GB388766A - Improvements in or relating to thermionic valve amplifiers - Google Patents

Improvements in or relating to thermionic valve amplifiers

Info

Publication number
GB388766A
GB388766A GB24568/31A GB2456831A GB388766A GB 388766 A GB388766 A GB 388766A GB 24568/31 A GB24568/31 A GB 24568/31A GB 2456831 A GB2456831 A GB 2456831A GB 388766 A GB388766 A GB 388766A
Authority
GB
United Kingdom
Prior art keywords
limb
winding
sept
flux
controlled
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
GB24568/31A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB388766A publication Critical patent/GB388766A/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
    • H03G1/0076—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using galvanomagnetic elements

Landscapes

  • Interface Circuits In Exchanges (AREA)

Abstract

388,766. Valve amplifying circuits. ASSOCIATED TELEPHONE & TELEGRAPH CO., 1033, West Van Buren Street, Chicago, U.S.A. Sept. 1, 1931, No. 24568. Convention date, Sept. 5, 1930. [Class 40 (v).] The input volume to a thermionic amplifier is controlled while presenting a constant impedance to the incoming circuit by means of a transformer having a three-limbed core. The flux through the secondary 11 is controlled by a variable resistance 9 which by short-circuiting winding 7 deflects flux from the limb 3 to the limb 6 and therefore from the secondary 11 to reduce volume. In a modification, Fig. 2 (not shown), the primary winding is wound on the centre limb and the volume adjusting windings on the outer limbs one of which also carries the secondary winding.
GB24568/31A 1930-09-05 1931-09-01 Improvements in or relating to thermionic valve amplifiers Expired GB388766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US388766XA 1930-09-05 1930-09-05

Publications (1)

Publication Number Publication Date
GB388766A true GB388766A (en) 1933-03-01

Family

ID=21902407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24568/31A Expired GB388766A (en) 1930-09-05 1931-09-01 Improvements in or relating to thermionic valve amplifiers

Country Status (1)

Country Link
GB (1) GB388766A (en)

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