FR2866763A1 - Dispositif d'amplification audio avec circuiterie d'antipop - Google Patents

Dispositif d'amplification audio avec circuiterie d'antipop

Info

Publication number
FR2866763A1
FR2866763A1 FR0401687A FR0401687A FR2866763A1 FR 2866763 A1 FR2866763 A1 FR 2866763A1 FR 0401687 A FR0401687 A FR 0401687A FR 0401687 A FR0401687 A FR 0401687A FR 2866763 A1 FR2866763 A1 FR 2866763A1
Authority
FR
France
Prior art keywords
voltage
ramp
bulk
node
beginning
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.)
Granted
Application number
FR0401687A
Other languages
English (en)
Other versions
FR2866763B1 (fr
Inventor
Nicolas Marty
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 SA
Original Assignee
STMicroelectronics SA
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 SA filed Critical STMicroelectronics SA
Priority to FR0401687A priority Critical patent/FR2866763B1/fr
Priority to PCT/EP2005/002365 priority patent/WO2005081400A1/fr
Publication of FR2866763A1 publication Critical patent/FR2866763A1/fr
Application granted granted Critical
Publication of FR2866763B1 publication Critical patent/FR2866763B1/fr
Priority to US11/505,626 priority patent/US7227413B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45475—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using IC blocks as the active amplifying circuit
    • 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
    • H03F2200/186—Indexing scheme relating to amplifiers the ground, reference potential being controlled
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/78—A comparator being used in a controlling circuit of an amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Abstract

Un dispositif d'amplification audio comprend une entrée (11) pour recevoir un signal audio d'entrée (VIN) et une sortie (12) pour délivrer un signal audio de sortie (VOUT) et un amplificateur (OA1) comprenant une paire différentielle de transistors MOS. La grille de commande du premier transistor est couplée à l'entrée du dispositif. La grille de commande dudit second transistor MOS reçoit une tension de référence (VREF) qui présente une rampe montante à la mise sous tension. Le drain de l'un des transistors est couplé à la sortie. L'amplificateur comprend en outre une circuiterie de polarisation pour polariser le substrat des transistors à une première tension sensiblement égale à une tension d'alimentation au début de la rampe de la tension de référence, et à une seconde tension (VBB) sensiblement égale à la tension de leur source (BB) à la fin de ladite rampe.Avantage: on évite ainsi la génération d'un pop à la mise sous tension, tout en bénéficiant d'un PSRR optimal en phase de fonctionnement établi.
FR0401687A 2004-02-19 2004-02-19 Dispositif d'amplification audio avec circuiterie d'antipop Expired - Fee Related FR2866763B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR0401687A FR2866763B1 (fr) 2004-02-19 2004-02-19 Dispositif d'amplification audio avec circuiterie d'antipop
PCT/EP2005/002365 WO2005081400A1 (fr) 2004-02-19 2005-02-18 Dispositif d'amplification audio equipe de circuits permettant d'eviter les bruits parasites lors de la mise sous tension du dispositif
US11/505,626 US7227413B1 (en) 2004-02-19 2006-08-17 Audio amplification device with antipop circuitry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0401687A FR2866763B1 (fr) 2004-02-19 2004-02-19 Dispositif d'amplification audio avec circuiterie d'antipop

Publications (2)

Publication Number Publication Date
FR2866763A1 true FR2866763A1 (fr) 2005-08-26
FR2866763B1 FR2866763B1 (fr) 2006-05-26

Family

ID=34833927

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0401687A Expired - Fee Related FR2866763B1 (fr) 2004-02-19 2004-02-19 Dispositif d'amplification audio avec circuiterie d'antipop

Country Status (3)

Country Link
US (1) US7227413B1 (fr)
FR (1) FR2866763B1 (fr)
WO (1) WO2005081400A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008107849A1 (fr) * 2007-03-07 2008-09-12 Nxp B.V. Processeur de signaux comprenant un circuit de tension de référence

