FR2293128A7 - Digital power amplifier for use with fluctuating DC supplies - has capacitor holding transistor energised even when supply drops to zero - Google Patents

Digital power amplifier for use with fluctuating DC supplies - has capacitor holding transistor energised even when supply drops to zero

Info

Publication number
FR2293128A7
FR2293128A7 FR7536127A FR7536127A FR2293128A7 FR 2293128 A7 FR2293128 A7 FR 2293128A7 FR 7536127 A FR7536127 A FR 7536127A FR 7536127 A FR7536127 A FR 7536127A FR 2293128 A7 FR2293128 A7 FR 2293128A7
Authority
FR
France
Prior art keywords
fluctuating
power amplifier
transistor
digital power
zero
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
Application number
FR7536127A
Other languages
French (fr)
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Application granted granted Critical
Publication of FR2293128A7 publication Critical patent/FR2293128A7/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads

Landscapes

  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)
  • Rectifiers (AREA)
  • Amplifiers (AREA)

Abstract

The digital power amplifier has a transistor collector/emitter path coupled in series with the inductive load across a bridge rectifier output. The transistor base is connected to a chain of three resistors, a diode and a switch. The switch connects the diode end of the chain to one direct current supply pole. A second switch, synchronised with the first one, connects part of the chain over a capacitor to the other direct current supply pole. The capacitor (11) acts as an intermediate energy store for the transistor control signals such that the transistor (1) remains on even when the fluctuating direct current supply reaches zero.
FR7536127A 1974-11-28 1975-11-26 Digital power amplifier for use with fluctuating DC supplies - has capacitor holding transistor energised even when supply drops to zero Expired FR2293128A7 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742456190 DE2456190C3 (en) 1974-11-28 1974-11-28 Transistor power switching amplifier

Publications (1)

Publication Number Publication Date
FR2293128A7 true FR2293128A7 (en) 1976-06-25

Family

ID=5931902

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7536127A Expired FR2293128A7 (en) 1974-11-28 1975-11-26 Digital power amplifier for use with fluctuating DC supplies - has capacitor holding transistor energised even when supply drops to zero

Country Status (3)

Country Link
CH (1) CH596714A5 (en)
DE (1) DE2456190C3 (en)
FR (1) FR2293128A7 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1638260C3 (en) * 1968-01-02 1975-04-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Circuit arrangement for reducing the switching losses of a switching transistor in the power circuit of a switching regulator

Also Published As

Publication number Publication date
CH596714A5 (en) 1978-03-15
DE2456190A1 (en) 1976-08-12
DE2456190B2 (en) 1981-07-02
DE2456190C3 (en) 1982-03-04

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