WO2009034889A1 - 構内放送システム - Google Patents

構内放送システム Download PDF

Info

Publication number
WO2009034889A1
WO2009034889A1 PCT/JP2008/065851 JP2008065851W WO2009034889A1 WO 2009034889 A1 WO2009034889 A1 WO 2009034889A1 JP 2008065851 W JP2008065851 W JP 2008065851W WO 2009034889 A1 WO2009034889 A1 WO 2009034889A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
terminals
amplifying stage
insulating
power source
Prior art date
Application number
PCT/JP2008/065851
Other languages
English (en)
French (fr)
Inventor
Yuma Kawai
Koji Kawaguchi
Original Assignee
Toa Corporation
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 Corporation filed Critical Toa Corporation
Priority to CN2008801065580A priority Critical patent/CN101803183B/zh
Priority to EP08830079.3A priority patent/EP2190114B1/en
Priority to US12/677,593 priority patent/US8306239B2/en
Publication of WO2009034889A1 publication Critical patent/WO2009034889A1/ja

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
    • H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
    • H03F3/085—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light using opto-couplers between stages
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • 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

Abstract

【課題】　伝送ラインと接地電位との間の絶縁を維持しつつ、電力増幅器を小型化する。 【解決手段】　オーディオ信号源２の２つの端子（２ａ、２ｂ）が絶縁入力回路（６）の入力側に接続されている。絶縁入力回路（６）の出力側の２つの端子（６ａ、６ｂ）に入力側と絶縁された状態で生じたオーディオ信号が電力増幅段（１２）に入力される。これを電力増幅段（１２）が増幅して、絶縁トランスを用いないで２つの出力端子（１２ｃ、１２ｄ）から複数のスピーカ（２２）に高電圧で出力する。直流電源（１４）の２つの電源端子（２０ｃ、２０ｄ）から電力増幅段（１２）に動作電力が供給される。絶縁入力回路（６）の一方の端子（６ｄ）と、電力増幅段（１２）の一方の出力端子（１２ｄ）と、直流電源（１４）の一方の電源端子（２０ｄ）とが、互いに接続されて、接地の電位とは異なる共通電位点とされている。
PCT/JP2008/065851 2007-09-13 2008-09-03 構内放送システム WO2009034889A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN2008801065580A CN101803183B (zh) 2007-09-13 2008-09-03 场内广播系统
EP08830079.3A EP2190114B1 (en) 2007-09-13 2008-09-03 Local broadcasting system
US12/677,593 US8306239B2 (en) 2007-09-13 2008-09-03 Public-address system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007237837A JP5139014B2 (ja) 2007-09-13 2007-09-13 構内放送システム
JP2007-237837 2007-09-13

Publications (1)

Publication Number Publication Date
WO2009034889A1 true WO2009034889A1 (ja) 2009-03-19

Family

ID=40451898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/065851 WO2009034889A1 (ja) 2007-09-13 2008-09-03 構内放送システム

Country Status (5)

Country Link
US (1) US8306239B2 (ja)
EP (1) EP2190114B1 (ja)
JP (1) JP5139014B2 (ja)
CN (1) CN101803183B (ja)
WO (1) WO2009034889A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5685173B2 (ja) * 2011-10-04 2015-03-18 Toa株式会社 拡声システム
CN102412741A (zh) * 2011-12-12 2012-04-11 西安福安创意咨询有限责任公司 一种日光灯隔离型双电源方法
CN102420536A (zh) * 2011-12-12 2012-04-18 西安福安创意咨询有限责任公司 一种led隔离型双电源方法
CN103780211A (zh) * 2013-12-31 2014-05-07 北京长峰广播通讯设备有限责任公司 高电压固态放大器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11187495A (ja) * 1997-12-19 1999-07-09 Toa Corp スピーカラインの検査装置
JP2004112161A (ja) * 2002-09-17 2004-04-08 Sony Corp 音声出力装置
JP2004129018A (ja) * 2002-10-04 2004-04-22 Matsushita Electric Ind Co Ltd パワードスピーカー装置
JP2005236349A (ja) * 2004-02-17 2005-09-02 Toa Corp 増幅器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03108907A (ja) * 1989-09-22 1991-05-09 Sharp Corp 絶縁アンプ
JPH0467782A (ja) 1990-07-06 1992-03-03 Matoritsukusu:Kk 交流電力増幅装置
US5818328A (en) * 1995-10-03 1998-10-06 Audio Enhancement Method and system for providing improved wireless audio transmission
US6407603B2 (en) * 1999-09-20 2002-06-18 Lockheed Martin Corporation Analog voltage isolation circuit
US20060182288A1 (en) * 2005-02-16 2006-08-17 Arcaria Angelo S Addressable zone relay method and apparatus
JP4607742B2 (ja) * 2005-11-15 2011-01-05 アバゴ・テクノロジーズ・イーシービーユー・アイピー（シンガポール）プライベート・リミテッド フォトカプラの制御装置及びフォトカプラの制御方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11187495A (ja) * 1997-12-19 1999-07-09 Toa Corp スピーカラインの検査装置
JP2004112161A (ja) * 2002-09-17 2004-04-08 Sony Corp 音声出力装置
JP2004129018A (ja) * 2002-10-04 2004-04-22 Matsushita Electric Ind Co Ltd パワードスピーカー装置
JP2005236349A (ja) * 2004-02-17 2005-09-02 Toa Corp 増幅器

Also Published As

Publication number Publication date
CN101803183A (zh) 2010-08-11
US20100189278A1 (en) 2010-07-29
EP2190114A1 (en) 2010-05-26
EP2190114B1 (en) 2014-08-13
EP2190114A4 (en) 2012-05-09
JP5139014B2 (ja) 2013-02-06
CN101803183B (zh) 2013-08-14
JP2009071582A (ja) 2009-04-02
US8306239B2 (en) 2012-11-06

Similar Documents

Publication Publication Date Title
CN101584112B (zh) 具有多组固定和可变电压轨的多级放大器
WO2011031379A3 (en) Boosted-rail amplifier
JP2007312260A (ja) マイクロホン回路
CN105262445B (zh) 放大器的输出电路及ab类推挽放大器的输出电路
WO2009034889A1 (ja) 構内放送システム
SE0700315L (sv) Ljudåtergivningssystem
WO2008100055A3 (en) Microphone amplifier
TW200501551A (en) Audio signal amplifier circuit and electronic apparatus having the same
TW200627791A (en) Power amplifier circuit and method thereof
WO2008105073A1 (ja) 送信装置
US20190222937A1 (en) Stereo audio system and method
US10178465B2 (en) Headphone unit
JP2009071582A5 (ja)
TW200740111A (en) Low distortion class-D amplifier and audio system thereof
TW200705341A (en) POP noise process circuit structure applying to panel display apparatus
KR101248181B1 (ko) 전관방송 시스템용 출력 트랜스 내장형 ｄ클래스 파워앰프
EP2755322B1 (en) An audio amplifier
CN102905211A (zh) 声音输出设备、用于其声音输出的音频装置及方法
WO2007140392A3 (en) Methods and apparatus to provide slew enhancement for low power amplifiers
AU2004231903B2 (en) Amplifier arrangement and distributed audio system
US20080002843A1 (en) Ripple digital amplifier system
KR100817789B1 (ko) Ｐｌｃ 스피커 시스템
TWI542141B (zh) RF power amplifier
KR101253711B1 (ko) 과부하를 방지할 수 있는 공동시설 방송용 증폭장치
KR20100043503A (ko) 튜너용 입력 분리 장치 및 그것을 포함하는 스위칭 시스템

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880106558.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08830079

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 12677593

Country of ref document: US

Ref document number: 2008830079

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE