WO2009054265A1 - オーディオパワーアンプ - Google Patents

オーディオパワーアンプ Download PDF

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Publication number
WO2009054265A1
WO2009054265A1 PCT/JP2008/068276 JP2008068276W WO2009054265A1 WO 2009054265 A1 WO2009054265 A1 WO 2009054265A1 JP 2008068276 W JP2008068276 W JP 2008068276W WO 2009054265 A1 WO2009054265 A1 WO 2009054265A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
relay
input side
power amplifier
amplifier
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.)
Ceased
Application number
PCT/JP2008/068276
Other languages
English (en)
French (fr)
Inventor
Koji Kawaguchi
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.)
Toa Corp
Original Assignee
Toa 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 Toa Corp filed Critical Toa Corp
Priority to CN200880107251.2A priority Critical patent/CN101803185B/zh
Priority to EP08841759.7A priority patent/EP2202880B1/en
Publication of WO2009054265A1 publication Critical patent/WO2009054265A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0277—Selecting one or more amplifiers from a plurality of amplifiers
    • 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
    • H03F1/52—Circuit arrangements for protecting such 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
    • H03F3/187—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only in integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/211—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/72—Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
    • 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
    • H03F2200/414—A switch being coupled in the output circuit of an amplifier to switch the output on/off
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/537—A transformer being used as coupling element between two amplifying stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/541—Transformer coupled at the output of an amplifier
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/20—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F2203/21—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F2203/211—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H03F2203/21109—An input signal being distributed by switching to a plurality of paralleled power amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/20—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F2203/21—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F2203/211—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
    • H03F2203/21145—Output signals are combined by switching a plurality of paralleled power amplifiers to a common output
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/007—Protection circuits for transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/12—Circuits for transducers for distributing signals to two or more loudspeakers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)

Abstract

【課題】　従来よりも小型かつ軽量であり、しかも様々な使用条件に柔軟に対応することができるハイ・インピーダンス方式のパワーアンプを提供する。 【解決手段】　多チャンネルモードが選択されると、入力側のリレー１６は、第２チャンネルＣＨ２用の増幅回路１２ａの入力側を第２チャンネルＣＨ２用の入力端子１４ａと接続するように切り換わる。併せて、出力側のリレー４２は、ＯＦＦする。これにより、第１チャンネルＣＨ１と第２チャンネルＣＨ２とを有する多チャンネルアンプが形成される。一方、大出力モードが選択されると、入力側リレー１６は、第２チャンネルＣＨ２用の増幅回路１２ａの入力側を第１チャンネルＣＨ１用の入力端子１４と接続するように切り換わる。併せて、出力側リレー４２はＯＮする。これにより、合成チャンネルＣＨ０のみの単一チャンネルながらも６０［Ｗ］の定格出力を有する大出力アンプが形成される。
PCT/JP2008/068276 2007-10-23 2008-10-08 オーディオパワーアンプ Ceased WO2009054265A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN200880107251.2A CN101803185B (zh) 2007-10-23 2008-10-08 音频功率放大器
EP08841759.7A EP2202880B1 (en) 2007-10-23 2008-10-08 Audio power amplifier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-274544 2007-10-23
JP2007274544A JP4949193B2 (ja) 2007-10-23 2007-10-23 オーディオパワーアンプ

Publications (1)

Publication Number Publication Date
WO2009054265A1 true WO2009054265A1 (ja) 2009-04-30

Family

ID=40579371

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068276 Ceased WO2009054265A1 (ja) 2007-10-23 2008-10-08 オーディオパワーアンプ

Country Status (4)

Country Link
EP (1) EP2202880B1 (ja)
JP (1) JP4949193B2 (ja)
CN (1) CN101803185B (ja)
WO (1) WO2009054265A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102934342A (zh) * 2010-03-08 2013-02-13 达文希斯 用于化学气象沉积装置的电源装置及其控制方法
CN103812458A (zh) * 2014-01-27 2014-05-21 合肥师范学院 X波段单片功率放大器
CN116684786A (zh) * 2023-06-30 2023-09-01 苏州爱情之音科技有限公司 功放切换控制电路、电子设备及方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8384478B2 (en) * 2010-03-04 2013-02-26 Bose Corporation Versatile audio power amplifier
US9515749B2 (en) * 2015-05-07 2016-12-06 Qualcomm Incorporated Low noise amplifier module with output coupler
CN111885462B (zh) * 2020-07-17 2022-08-05 上海艾为电子技术股份有限公司 音频功放电路及其功放模式控制方法、电子设备
CN116827362B (zh) * 2023-08-29 2023-12-22 上海移芯通信科技股份有限公司 一种射频电路、芯片、多频段接收设备及频段切换方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185386A2 (en) 1984-12-20 1986-06-25 General Electric Company Polyimides and method for their preparation
JPS62271509A (ja) * 1986-05-20 1987-11-25 Matsushita Electric Ind Co Ltd 昇圧トランス型増幅器
JPH0226892U (ja) * 1988-08-05 1990-02-21
JPH0388018U (ja) * 1989-12-26 1991-09-09
JPH0970099A (ja) 1995-08-30 1997-03-11 Toa Corp スピーカラインの検査装置
WO2007080879A1 (ja) * 2006-01-10 2007-07-19 Pioneer Corporation 音声信号処理装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8105371A (nl) * 1981-11-27 1983-06-16 Philips Nv Inrichting voor het aansturen van een of meer omzeteenheden.
JPS58132495U (ja) * 1982-03-01 1983-09-07 三洋電機株式会社 音声出力回路
JPS6047316U (ja) * 1983-09-09 1985-04-03 日本コロムビア株式会社 増幅装置
JPH0226892A (ja) * 1988-07-15 1990-01-29 Fujitsu Ltd 分子線エピタキシャル成長方法及び装置
JPH03141800A (ja) * 1989-07-19 1991-06-17 Nishi Denko:Kk 音響機器システム
JP4674474B2 (ja) * 2005-02-24 2011-04-20 パナソニック株式会社 パラレル駆動バイアンプ切換回路

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185386A2 (en) 1984-12-20 1986-06-25 General Electric Company Polyimides and method for their preparation
JPS62271509A (ja) * 1986-05-20 1987-11-25 Matsushita Electric Ind Co Ltd 昇圧トランス型増幅器
JPH0226892U (ja) * 1988-08-05 1990-02-21
JPH0388018U (ja) * 1989-12-26 1991-09-09
JPH0970099A (ja) 1995-08-30 1997-03-11 Toa Corp スピーカラインの検査装置
WO2007080879A1 (ja) * 2006-01-10 2007-07-19 Pioneer Corporation 音声信号処理装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2202880A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102934342A (zh) * 2010-03-08 2013-02-13 达文希斯 用于化学气象沉积装置的电源装置及其控制方法
CN103812458A (zh) * 2014-01-27 2014-05-21 合肥师范学院 X波段单片功率放大器
CN116684786A (zh) * 2023-06-30 2023-09-01 苏州爱情之音科技有限公司 功放切换控制电路、电子设备及方法

Also Published As

Publication number Publication date
EP2202880B1 (en) 2013-08-21
JP4949193B2 (ja) 2012-06-06
EP2202880A1 (en) 2010-06-30
CN101803185B (zh) 2013-08-14
JP2009105585A (ja) 2009-05-14
CN101803185A (zh) 2010-08-11
EP2202880A4 (en) 2012-02-29

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