CN102859868B - 数字放大器 - Google Patents

数字放大器 Download PDF

Info

Publication number
CN102859868B
CN102859868B CN201180010215.6A CN201180010215A CN102859868B CN 102859868 B CN102859868 B CN 102859868B CN 201180010215 A CN201180010215 A CN 201180010215A CN 102859868 B CN102859868 B CN 102859868B
Authority
CN
China
Prior art keywords
output
current
circuit
signal
resonance
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.)
Expired - Fee Related
Application number
CN201180010215.6A
Other languages
English (en)
Chinese (zh)
Other versions
CN102859868A (zh
Inventor
菅原宙
佐佐木寿幸
庭山茂树
前田佳树
高野智臣
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of CN102859868A publication Critical patent/CN102859868A/zh
Application granted granted Critical
Publication of CN102859868B publication Critical patent/CN102859868B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H03F3/20—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
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • 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
    • H03F2200/351—Pulse width modulation being used in an amplifying circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/426—Indexing scheme relating to amplifiers the amplifier comprising circuitry for protection against overload

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
CN201180010215.6A 2010-02-18 2011-02-04 数字放大器 Expired - Fee Related CN102859868B (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2010-033362 2010-02-18
JP2010033362A JP5430438B2 (ja) 2010-02-18 2010-02-18 デジタルアンプ
PCT/JP2011/000648 WO2011102092A1 (ja) 2010-02-18 2011-02-04 デジタルアンプ

Publications (2)

Publication Number Publication Date
CN102859868A CN102859868A (zh) 2013-01-02
CN102859868B true CN102859868B (zh) 2015-05-20

Family

ID=44482700

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201180010215.6A Expired - Fee Related CN102859868B (zh) 2010-02-18 2011-02-04 数字放大器

Country Status (3)

Country Link
JP (1) JP5430438B2 (enExample)
CN (1) CN102859868B (enExample)
WO (1) WO2011102092A1 (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103296982B (zh) * 2012-02-27 2016-10-05 无锡华润矽科微电子有限公司 D类音频功率放大电路中实现自适应功能的电路结构
JP5638597B2 (ja) * 2012-12-27 2014-12-10 株式会社東芝 デジタル振幅変調装置及びデジタル振幅変調制御方法
GB2510396A (en) * 2013-02-01 2014-08-06 Nujira Ltd Controlling resonance in an envelope tracking power supply
US9647612B2 (en) 2014-09-30 2017-05-09 JVC Kenwood Corporation Power amplifying apparatus and power amplifying method
JP7173800B2 (ja) * 2018-09-12 2022-11-16 ラピスセミコンダクタ株式会社 半導体装置および音出力装置
KR102081971B1 (ko) * 2018-11-13 2020-02-26 한국항공우주연구원 음향시험용 가진소스 보호 장치 및 방법
KR101992293B1 (ko) * 2019-01-02 2019-06-26 (주)하이텍영상 실시간 검출이 가능한 디지털앰프장치 및 이를 이용한 자동전환 방송시스템
KR102214729B1 (ko) * 2019-01-11 2021-02-10 박창길 비상 방송 제어 시스템
TWI724980B (zh) * 2020-10-14 2021-04-11 立積電子股份有限公司 放大電路

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003037452A (ja) * 2001-07-26 2003-02-07 Denon Ltd 増幅器の保護回路
JP2004254021A (ja) * 2003-02-19 2004-09-09 Rohm Co Ltd 増幅器の保護方法及び、増幅器を備えた半導体装置
JP2005203968A (ja) * 2004-01-14 2005-07-28 Denon Ltd デジタルアンプの保護装置
JP2007258903A (ja) * 2006-03-22 2007-10-04 Toa Corp 共振電流検出装置及びデジタルアンプの保護装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07146722A (ja) * 1993-10-01 1995-06-06 Fuji Electric Co Ltd トランジスタ用過電流保護装置
JP4929208B2 (ja) * 2008-02-29 2012-05-09 三菱重工業株式会社 磁気軸受装置
JP2009260834A (ja) * 2008-04-18 2009-11-05 Sony Corp 過電流保護回路及びｄ級アンプ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003037452A (ja) * 2001-07-26 2003-02-07 Denon Ltd 増幅器の保護回路
JP2004254021A (ja) * 2003-02-19 2004-09-09 Rohm Co Ltd 増幅器の保護方法及び、増幅器を備えた半導体装置
JP2005203968A (ja) * 2004-01-14 2005-07-28 Denon Ltd デジタルアンプの保護装置
JP2007258903A (ja) * 2006-03-22 2007-10-04 Toa Corp 共振電流検出装置及びデジタルアンプの保護装置

Also Published As

Publication number Publication date
JP5430438B2 (ja) 2014-02-26
JP2011171967A (ja) 2011-09-01
WO2011102092A1 (ja) 2011-08-25
CN102859868A (zh) 2013-01-02

Similar Documents

Publication Publication Date Title
CN102859868B (zh) 数字放大器
US20120014025A1 (en) Overcurrent protection circuit and semiconductor device
KR101606441B1 (ko) 전력 증폭기의 전원 온/오프시 출력단과 스피커 보호회로
US20080043391A1 (en) Timer reset circuit for overcurrent protection of switching power amplifier
JP2007082036A (ja) 半導体集積回路装置、電源装置、電気機器
JPWO2004010575A1 (ja) パワーアンプ装置
US20110216920A1 (en) Speaker drive integrated circuit
US6603353B2 (en) Switching power amplifier
JP6245375B2 (ja) レベルシフト回路
JP6330364B2 (ja) 増幅回路の保護回路
JP4408912B2 (ja) Ｄ級増幅回路
US7495509B2 (en) Audio power amplifier
JP2002171749A (ja) 過電流保護機能を有するスイッチングレギュレータおよびそれを用いた電子機器
JP3102781B2 (ja) パルス幅変調増幅回路
JP2009219015A (ja) 過電流保護回路及びｄ級アンプ
JP2007222000A (ja) 過電流保護機能を有するスイッチングレギュレータおよびそれを用いた電子機器
WO2007140392A2 (en) Methods and apparatus to provide slew enhancement for low power amplifiers
JP6719346B2 (ja) 車両用電子装置
KR100402958B1 (ko) 무정지 2중화 구내방송 시스템
JP2009253562A (ja) 電力増幅装置
KR101731519B1 (ko) 전원공급장치 및 그를 이용한 전원공급방법
KR101446252B1 (ko) 입력신호를 감지하여 pwm 신호를 제어하는 회로를 구비한 앰프
JP2012209770A (ja) 固定音発生装置及びスイッチング増幅器
JP2009260835A (ja) 過電流保護回路及びｄ級アンプ
JP2008219547A (ja) アンプの過電流保護装置

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20150915

Address after: Osaka

Patentee after: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co.,Ltd.

Address before: Osaka

Patentee before: Matsushita Electric Industrial Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150520

Termination date: 20220204