GB868704A - Improvements relating to temperature stabilisation of transistor amplifiers - Google Patents

Improvements relating to temperature stabilisation of transistor amplifiers

Info

Publication number
GB868704A
GB868704A GB2654057A GB2654057A GB868704A GB 868704 A GB868704 A GB 868704A GB 2654057 A GB2654057 A GB 2654057A GB 2654057 A GB2654057 A GB 2654057A GB 868704 A GB868704 A GB 868704A
Authority
GB
United Kingdom
Prior art keywords
stage
stabilize
changes
stages
feedback
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
GB2654057A
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Publication of GB868704A publication Critical patent/GB868704A/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
    • 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
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/26—Push-pull amplifiers; Phase-splitters therefor

Abstract

868,704. Stabilizing transistor amplifiers. TELEFUNKEN G.m.b.H. Aug. 22, 1957 [Aug. 23, 1956], No. 26540/57. Class 40(6) In a three-stage transistor amplifier D.C. negative feedback is applied around the first two stages to partially stabilize the transistor currents and the residual changes of output current of the second stage with changes in temperature are used to stabilize the third stage..In the Figure the stages are transformer coupled, additional windings being provided to supply negative signal frequency feedback to the respective emitters. Negative D.C. feedback is provided between the emitter of the second stage and the base of the first to partially stabilize the currents with changes in temperature and supply voltage. The residual changes in collector current of the second stage are sufficient to supply a varying bias voltage through a potentiometer 11 to stabilize the third stage. In an alternative embodiment (Fig. 1 not shown) resistance coupling between the first two stages is provided.
GB2654057A 1956-08-23 1957-08-22 Improvements relating to temperature stabilisation of transistor amplifiers Expired GB868704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET12582A DE1027728B (en) 1956-08-23 1956-08-23 Transistor low-frequency amplifier with compensation for the effect of temperature changes on the operating point of its output stage

Publications (1)

Publication Number Publication Date
GB868704A true GB868704A (en) 1961-05-25

Family

ID=7547064

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2654057A Expired GB868704A (en) 1956-08-23 1957-08-22 Improvements relating to temperature stabilisation of transistor amplifiers

Country Status (2)

Country Link
DE (1) DE1027728B (en)
GB (1) GB868704A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1191425B (en) * 1958-12-24 1965-04-22 Telefunken Patent Two-stage, galvanically coupled transistor amplifier in emitter circuit
DE1188143B (en) * 1963-10-08 1965-03-04 Siemens Ag AC voltage amplifier with transistors connected in parallel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT185406B (en) * 1953-06-09 1956-04-25 Philips Nv Counter-coupled transistor amplifier
GB770200A (en) * 1953-07-24 1957-03-20 Rca Corp Temperature controlled semi-conductor bias circuit
BE535593A (en) * 1954-02-10

Also Published As

Publication number Publication date
DE1027728B (en) 1958-04-10

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