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GB876994A - Improvements in or relating to negative feedback circuits - Google Patents

Improvements in or relating to negative feedback circuits

Info

Publication number
GB876994A
GB876994A GB1743658A GB1743658A GB876994A GB 876994 A GB876994 A GB 876994A GB 1743658 A GB1743658 A GB 1743658A GB 1743658 A GB1743658 A GB 1743658A GB 876994 A GB876994 A GB 876994A
Authority
GB
United Kingdom
Prior art keywords
transistor
negative feedback
relating
base
potentiometer
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
GB1743658A
Inventor
Frederick Leslie Coombs
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.)
British Broadcasting Corp
Original Assignee
British Broadcasting Corp
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 British Broadcasting Corp filed Critical British Broadcasting Corp
Priority to GB1743658A priority Critical patent/GB876994A/en
Publication of GB876994A publication Critical patent/GB876994A/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
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/0082—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using bipolar transistor-type devices

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

876,994. Volume control. BRITISH BROADCASTING CORPORATION. April 8, 1959 [May 30, 1958], No. 17436/58. Class 40 (4). [Also in Group XL (c)] A transistor amplifier of variable gain comprises a transistor T1 in grounded emitter connection having a second transistor T2 connected in its emitter lead and functioning as a controllable resistance giving variable negative feedback. The base of the transistor T2 is connected via resistor R3, across which the gain control potential is produced, to a point on a bias potentiometer R4, R5 which together with the potentiometer R1, R2 biasing the base of the transistor T1, determines the static conditions of the arrangement.
GB1743658A 1958-05-30 1958-05-30 Improvements in or relating to negative feedback circuits Expired GB876994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1743658A GB876994A (en) 1958-05-30 1958-05-30 Improvements in or relating to negative feedback circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1743658A GB876994A (en) 1958-05-30 1958-05-30 Improvements in or relating to negative feedback circuits

Publications (1)

Publication Number Publication Date
GB876994A true GB876994A (en) 1961-09-13

Family

ID=10095160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1743658A Expired GB876994A (en) 1958-05-30 1958-05-30 Improvements in or relating to negative feedback circuits

Country Status (1)

Country Link
GB (1) GB876994A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4731251U (en) * 1971-04-27 1972-12-08
JPS50131441A (en) * 1974-04-03 1975-10-17
JPS5133389B1 (en) * 1970-11-16 1976-09-18

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133389B1 (en) * 1970-11-16 1976-09-18
JPS4731251U (en) * 1971-04-27 1972-12-08
JPS50131441A (en) * 1974-04-03 1975-10-17
JPS5419133B2 (en) * 1974-04-03 1979-07-12

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