GB2512916A - Output stage for class AB amplifier - Google Patents

Output stage for class AB amplifier Download PDF

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Publication number
GB2512916A
GB2512916A GB1306621.2A GB201306621A GB2512916A GB 2512916 A GB2512916 A GB 2512916A GB 201306621 A GB201306621 A GB 201306621A GB 2512916 A GB2512916 A GB 2512916A
Authority
GB
United Kingdom
Prior art keywords
input
current
output
transistors
amplifier
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.)
Withdrawn
Application number
GB1306621.2A
Other languages
English (en)
Other versions
GB201306621D0 (en
Inventor
Martin Wilson
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.)
Nujira Ltd
Original Assignee
Nujira 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 Nujira Ltd filed Critical Nujira Ltd
Priority to GB1306621.2A priority Critical patent/GB2512916A/en
Publication of GB201306621D0 publication Critical patent/GB201306621D0/en
Priority to CN201480020192.0A priority patent/CN105122640B/zh
Priority to PCT/EP2014/057429 priority patent/WO2014167114A1/en
Priority to US14/775,157 priority patent/US9819309B2/en
Priority to KR1020157032094A priority patent/KR102234881B1/ko
Priority to JP2016506996A priority patent/JP6470736B2/ja
Priority to EP14716604.5A priority patent/EP2974009B1/en
Publication of GB2512916A publication Critical patent/GB2512916A/en
Withdrawn legal-status Critical Current

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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3022—CMOS common source output SEPP amplifiers
    • H03F3/3028—CMOS common source output SEPP amplifiers with symmetrical driving of the end stage
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3022—CMOS common source output SEPP amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only
    • H03F3/345—DC amplifiers in which all stages are DC-coupled with semiconductor devices only with field-effect devices
    • 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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
    • H03F1/0211—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers with control of the supply voltage or current
    • H03F1/0216—Continuous control
    • H03F1/0222—Continuous control by using a signal derived from the input signal
    • H03F1/0227—Continuous control by using a signal derived from the input signal using supply converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/252—Multiple switches coupled in the input circuit of an amplifier are controlled by a circuit, e.g. feedback circuitry being controlling the switch

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
GB1306621.2A 2013-04-11 2013-04-11 Output stage for class AB amplifier Withdrawn GB2512916A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1306621.2A GB2512916A (en) 2013-04-11 2013-04-11 Output stage for class AB amplifier
CN201480020192.0A CN105122640B (zh) 2013-04-11 2014-04-11 用于ab类放大器的输出级
PCT/EP2014/057429 WO2014167114A1 (en) 2013-04-11 2014-04-11 Output stage for class ab amplifier
US14/775,157 US9819309B2 (en) 2013-04-11 2014-04-11 Output stage for class AB amplifier
KR1020157032094A KR102234881B1 (ko) 2013-04-11 2014-04-11 클래스 ab 증폭기에 대한 출력 스테이지
JP2016506996A JP6470736B2 (ja) 2013-04-11 2014-04-11 Ａｂ級増幅器の出力段
EP14716604.5A EP2974009B1 (en) 2013-04-11 2014-04-11 Output stage for class ab amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1306621.2A GB2512916A (en) 2013-04-11 2013-04-11 Output stage for class AB amplifier

Publications (2)

Publication Number Publication Date
GB201306621D0 GB201306621D0 (en) 2013-05-29
GB2512916A true GB2512916A (en) 2014-10-15

Family

ID=48537120

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1306621.2A Withdrawn GB2512916A (en) 2013-04-11 2013-04-11 Output stage for class AB amplifier

Country Status (7)

Country Link
US (1) US9819309B2 (enExample)
EP (1) EP2974009B1 (enExample)
JP (1) JP6470736B2 (enExample)
KR (1) KR102234881B1 (enExample)
CN (1) CN105122640B (enExample)
GB (1) GB2512916A (enExample)
WO (1) WO2014167114A1 (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107834986B (zh) * 2017-11-21 2020-04-03 中国地质大学（北京） 单级ab类运算跨导放大器及模拟电路
JP7480473B2 (ja) * 2019-03-22 2024-05-10 ヤマハ株式会社 増幅回路
DE102022109563B3 (de) * 2022-04-20 2023-08-03 It'is Foundation Differentielle Strompufferschaltung und Stromquelle mit einer Solchen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162753A (en) * 1991-11-27 1992-11-10 At&T Bell Laboratories Amplifier arrangement for use as a line driver
US5856749A (en) * 1996-11-01 1999-01-05 Burr-Brown Corporation Stable output bias current circuitry and method for low-impedance CMOS output stage
US7583145B2 (en) * 2006-07-28 2009-09-01 Realtek Semiconductor Corp. Hybrid output stage apparatus and related method thereof

