GB475621A - Improvements in or relating to thermionic modulator circuit arrangements - Google Patents

Improvements in or relating to thermionic modulator circuit arrangements

Info

Publication number
GB475621A
GB475621A GB6948/37A GB694837A GB475621A GB 475621 A GB475621 A GB 475621A GB 6948/37 A GB6948/37 A GB 6948/37A GB 694837 A GB694837 A GB 694837A GB 475621 A GB475621 A GB 475621A
Authority
GB
United Kingdom
Prior art keywords
modulation
choke
valve
anode
source
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
GB6948/37A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB475621A publication Critical patent/GB475621A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes

Landscapes

  • Amplifiers (AREA)
  • Transmitters (AREA)
  • Amplitude Modulation (AREA)

Abstract

475,621. Valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. March 9, 1937, No. 6948. Convention date, March 9, 1936. [Class 40 (v)] The efficiency of a loss modulator is improved by maintaining the D.C. anode current of the power valve substantially constant by a lowfrequency choke. A power amplifier valve 1 has its input connected to a carrier frequency source 2 and the anode 4 connected by condenser 8 to the tank circuit 9, 10. Anode current is supplied from a source 7 through an H.F. choke 5 and a modulation frequency choke 6. The loss introducing valve 12 has its anode-cathode space connected across the tank circuit and modulation from source 19 supplied to its grid 16. The effect of the choke 6 in preventing changes of anode current at modulation frequency is to provide an increased degree of modulation for a given variation in loss by absorbing power during the modulation troughs.
GB6948/37A 1936-03-09 1937-03-09 Improvements in or relating to thermionic modulator circuit arrangements Expired GB475621A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67866A US2152753A (en) 1936-03-09 1936-03-09 Modulator

Publications (1)

Publication Number Publication Date
GB475621A true GB475621A (en) 1937-11-23

Family

ID=22078939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6948/37A Expired GB475621A (en) 1936-03-09 1937-03-09 Improvements in or relating to thermionic modulator circuit arrangements

Country Status (2)

Country Link
US (1) US2152753A (en)
GB (1) GB475621A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2507721A (en) * 1948-12-21 1950-05-16 Rca Corp Amplitude modulation

Also Published As

Publication number Publication date
US2152753A (en) 1939-04-04

Similar Documents

Publication Publication Date Title
GB475621A (en) Improvements in or relating to thermionic modulator circuit arrangements
GB490990A (en) Arrangements for modulating high frequency oscillations
GB564504A (en) Improvements in and relating to electron discharge circuits
GB489849A (en) Improvements in and relating to thermionic valve oscillators and amplifiers
GB413973A (en) Improvements in or relating to short wave thermionic valve transmitter arrangements
GB424470A (en) Improvements in or relating to modulating and keying systems for radio and like transmitters
GB532006A (en) Improvements in or relating to modulation systems
GB547837A (en) Improvements relating to frequency modulation
GB435561A (en) Radio transmission arrangement, more particularly for short or ultra-short wave purposes
GB471128A (en) Improvements in or relating to modulated carrier wave transmitters
GB411638A (en) Improvements in or relating to modulated carrier wave transmitters
GB504196A (en) Improvements in and relating to thermionic valve apparatus
GB497343A (en) Improvements in or relating to modulated carrier wave transmitters
GB546168A (en) Improvements in frequency stabilising circuits for frequency modulation systems
GB467066A (en) Improvements in or relating to phase modulating circuit arrangements
GB506109A (en) Improvements in or relating to carrier wave modulating circuit arrangements
GB556852A (en) A improved frequency-modulated oscillation generator
GB522882A (en) Improvements in or relating to magnetron oscillator circuits
GB528632A (en) Improvements in or relating to thermionic valve amplifiers
GB526418A (en) Improvements in or relating to modulator arrangements
GB453501A (en) Improvements in or relating to modulated carrier wave transmitters
GB551764A (en) Improvements relating to frequency or phase modulation
GB464301A (en) Improvements relating to the supply of current to thermionic valve amplifiers
GB513449A (en) Improvements in or relating to frequency control systems in high frequency electric circuits
GB194328A (en) Improvements in and relating to transmitting signalling systems employing thermionic valves and the like