GB1283170A - A bias device for amplifier transistors - Google Patents

A bias device for amplifier transistors

Info

Publication number
GB1283170A
GB1283170A GB2253271A GB2253271A GB1283170A GB 1283170 A GB1283170 A GB 1283170A GB 2253271 A GB2253271 A GB 2253271A GB 2253271 A GB2253271 A GB 2253271A GB 1283170 A GB1283170 A GB 1283170A
Authority
GB
United Kingdom
Prior art keywords
transistor
voltage
input
terminal
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.)
Expired
Application number
GB2253271A
Inventor
Pierre Le Seigneur
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 CSF SA filed Critical Thomson CSF SA
Publication of GB1283170A publication Critical patent/GB1283170A/en
Expired 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
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor 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
    • H03F1/02—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
    • H03F1/0261—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 polarisation voltage or current, e.g. gliding Class A

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

1283170 Transistor amplifying circuits THOMSON-CSF 19 April 1971 [27 Feb 1970] 22532/71 Heading H3T A transistor amplifier is biased by the combination of a thermally-dependent voltage and a voltage proportional to the power dissipated in the transistor. Transistor amplifier 1, Fig. 1, receives signal at terminal E, bias at terminal 2, and provides an output at terminal S. The bias at terminal 2 comprises the output of a differential amplifier 3, the input at the in-phase input 4 of which comprises the sum of the voltage from an adjustable bias source 5 and the voltage from reference voltage 7 which comprises a junction diode heated in the neighbourhood of the transistor 1. The input at the out-of-phase input 9 is derived over an R.C. modulating circuit 10 from the output of a multiplier 11, the two inputs 12, 13 of which respectively comprise a voltage proportional to the current in and voltage across, amplifier 1. The input 12 may be derived from a differential amplifier 50, Fig. 2, the inputs of which are connected across a resistor 24 of small value in the collector circuit of transistor 20, while input 13 is derived from potentiometer 13, connected between the collector of transistor 21 via diode rectifier 26 and one end of resistor 24.
GB2253271A 1970-02-27 1971-04-19 A bias device for amplifier transistors Expired GB1283170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7007188A FR2080248A5 (en) 1970-02-27 1970-02-27

Publications (1)

Publication Number Publication Date
GB1283170A true GB1283170A (en) 1972-07-26

Family

ID=9051422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2253271A Expired GB1283170A (en) 1970-02-27 1971-04-19 A bias device for amplifier transistors

Country Status (5)

Country Link
BE (1) BE763097A (en)
DE (1) DE2109221A1 (en)
FR (1) FR2080248A5 (en)
GB (1) GB1283170A (en)
NL (1) NL7102627A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU690175B2 (en) * 1994-02-11 1998-04-23 Alcatel N.V. Power amplifier for mobile station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU690175B2 (en) * 1994-02-11 1998-04-23 Alcatel N.V. Power amplifier for mobile station

Also Published As

Publication number Publication date
NL7102627A (en) 1971-08-31
BE763097A (en) 1971-07-16
DE2109221A1 (en) 1971-09-09
FR2080248A5 (en) 1971-11-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees