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
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/JP2008/065851
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Yuma Kawai
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 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
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
    • H03F3/04—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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/12—Circuits for transducers 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)
PCT/JP2008/065851 2007-09-13 2008-09-03 構内放送システム Ceased 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
JP2007-237837 2007-09-13
JP2007237837A JP5139014B2 (ja) 2007-09-13 2007-09-13 構内放送システム

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 Ceased WO2009034889A1 (ja) 2007-09-13 2008-09-03 構内放送システム

Country Status (5)

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

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

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