JP4960764B2 - 増幅器 - Google Patents

増幅器 Download PDF

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Publication number
JP4960764B2
JP4960764B2 JP2007134058A JP2007134058A JP4960764B2 JP 4960764 B2 JP4960764 B2 JP 4960764B2 JP 2007134058 A JP2007134058 A JP 2007134058A JP 2007134058 A JP2007134058 A JP 2007134058A JP 4960764 B2 JP4960764 B2 JP 4960764B2
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JP
Japan
Prior art keywords
signal
amplifier
voltage
load
phase
Prior art date
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Active
Application number
JP2007134058A
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English (en)
Japanese (ja)
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JP2008289047A5 (enExample
JP2008289047A (ja
Inventor
耕司 川口
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 JP2007134058A priority Critical patent/JP4960764B2/ja
Priority to PCT/JP2008/058919 priority patent/WO2008143124A1/ja
Publication of JP2008289047A publication Critical patent/JP2008289047A/ja
Publication of JP2008289047A5 publication Critical patent/JP2008289047A5/ja
Application granted granted Critical
Publication of JP4960764B2 publication Critical patent/JP4960764B2/ja
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Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Control Of Voltage And Current In General (AREA)
JP2007134058A 2007-05-21 2007-05-21 増幅器 Active JP4960764B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2007134058A JP4960764B2 (ja) 2007-05-21 2007-05-21 増幅器
PCT/JP2008/058919 WO2008143124A1 (ja) 2007-05-21 2008-05-15 増幅器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007134058A JP4960764B2 (ja) 2007-05-21 2007-05-21 増幅器

Publications (3)

Publication Number Publication Date
JP2008289047A JP2008289047A (ja) 2008-11-27
JP2008289047A5 JP2008289047A5 (enExample) 2009-10-22
JP4960764B2 true JP4960764B2 (ja) 2012-06-27

Family

ID=40031832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007134058A Active JP4960764B2 (ja) 2007-05-21 2007-05-21 増幅器

Country Status (2)

Country Link
JP (1) JP4960764B2 (enExample)
WO (1) WO2008143124A1 (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5554196B2 (ja) * 2009-10-23 2014-07-23 ローム株式会社 初段増幅回路およびそれを用いた電子機器
DE102011054060B4 (de) 2011-09-29 2017-09-21 D&B Audiotechnik Gmbh Audioverstärker
KR101157993B1 (ko) 2011-12-22 2012-06-25 제이디미디어 주식회사 출력제어기능을 갖는 디지털 앰프
US10116215B2 (en) 2014-02-04 2018-10-30 Cirrus Logic, Inc. Buck-boost converter for an audio amplifier with multiple operations modes
WO2015171935A1 (en) * 2014-05-08 2015-11-12 Cirrus Logic, Inc. Switched mode amplifier with single-ended buck mode
US9628033B2 (en) 2014-10-29 2017-04-18 Cirrus Logic, Inc. Power stage with switched mode amplifier and linear amplifier
JP2021175147A (ja) 2020-04-30 2021-11-01 株式会社村田製作所 負荷検出回路、および、増幅回路

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06188660A (ja) * 1992-12-16 1994-07-08 Nec Eng Ltd 電力増幅回路
JP2004215078A (ja) * 2003-01-07 2004-07-29 Roland Corp Ｄ級電力増幅装置
JP2007074431A (ja) * 2005-09-07 2007-03-22 Flying Mole Corp 保護回路

Also Published As

Publication number Publication date
WO2008143124A1 (ja) 2008-11-27
JP2008289047A (ja) 2008-11-27

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