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TWI341082B - Amplifying apparatus with automatic level controller - Google Patents

Amplifying apparatus with automatic level controller

Info

Publication number
TWI341082B
TWI341082B TW094119843A TW94119843A TWI341082B TW I341082 B TWI341082 B TW I341082B TW 094119843 A TW094119843 A TW 094119843A TW 94119843 A TW94119843 A TW 94119843A TW I341082 B TWI341082 B TW I341082B
Authority
TW
Taiwan
Prior art keywords
level controller
amplifying apparatus
automatic level
automatic
amplifying
Prior art date
Application number
TW094119843A
Other languages
English (en)
Other versions
TW200611489A (en
Inventor
Akio Ogura
Original Assignee
Rohm Co 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 Rohm Co Ltd filed Critical Rohm Co Ltd
Publication of TW200611489A publication Critical patent/TW200611489A/zh
Application granted granted Critical
Publication of TWI341082B publication Critical patent/TWI341082B/zh

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • 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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching
    • 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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Circuits Of Receivers In General (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
TW094119843A 2004-06-17 2005-06-15 Amplifying apparatus with automatic level controller TWI341082B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004179588 2004-06-17
JP2005135729A JP4640948B2 (ja) 2004-06-17 2005-05-09 Ａｌｃ付き増幅装置およびそれを用いた電子機器

Publications (2)

Publication Number Publication Date
TW200611489A TW200611489A (en) 2006-04-01
TWI341082B true TWI341082B (en) 2011-04-21

Family

ID=35479999

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094119843A TWI341082B (en) 2004-06-17 2005-06-15 Amplifying apparatus with automatic level controller

Country Status (4)

Country Link
US (1) US7221226B2 (zh)
JP (1) JP4640948B2 (zh)
KR (1) KR20060049400A (zh)
TW (1) TWI341082B (zh)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008131335A (ja) * 2006-11-21 2008-06-05 Seiko Npc Corp 利得制御回路及び電波受信回路
KR100829112B1 (ko) * 2006-12-04 2008-05-16 삼성전자주식회사 휴대 단말기의 오디오 신호 왜곡 보상 장치 및 방법
US7825871B2 (en) * 2007-03-19 2010-11-02 Broadcom Corporation Method and system for equalizing antenna circuit matching variations
US8514015B2 (en) 2008-12-10 2013-08-20 Qualcomm, Incorporated Amplifier with programmable off voltage
US20100154393A1 (en) * 2008-12-19 2010-06-24 Ronald Graham Silver Combination partial flow particulate filter and catalyst
TWI492524B (zh) * 2009-01-13 2015-07-11 Realtek Semiconductor Corp Gain control circuit and gain control method
JP5555092B2 (ja) * 2009-09-10 2014-07-23 ローム株式会社 レベル調節回路およびそれを用いたオーディオシステム
JP5513907B2 (ja) * 2010-01-26 2014-06-04 ローム株式会社 自動レベル制御回路およびそれを用いたオーディオ用デジタル信号プロセッサ、電子機器ならびに可変利得増幅器の利得制御方法
JP2013085008A (ja) * 2010-02-26 2013-05-09 Panasonic Corp 抵抗の調整機能を有する演算回路
JP2012134804A (ja) * 2010-12-22 2012-07-12 Lapis Semiconductor Co Ltd 音声信号の自動レベル調整回路
JP6518957B2 (ja) * 2015-09-14 2019-05-29 パナソニックＩｐマネジメント株式会社 音声信号処理装置及びそれを用いた撮像装置
CN108415496B (zh) * 2018-02-13 2020-07-07 广州天电科技有限公司 一种基准调节方法及装置
FR3152688A1 (fr) * 2023-08-29 2025-03-07 Stmicroelectronics International N.V. Circuit de démodulation NFC

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317333A (en) * 1976-07-30 1978-02-17 Canon Inc Automatic gain control circuit for simultaneous sound recording cine camera
JP3606917B2 (ja) * 1994-08-25 2005-01-05 富士通株式会社 コンパンダ回路及びこれを用いた通信装置
US5771301A (en) * 1994-09-15 1998-06-23 John D. Winslett Sound leveling system using output slope control
DE69712801T2 (de) * 1997-12-23 2002-11-07 Widex A/S, Vaerloese Dynamische automatische verstärkungssteuerung in einem hörhilfegerät
JP2000068769A (ja) * 1998-08-18 2000-03-03 Fujitsu Ltd 信号処理装置
US6418303B1 (en) * 2000-02-29 2002-07-09 Motorola, Inc. Fast attack automatic gain control (AGC) loop and methodology for narrow band receivers
GB2380341B (en) * 2001-09-29 2003-11-12 Motorola Inc Automatic gain control circuit and an RF receiver and method using such a circuit
JP2003173211A (ja) 2001-12-05 2003-06-20 Rohm Co Ltd レギュレータ
JP2003318677A (ja) * 2002-04-22 2003-11-07 Sony Corp 利得調整装置及び方法
JP4578169B2 (ja) * 2004-07-23 2010-11-10 三洋電機株式会社 自動レベル調整回路

Also Published As

Publication number Publication date
US20050280470A1 (en) 2005-12-22
TW200611489A (en) 2006-04-01
KR20060049400A (ko) 2006-05-18
JP2006033796A (ja) 2006-02-02
JP4640948B2 (ja) 2011-03-02
US7221226B2 (en) 2007-05-22

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees