GB526720A - Improvements in or relating to high frequency transmitters - Google Patents

Improvements in or relating to high frequency transmitters

Info

Publication number
GB526720A
GB526720A GB9416/39A GB941639A GB526720A GB 526720 A GB526720 A GB 526720A GB 9416/39 A GB9416/39 A GB 9416/39A GB 941639 A GB941639 A GB 941639A GB 526720 A GB526720 A GB 526720A
Authority
GB
United Kingdom
Prior art keywords
modulation
distortion
carrier
valve
circuit
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
GB9416/39A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB526720A publication Critical patent/GB526720A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Amplifiers (AREA)
  • Transmitters (AREA)

Abstract

526,720. Wireless transmitting systems. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. March 25, 1939, No. 9416. Convention date, March 26, 1938. [Class 40 (v)i] In a high-frequency transmitter in which distortion is reduced by feed-back of the lowfrequency component obtained by rectification of the modulated output, non-rectilinear action of the rectifier at high degrees of modulation is prevented by reducing the depth of modulation by the addition of carrier in the rectifier circuit. The transmitting valve R is supplied with carrier from T and modulation from M. A modulated high-frequency component is obtained in the coupling coil CC from the output circuit OC, and is rectified at G to' obtain a modulation voltage which is combined with the original modulating voltage in a bridge B. The difference voltage occurring across arm Z, which corresponds to the distortion in valve R, is then applied to the grid circuit of the valve in a sense to compensate for distortion. Carrier-frequency oscillations are superimposed by means of a coil CK in the rectifier circuit, and are obtained from T via a phase-adjusting arrangement P.
GB9416/39A 1938-03-26 1939-03-25 Improvements in or relating to high frequency transmitters Expired GB526720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE526720X 1938-03-26

Publications (1)

Publication Number Publication Date
GB526720A true GB526720A (en) 1940-09-24

Family

ID=6553071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9416/39A Expired GB526720A (en) 1938-03-26 1939-03-25 Improvements in or relating to high frequency transmitters

Country Status (2)

Country Link
US (1) US2250571A (en)
GB (1) GB526720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135556A (en) * 1983-02-23 1984-08-30 Mcmichael Ltd Radio transmitter arrangements

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983874A (en) * 1946-03-23 1961-05-09 Schlumberger Well Surv Corp Phase responsive alternating current networks
US2894122A (en) * 1954-10-20 1959-07-07 Marconi Wireless Telegraph Co Transceiver with automatic bias control of modulator
US2932691A (en) * 1955-06-14 1960-04-12 Time Inc Circuit for altering intelligence to carrier signal ratio
US3100286A (en) * 1961-10-18 1963-08-06 Gen Precision Inc Bridge feedback modulator
JPS5145932B1 (en) * 1969-11-19 1976-12-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135556A (en) * 1983-02-23 1984-08-30 Mcmichael Ltd Radio transmitter arrangements

Also Published As

Publication number Publication date
US2250571A (en) 1941-07-29

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