GB885811A - Improvements in or relating to transistor amplifier circuit arrangements - Google Patents

Improvements in or relating to transistor amplifier circuit arrangements

Info

Publication number
GB885811A
GB885811A GB35855/60A GB3585560A GB885811A GB 885811 A GB885811 A GB 885811A GB 35855/60 A GB35855/60 A GB 35855/60A GB 3585560 A GB3585560 A GB 3585560A GB 885811 A GB885811 A GB 885811A
Authority
GB
United Kingdom
Prior art keywords
transistor
resistor
gain
base
signal
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
GB35855/60A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB885811A publication Critical patent/GB885811A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers

Abstract

885,811. Transistor amplifying circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 19, 1960 [Oct. 22, 1959], No. 35855/60. Class 40(6). A gain control arrangement comprises a pair of transistors with a common emitter resistance 3 and with the signal applied to the bases of both. A gain-controlling current is applied to the base of the first transistor 1 and the signal is taken from the collector circuit of the other, across a resistor 6; the base potential of this transistor is maintained constant by means of a potentiometer 7, 8. In addition a self-bias resistor 10 decoupled by condenser 9 may be placed in the emitter lead; this is stated to allow of a lower value to be assigned to resistors 7, 8 thus improving the thermal stability of transistor 2. The arrangement is such that an increase in the control current to the base of the transistor 1 increases the D.C. voltage across resistor 3, so biasing transistor 2 back to a region of lesser gain, and at the same time increase in gain of transistor 1 produces a larger signal across resistor 3, so reducing the signal between base and emitter of transistor 2.
GB35855/60A 1959-10-22 1960-10-19 Improvements in or relating to transistor amplifier circuit arrangements Expired GB885811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN17410A DE1164497B (en) 1959-10-22 1959-10-22 Adjustable transistor circuit

Publications (1)

Publication Number Publication Date
GB885811A true GB885811A (en) 1961-12-28

Family

ID=7340397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35855/60A Expired GB885811A (en) 1959-10-22 1960-10-19 Improvements in or relating to transistor amplifier circuit arrangements

Country Status (3)

Country Link
DE (1) DE1164497B (en)
FR (1) FR1275088A (en)
GB (1) GB885811A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278524B (en) * 1965-04-09 1968-09-26 Standard Elektrik Lorenz Ag Adjustable transistor stage for the power amplification of signals
DE1257854B (en) * 1965-08-11 1968-01-04 Messerschmitt Boelkow Blohm Controllable AC amplifier with transistors, which comprises a differential amplifier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT179319B (en) * 1951-09-14 1954-08-10 Int Standard Electric Corp Circuit arrangement for gain control
US2903522A (en) * 1955-07-07 1959-09-08 Gen Precision Lab Inc Transistor amplifier
DE1039099B (en) * 1956-04-20 1958-09-18 Nordwestdeutscher Rundfunk I L Counter-coupled tube amplifier stage with regulation of the degree of amplification by changing the control grid prestress

Also Published As

Publication number Publication date
DE1164497B (en) 1964-03-05
FR1275088A (en) 1961-11-03

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