GB2421648B - Amplifier fault detection circuit - Google Patents

Amplifier fault detection circuit

Info

Publication number
GB2421648B
GB2421648B GB0428211A GB0428211A GB2421648B GB 2421648 B GB2421648 B GB 2421648B GB 0428211 A GB0428211 A GB 0428211A GB 0428211 A GB0428211 A GB 0428211A GB 2421648 B GB2421648 B GB 2421648B
Authority
GB
United Kingdom
Prior art keywords
detection circuit
fault detection
amplifier fault
amplifier
circuit
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 - Lifetime
Application number
GB0428211A
Other languages
English (en)
Other versions
GB2421648A (en
GB0428211D0 (en
Inventor
Robert Watts
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.)
Zetex PLC
Original Assignee
Zetex PLC
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 Zetex PLC filed Critical Zetex PLC
Priority to GB0428211A priority Critical patent/GB2421648B/en
Publication of GB0428211D0 publication Critical patent/GB0428211D0/en
Priority to JP2005370660A priority patent/JP5386665B2/ja
Priority to US11/316,319 priority patent/US7484139B2/en
Publication of GB2421648A publication Critical patent/GB2421648A/en
Application granted granted Critical
Publication of GB2421648B publication Critical patent/GB2421648B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H03F3/20—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
    • 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
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • 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
    • H03F3/2175—Class D power amplifiers; Switching amplifiers using analogue-digital or digital-analogue conversion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/331—Sigma delta modulation being used in an amplifying circuit
    • 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)
GB0428211A 2004-12-23 2004-12-23 Amplifier fault detection circuit Expired - Lifetime GB2421648B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0428211A GB2421648B (en) 2004-12-23 2004-12-23 Amplifier fault detection circuit
JP2005370660A JP5386665B2 (ja) 2004-12-23 2005-12-22 アンプ故障検出回路
US11/316,319 US7484139B2 (en) 2004-12-23 2005-12-22 Amplifier fault detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0428211A GB2421648B (en) 2004-12-23 2004-12-23 Amplifier fault detection circuit

Publications (3)

Publication Number Publication Date
GB0428211D0 GB0428211D0 (en) 2005-01-26
GB2421648A GB2421648A (en) 2006-06-28
GB2421648B true GB2421648B (en) 2009-01-07

Family

ID=34113149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0428211A Expired - Lifetime GB2421648B (en) 2004-12-23 2004-12-23 Amplifier fault detection circuit

Country Status (3)

Country Link
US (1) US7484139B2 (enExample)
JP (1) JP5386665B2 (enExample)
GB (1) GB2421648B (enExample)

Families Citing this family (18)

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CN101379698B (zh) * 2006-02-07 2012-04-18 D2音频有限公司 用于提高数字放大器中的反馈和/或前馈子系统的稳定性的系统和方法
US8456169B2 (en) * 2010-01-13 2013-06-04 International Business Machines Corporation High speed measurement of random variation/yield in integrated circuit device testing
KR101041714B1 (ko) * 2011-01-25 2011-06-14 한국수력원자력 주식회사 프로그래머블 논리 소자에 기반한 독립형 제어 모듈
WO2012158938A1 (en) * 2011-05-18 2012-11-22 Petra Solar, Inc. Method and system for managing feedback signal acquisition in a power controller
GB2550243B (en) 2014-08-29 2018-03-21 Cirrus Logic Int Semiconductor Ltd Class D amplifier circuit
US9306508B1 (en) * 2015-02-19 2016-04-05 King Fahd University Of Petroleum And Minerals Reconfigurable intergrator/differentiator circuit based on current follower
US10636285B2 (en) * 2017-06-14 2020-04-28 Allegro Microsystems, Llc Sensor integrated circuits and methods for safety critical applications
US10692362B2 (en) * 2017-06-14 2020-06-23 Allegro Microsystems, Llc Systems and methods for comparing signal channels having different common mode transient immunity
US10380879B2 (en) * 2017-06-14 2019-08-13 Allegro Microsystems, Llc Sensor integrated circuits and methods for safety critical applications
JP7199834B2 (ja) * 2018-05-24 2023-01-06 ラピスセミコンダクタ株式会社 半導体装置
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
JP7189033B2 (ja) * 2019-01-23 2022-12-13 ラピスセミコンダクタ株式会社 半導体装置及び音出力装置
KR102665443B1 (ko) * 2019-05-30 2024-05-09 삼성전자주식회사 반도체 장치
US11750992B2 (en) * 2020-09-17 2023-09-05 Texas Instruments Incorporated Integrated circuit with switching amplifier output fault detection
US12203822B2 (en) 2022-04-14 2025-01-21 Allegro Microsystems, Llc Heterogeneous magnetic and inductive sensors
US11719769B1 (en) 2022-06-14 2023-08-08 Allegro Microsystems, Llc Method and apparatus for sensor signal path diagnostics
KR102785189B1 (ko) * 2022-11-29 2025-03-21 주식회사 현대케피코 일체형 모터 제어기의 모터 사양식별 및 고장진단 장치와 방법
US12455178B2 (en) 2023-12-22 2025-10-28 Allegro Microsystems, Llc Inductive linear stroke sensor using dual tracks with different periodicity

