maxim Integrated Products, Inc. Amplifier circuits and methods to provide smooth transition of amplifier outputs during powering sequences
FR2853472B1 (fr) * 2003-04-01 2005-06-24 St Microelectronics Sa Circuit amplificateur audio
US7283596B2 (en) * 2003-07-08 2007-10-16 Avago Technologies General Ip (Singapore) Pte Ltd PAM-4 data slicer having symmetrical offset
TWI235543B (en) * 2004-05-17 2005-07-01 Analog And Power Electronics C Amplifier circuit that prohibits instantaneous turn-on pop and method thereof
JP4535901B2 (ja) * 2005-02-16 2010-09-01 新日本無線株式会社 オーディオ増幅器
CN101375534B (zh) * 2005-06-29 2012-03-21 美国亚德诺半导体公司 用于音频设备的改进的充/放电控制电路
EP2132871B1 (de) 2007-03-07 2015-02-11 Nxp B.V. Signalprozessor mit einer referenzspannungsschaltung
US9014396B2 (en) 2008-01-31 2015-04-21 Qualcomm Incorporated System and method of reducing click and pop noise in audio playback devices
JP4759015B2 (ja) * 2008-04-25 2011-08-31 株式会社リコー 定電圧回路
WO2010111438A2 (en) 2009-03-25 2010-09-30 Pacid Technologies, Llc System and method for protecting a secrets file
CN102324895B (zh) * 2011-07-01 2013-07-31 四川和芯微电子股份有限公司 Pop噪声抑制电路及方法
US8779962B2 (en) * 2012-04-10 2014-07-15 Fairchild Semiconductor Corporation Audio device switching with reduced pop and click
GB2560045B (en) * 2017-02-28 2019-10-30 Cirrus Logic Int Semiconductor Ltd Amplifiers
CN116723451B (zh) * 2023-08-10 2023-11-03 上海海栎创科技股份有限公司 一种放音电源控制电路及控制方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1213158B (it) * 1984-04-20 1989-12-14 Ates Componenti Elettron Circuito di controllo dell'accensione per amplificatore audio.
IT1229860B (it) * 1988-11-09 1991-09-13 Sgs Thomson Microelectronics Amplificatore audio integrato con regolazione unificata delle funzioni di "mute" e "stand by" e dei transitori di commutazione.

Also Published As

Publication number Publication date
JPH0637560A (ja) 1994-02-10
EP0570655A1 (de) 1993-11-24
US5363062A (en) 1994-11-08
DE69231613D1 (de) 2001-02-01
EP0570655B1 (de) 2000-12-27

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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