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100691349B1 (ko) * 2005-07-20 2007-03-12 삼성전자주식회사 멀티 파워 시스템에 사용되는 차동 회로, 출력 버퍼 회로및 반도체 집적 회로
GB2440188B (en) * 2006-07-14 2011-06-08 Wolfson Ltd Amplifier Circuits, Methods of Starting and Stopping Amplifier Circuits
DE602008001800D1 (de) 2007-03-29 2010-08-26 Nxp Bv Verbesserter verstärker
US8471628B2 (en) * 2008-10-21 2013-06-25 Semiconductor Components Industries, Llc Amplifier with reduced output transients and method therefor
US7777569B2 (en) * 2009-01-21 2010-08-17 Texas Instruments Incorporated Anti-pop method and apparatus for class AB amplifiers
US7777574B1 (en) * 2009-01-23 2010-08-17 Texas Instruments Incorporated Closed loop ramp up for pop and click reduction in an amplifier
US20110089994A1 (en) * 2009-10-16 2011-04-21 Infineon Technologies Ag Threshold Voltage Modification Via Bulk Voltage Generator
US8350623B2 (en) 2011-03-14 2013-01-08 Texas Instruments Incorporated Variable gain amplifier
US8818005B2 (en) 2011-05-17 2014-08-26 Fairchild Semiconductor Corporation Capacitor controlled switch system
CN103402157B (zh) * 2013-08-02 2016-09-28 昆腾微电子股份有限公司 音频电路、音频系统及消除pop噪声的方法
FR3069397B1 (fr) * 2017-07-18 2020-12-11 Dolphin Integration Sa Circuit et procede de pilotage d'un amplificateur audio
US10554179B2 (en) * 2017-08-08 2020-02-04 Rohm Co., Ltd. Differential circuit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542024B1 (en) * 2002-01-14 2003-04-01 Cirrus Logic, Inc. Circuits and methods for controlling transients during audio device power-down, and systems using the same
US20030067350A1 (en) * 2001-10-05 2003-04-10 Stmicroelectronics S.A. Audio amplifying circuit
US6614280B1 (en) * 2002-07-05 2003-09-02 Dialog Semiconductor Gmbh Voltage buffer for large gate loads with rail-to-rail operation and preferable use in LDO's

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5436588A (en) 1993-12-17 1995-07-25 National Semiconductor Corp. Click/pop free bias circuit
US5694072A (en) * 1995-08-28 1997-12-02 Pericom Semiconductor Corp. Programmable substrate bias generator with current-mirrored differential comparator and isolated bulk-node sensing transistor for bias voltage control
US5760647A (en) * 1996-06-04 1998-06-02 Motorola, Inc. High bandwidth fast settling time operational amplifier and method therefor
US6218892B1 (en) * 1997-06-20 2001-04-17 Intel Corporation Differential circuits employing forward body bias
WO2002015388A2 (fr) * 2000-08-11 2002-02-21 Maxim Integrated Products, Inc. Circuits amplificateurs et procedes garantissant une transition douce au niveau de sorties d'amplificateurs lors de sequences d'alimentation
US6392465B1 (en) * 2000-12-18 2002-05-21 National Semiconductor Corporation Sub-threshold CMOS integrator
US6529421B1 (en) * 2001-08-28 2003-03-04 Micron Technology, Inc. SRAM array with temperature-compensated threshold voltage
AUPR752101A0 (en) 2001-09-07 2001-09-27 Bhc Consulting Pty Ltd Amplifier improvements

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030067350A1 (en) * 2001-10-05 2003-04-10 Stmicroelectronics S.A. Audio amplifying circuit
US6542024B1 (en) * 2002-01-14 2003-04-01 Cirrus Logic, Inc. Circuits and methods for controlling transients during audio device power-down, and systems using the same
US6614280B1 (en) * 2002-07-05 2003-09-02 Dialog Semiconductor Gmbh Voltage buffer for large gate loads with rail-to-rail operation and preferable use in LDO's

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008107849A1 (fr) * 2007-03-07 2008-09-12 Nxp B.V. Processeur de signaux comprenant un circuit de tension de référence
US8179192B2 (en) 2007-03-07 2012-05-15 Nxp B.V. Signal processor comprising a reference voltage circuit

Also Published As

Publication number Publication date
FR2866763B1 (fr) 2006-05-26
US7227413B1 (en) 2007-06-05
WO2005081400A1 (fr) 2005-09-01

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Legal Events

Date Code Title Description
ST Notification of lapse

Effective date: 20071030