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030122605A1 (en) * 1999-08-15 2003-07-03 Ulrick John W. Current limiting circuit
US6683494B2 (en) * 2001-03-26 2004-01-27 Harman International Industries, Incorporated Digital signal processor enhanced pulse width modulation amplifier
WO2004086609A1 (en) * 2003-03-21 2004-10-07 D2Audio Corporation Systems and methods for protection of audio amplifier circuits

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Publication number Priority date Publication date Assignee Title
JPS6128208A (ja) * 1984-07-18 1986-02-07 Iwatsu Electric Co Ltd レベル補償回路
JPH0637653A (ja) * 1992-07-15 1994-02-10 Nec Corp 送信機
US5974089A (en) 1997-07-22 1999-10-26 Tripath Technology, Inc. Method and apparatus for performance improvement by qualifying pulses in an oversampled noise-shaping signal processor
EP0968565A2 (en) 1998-01-22 2000-01-05 Koninklijke Philips Electronics N.V. Pwm amplifier
JP4223194B2 (ja) * 2001-01-31 2009-02-12 富士通株式会社 故障判定機能を備えた非線形歪補償送信装置
DE60234724D1 (de) * 2002-05-31 2010-01-21 Fujitsu Ltd Verzerrungskompensator
US6646501B1 (en) * 2002-06-25 2003-11-11 Nortel Networks Limited Power amplifier configuration
KR100498497B1 (ko) * 2003-05-10 2005-07-01 삼성전자주식회사 이상 상태에서 정상 상태로의 복귀 시에 발생되는 과도응답 현상을 방지하는 ｄ급 파워 증폭기 및 그 방법
US6987417B2 (en) * 2003-06-24 2006-01-17 Northrop Grumman Corpoation Polar and linear amplifier system
US7157969B2 (en) 2004-02-27 2007-01-02 Bhc Consulting Pty., Ltd. Low distortion class D amplifier using a controlled delay
GB2429351B (en) 2005-08-17 2009-07-08 Wolfson Microelectronics Plc Feedback controller for PWM amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030122605A1 (en) * 1999-08-15 2003-07-03 Ulrick John W. Current limiting circuit
US6683494B2 (en) * 2001-03-26 2004-01-27 Harman International Industries, Incorporated Digital signal processor enhanced pulse width modulation amplifier
WO2004086609A1 (en) * 2003-03-21 2004-10-07 D2Audio Corporation Systems and methods for protection of audio amplifier circuits

Also Published As

Publication number Publication date
GB2421648A (en) 2006-06-28
US20060195720A1 (en) 2006-08-31
US7484139B2 (en) 2009-01-27
JP5386665B2 (ja) 2014-01-15
GB0428211D0 (en) 2005-01-26
JP2006187002A (ja) 2006-07-13

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20120705 AND 20120711

PE20 Patent expired after termination of 20 years

Expiry date: 20241222