GB537558A - Linear thermionic amplifying systems - Google Patents

Linear thermionic amplifying systems

Info

Publication number
GB537558A
GB537558A GB3871/40A GB387140A GB537558A GB 537558 A GB537558 A GB 537558A GB 3871/40 A GB3871/40 A GB 3871/40A GB 387140 A GB387140 A GB 387140A GB 537558 A GB537558 A GB 537558A
Authority
GB
United Kingdom
Prior art keywords
amplifier
transformer
coupled
rectifier
fed back
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
GB3871/40A
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 GB537558A publication Critical patent/GB537558A/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
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H03F1/04—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers
    • H03F1/06—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in discharge-tube amplifiers to raise the efficiency of amplifying modulated radio frequency waves; to raise the efficiency of amplifiers acting also as modulators
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/02—Details
    • H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Abstract

537,558. Valve amplifying circuits. STANDARD TELEPHONES & CABLES, Ltd. March 1, 1940, No. 3871. Convention date, May 13, 1939. [Class 40 (v)] Relates to thermionic amplifiers of modulated waves in which portions of the wave before and after passing through the amplifier are detected and the difference of the waves derived from the two rectifiers is fed back to the amplifier so as to correct irregular amplification and ensure overall linear amplification of the modulation. According to the invention, the difference wave is fed back by a transformer. The feed-back may be into the grid or anode circuit of the amplifier. As shown in Fig. 2, the input of the amplifier T 1 is coupled by a coil L 2 to a rectifier T 2 , and the output is similarly connected by another coil L 3 to another rectifier T 3 . Each rectifier has a load impedance R 2 , C 2 , R 3 , C 3 ; and these are coupled by condensers C 4 , C 4 to primary L 4 of a transformer, the secondary L 5 of which is coupled to a condenser C 5 in the input circuit of the amplifier T 1 . In modifications, amplifiers are inserted between the detectors and the transformer and between the transformer and the main amplifier.
GB3871/40A 1939-05-13 1940-03-01 Linear thermionic amplifying systems Expired GB537558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US273404A US2252049A (en) 1939-05-13 1939-05-13 Linear amplifying system

Publications (1)

Publication Number Publication Date
GB537558A true GB537558A (en) 1941-06-26

Family

ID=23043798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3871/40A Expired GB537558A (en) 1939-05-13 1940-03-01 Linear thermionic amplifying systems

Country Status (5)

Country Link
US (1) US2252049A (en)
BE (1) BE474454A (en)
ES (1) ES176812A1 (en)
FR (1) FR865592A (en)
GB (1) GB537558A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525052A (en) * 1968-05-13 1970-08-18 Farnsworth D Clark Distortion cancelling circuit for amplifiers

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE474143A (en) * 1946-06-27
US2807665A (en) * 1952-08-09 1957-09-24 Perlman Robert Ruben Reduction of distortion in amplifying systems
DE950788C (en) * 1954-01-09 1956-10-18 Telefunken Gmbh Transmitter circuit for the amplitude modulation of a high frequency oscillation with a reduced bandwidth
BE568224A (en) * 1957-06-07
FR1275031A (en) * 1960-09-22 1961-11-03 Electronique & Physique Improvements to methods for linearizing the amplitude characteristic of power amplifiers
US3335370A (en) * 1965-03-31 1967-08-08 Trw Semiconductors Inc High level amplitude modulation of transistor radio frequency amplifiers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525052A (en) * 1968-05-13 1970-08-18 Farnsworth D Clark Distortion cancelling circuit for amplifiers

Also Published As

Publication number Publication date
ES176812A1 (en) 1947-03-16
BE474454A (en)
US2252049A (en) 1941-08-12
FR865592A (en) 1941-05-27

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