HK14496A - Circuit arrangement for the automatic adjustment of the steady current in a push-pull end stage - Google Patents

Circuit arrangement for the automatic adjustment of the steady current in a push-pull end stage

Info

Publication number
HK14496A
HK14496A HK14496A HK14496A HK14496A HK 14496 A HK14496 A HK 14496A HK 14496 A HK14496 A HK 14496A HK 14496 A HK14496 A HK 14496A HK 14496 A HK14496 A HK 14496A
Authority
HK
Hong Kong
Prior art keywords
push
frequency
differential amplifier
quiescent
circuit arrangement
Prior art date
Application number
HK14496A
Inventor
Friedrich Schmitz
Original Assignee
Thomson Brandt Gmbh
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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK14496A publication Critical patent/HK14496A/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor
    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply
    • 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/307—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in push-pull 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
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H03F1/3217—Modifications of amplifiers to reduce non-linear distortion in single ended push-pull 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Electronic Switches (AREA)

Abstract

2.1 The quiescent current of a push-pull output stage is automatically adjusted by providing a sensing element in each branch of the output stage. The two voltages measured across the sensing elements with respect to reference potential are input to a differential amplifier stage, the output voltage of which is compared with a reference value with the aid of a comparator. The circuit exhibits a frequency-dependence of the automatic quiescent-current regulation due to the cut-off frequency of the output transistors used. 2.2 To avoid this frequency-dependence, a phase-rotating section is connected to one input of the differential amplifier, which worsens the common-mode suppression of the differential amplifier at high frequencies. The result of this measure is that the frequency- dependent error is compensated. 2.3 Push-pull output stages with quiescent-current control. <IMAGE>
HK14496A 1987-09-30 1996-01-25 Circuit arrangement for the automatic adjustment of the steady current in a push-pull end stage HK14496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873732915 DE3732915A1 (en) 1986-09-20 1987-09-30 Circuit arrangement for automatically setting the quiescent current in a push-pull output stage

Publications (1)

Publication Number Publication Date
HK14496A true HK14496A (en) 1996-02-02

Family

ID=6337200

Family Applications (1)

Application Number Title Priority Date Filing Date
HK14496A HK14496A (en) 1987-09-30 1996-01-25 Circuit arrangement for the automatic adjustment of the steady current in a push-pull end stage

Country Status (7)

Country Link
EP (1) EP0309693B1 (en)
JP (1) JP2685102B2 (en)
KR (1) KR0130903B1 (en)
AT (1) ATE97274T1 (en)
DE (2) DE3732915A1 (en)
ES (1) ES2046258T3 (en)
HK (1) HK14496A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920802A1 (en) * 1989-06-24 1991-01-10 Telefunken Electronic Gmbh Push=pull amplifier circuit with rest current stabilisation - generates reference signal using control current and control signal derived from amplifier output currents
DE3920803C1 (en) * 1989-06-24 1990-12-20 Telefunken Electronic Gmbh, 7100 Heilbronn, De Push=pull amplifier with two output stages - has input difference stage and current or power source for setting closed circuit current and no-load amplification
JP2867756B2 (en) * 1991-08-30 1999-03-10 日本電気株式会社 Power consumption control device
WO2000011779A1 (en) * 1998-08-19 2000-03-02 Ryszard Parosa Circuit for precise sensing and regulation of quiescent dc current in transistor power amplifiers
SE527677C2 (en) * 2004-02-18 2006-05-09 Peter Sandquist Amplifier with low output impedance and low distortion

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434066A (en) * 1966-06-16 1969-03-18 Automatic Elect Lab Low-distortion bias-controlled transistor amplifier
US4207475A (en) * 1978-07-31 1980-06-10 Kepco, Inc. Efficient bipolar regulated power supply
US4263563A (en) * 1979-07-11 1981-04-21 National Semiconductor Corporation Amplifier output stage distortion reduction
JPS56160112A (en) * 1980-04-30 1981-12-09 Sony Corp Biasing circuit of electric power amplifier
DE3343110C1 (en) * 1983-11-29 1985-05-30 Deutsche Thomson-Brandt Gmbh, 7730 Villingen-Schwenningen Transformerless push-pull output stage
US4573021A (en) * 1984-03-22 1986-02-25 Widlar Robert J Circuit output stage arrangement

Also Published As

Publication number Publication date
ES2046258T3 (en) 1994-02-01
DE3732915A1 (en) 1989-04-13
JPH01109804A (en) 1989-04-26
EP0309693B1 (en) 1993-11-10
EP0309693A3 (en) 1990-01-24
ATE97274T1 (en) 1993-11-15
EP0309693A2 (en) 1989-04-05
DE3885560D1 (en) 1993-12-16
JP2685102B2 (en) 1997-12-03
KR0130903B1 (en) 1998-04-23
KR890005975A (en) 1989-05-18

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)