GB852059A - Transistorised amplifier circuits - Google Patents

Transistorised amplifier circuits

Info

Publication number
GB852059A
GB852059A GB14960/59A GB1496059A GB852059A GB 852059 A GB852059 A GB 852059A GB 14960/59 A GB14960/59 A GB 14960/59A GB 1496059 A GB1496059 A GB 1496059A GB 852059 A GB852059 A GB 852059A
Authority
GB
United Kingdom
Prior art keywords
diodes
negative
amplifier circuits
emitter
series
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
GB14960/59A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB852059A publication Critical patent/GB852059A/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
    • H03G1/0052—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using diodes

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

852,059. Automatic volume control. STANDARD TELEPHONES ,& CABLES Ltd. May 1, 1959 [May 5, 1958], No. 14960/59. Class 40 (4). [Also in Group XL (c)] The gain of a transistor amplifier is controlled by variation of the amount of negative .feedback. As applied to automatic contrast compression, common-emitter connected stages E1-E3 are each provided with a negative feedback resistor Re in the emitter circuit which is shunted for A.C. by a condenser CC in series with a diode D. The diodes form variable shunting impedances the impedance being varied by D.C. derived over series resistors RV from a rectifier D4 connected to a tertiary winding on the output transformer TR2. The initial bias of the diodes D in the absence of a signal is determined by a potentiometer Rp, Rq across the-power, supply, to which the diodes are returned. Specification 807,815 is referred to.
GB14960/59A 1958-05-05 1959-05-01 Transistorised amplifier circuits Expired GB852059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1195610T 1958-05-05

Publications (1)

Publication Number Publication Date
GB852059A true GB852059A (en) 1960-10-19

Family

ID=9668804

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14960/59A Expired GB852059A (en) 1958-05-05 1959-05-01 Transistorised amplifier circuits

Country Status (2)

Country Link
FR (1) FR1195610A (en)
GB (1) GB852059A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166719A (en) * 1961-03-07 1965-01-19 Warwick Electronics Inc Transistorized sliding class a amplifier
US3200344A (en) * 1961-12-21 1965-08-10 Ibm Dynamic compression circuit with controlled clipping
US3339147A (en) * 1965-01-14 1967-08-29 Kollsman Instr Corp A-c amplifier linearly controlled by a d-c signal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151283B (en) * 1960-06-27 1963-07-11 Seismos G M B H Control arrangement for seismic transistor amplifiers
DE1132975B (en) * 1960-11-23 1962-07-12 Wolfgang Assmann G M B H Control circuit for transistorized amplifiers
US3163828A (en) * 1961-12-04 1964-12-29 Avco Corp Gain compressed amplifier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166719A (en) * 1961-03-07 1965-01-19 Warwick Electronics Inc Transistorized sliding class a amplifier
US3200344A (en) * 1961-12-21 1965-08-10 Ibm Dynamic compression circuit with controlled clipping
US3339147A (en) * 1965-01-14 1967-08-29 Kollsman Instr Corp A-c amplifier linearly controlled by a d-c signal

Also Published As

Publication number Publication date
FR1195610A (en) 1959-11-18

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