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5718107A (en) * 1980-07-09 1982-01-29 Nippon Gakki Seizo Kk Amplifying circuit
US4611180A (en) * 1985-01-09 1986-09-09 Crown International, Inc. Grounded bridge amplifier protection through transistor thermo protection
US5140282A (en) * 1990-04-27 1992-08-18 U.S. Philips Corporation Current amplifier arrangement
JP2762333B2 (ja) * 1992-12-22 1998-06-04 ローム株式会社 増幅回路及び信号増幅ｉｃ
JP3414899B2 (ja) * 1995-07-31 2003-06-09 ローム株式会社 オーディオ信号増幅回路およびこれを用いた音響機器
JPH09186577A (ja) * 1996-01-05 1997-07-15 Kawasaki Steel Corp 出力バッファ回路
US5659266A (en) 1996-01-16 1997-08-19 National Semiconductor Corporation Low volatage output stage with improved output drive
KR970063903A (ko) * 1996-02-15 1997-09-12 모리시다 요이치 연산증폭기
US6188284B1 (en) * 1999-04-23 2001-02-13 Lucent Technologies Inc. Distributed gain line driver amplifier including improved linearity
JP3528725B2 (ja) * 1999-12-01 2004-05-24 ヤマハ株式会社 電力増幅回路
US6466093B1 (en) 2000-09-19 2002-10-15 Texas Instruments Incorporated Low voltage low thd CMOS audio (power) amplifier
US6501334B1 (en) 2000-11-13 2002-12-31 Texas Instruments Incorporated Actively biased class AB output stage with low quiescent power, high output current drive and wide output voltage swing
JP3535836B2 (ja) * 2001-02-09 2004-06-07 Ｎｅｃエレクトロニクス株式会社 電力増幅回路
US6433637B1 (en) * 2001-03-23 2002-08-13 National Semiconductor Corporation Single cell rail-to-rail input/output operational amplifier
CN1173464C (zh) * 2001-09-25 2004-10-27 义隆电子股份有限公司 可低电压工作的运算放大器
US6583669B1 (en) * 2002-04-08 2003-06-24 National Semiconductor Corporation Apparatus and method for a compact class AB turn-around stage with low noise, low offset, and low power consumption
JP4443889B2 (ja) * 2003-10-14 2010-03-31 旭化成エレクトロニクス株式会社 差動増幅器
JP4789136B2 (ja) * 2005-04-07 2011-10-12 ルネサスエレクトロニクス株式会社 演算増幅器
CN100578924C (zh) * 2007-07-03 2010-01-06 华为技术有限公司 输出级电路、功率放大电路及电信号的处理方法
JP5606345B2 (ja) * 2011-01-25 2014-10-15 セイコーインスツル株式会社 出力回路
DE102018111042A1 (de) 2018-05-08 2019-11-14 Hema Maschinen- Und Apparateschutz Gmbh Längenvariable Schutzabdeckung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5162753A (en) * 1991-11-27 1992-11-10 At&T Bell Laboratories Amplifier arrangement for use as a line driver
US5856749A (en) * 1996-11-01 1999-01-05 Burr-Brown Corporation Stable output bias current circuitry and method for low-impedance CMOS output stage
US7583145B2 (en) * 2006-07-28 2009-09-01 Realtek Semiconductor Corp. Hybrid output stage apparatus and related method thereof

Also Published As

Publication number Publication date
GB201306621D0 (en) 2013-05-29
CN105122640A (zh) 2015-12-02
US20160036387A1 (en) 2016-02-04
WO2014167114A1 (en) 2014-10-16
CN105122640B (zh) 2018-06-22
KR102234881B1 (ko) 2021-03-31
JP2016516374A (ja) 2016-06-02
JP6470736B2 (ja) 2019-02-13
EP2974009A1 (en) 2016-01-20
US9819309B2 (en) 2017-11-14
EP2974009B1 (en) 2017-06-28
KR20150140795A (ko) 2015-12-16

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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 20160519 AND 20160525

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)