GB618259A - Improvements in or relating to thermionic amplifiers - Google Patents

Improvements in or relating to thermionic amplifiers

Info

Publication number
GB618259A
GB618259A GB17265/46A GB1726546A GB618259A GB 618259 A GB618259 A GB 618259A GB 17265/46 A GB17265/46 A GB 17265/46A GB 1726546 A GB1726546 A GB 1726546A GB 618259 A GB618259 A GB 618259A
Authority
GB
United Kingdom
Prior art keywords
valve
amplifier
june
resistance
voltage drop
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
GB17265/46A
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 GB618259A publication Critical patent/GB618259A/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
    • H03F1/42—Modifications of amplifiers to extend the bandwidth
    • H03F1/48—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers
    • H03F1/50—Modifications of amplifiers to extend the bandwidth of aperiodic amplifiers with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—Dc amplifiers in which all stages are dc-coupled
    • H03F3/36—Dc amplifiers in which all stages are dc-coupled with tubes only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/42—Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers
    • H03F3/44—Amplifiers with two or more amplifying elements having their dc paths in series with the load, the control electrode of each element being excited by at least part of the input signal, e.g. so-called totem-pole amplifiers with tubes only

Abstract

618,259. Thermionic valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. June 6, 1946, No. 17265. Convention date, June 26, 1945. [Class 40 (vi)] The anode circuit of an amplifier valve V1 includes an additional valve V2 with high internal A.C. resistance and low internal D.C. resistance, so that the D.C. voltage drop in the anode circuit remains small when the amplifier is working into a high impedance external load. The external load may be connected between the anodes of the valves V1, V2 or between the anode of the amplifier valve V and the negative H.T. terminal. The two outputs are of opposite phase and may be used simultaneously. Negative feedback to the additional valve V2 is provided by resistors R1, R2, R3 and condenser C1. The bias voltages for the screen and control grid of each pentode valve V1, V2 may be provided by the voltage drop across suitable resistances or by a separate battery.
GB17265/46A 1945-06-26 1946-06-06 Improvements in or relating to thermionic amplifiers Expired GB618259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE618259X 1945-06-26

Publications (1)

Publication Number Publication Date
GB618259A true GB618259A (en) 1949-02-18

Family

ID=3875573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17265/46A Expired GB618259A (en) 1945-06-26 1946-06-06 Improvements in or relating to thermionic amplifiers

Country Status (3)

Country Link
BE (1) BE459090A (en)
FR (1) FR950749A (en)
GB (1) GB618259A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512017A (en) * 1951-06-12

Also Published As

Publication number Publication date
BE459090A (en)
FR950749A (en) 1949-10-05

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