GB496845A - Improvements in or relating to modulated carrier wave transmitters - Google Patents

Improvements in or relating to modulated carrier wave transmitters

Info

Publication number
GB496845A
GB496845A GB3567637A GB3567637A GB496845A GB 496845 A GB496845 A GB 496845A GB 3567637 A GB3567637 A GB 3567637A GB 3567637 A GB3567637 A GB 3567637A GB 496845 A GB496845 A GB 496845A
Authority
GB
United Kingdom
Prior art keywords
terminals
potential
modulation
grid
fct
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
GB3567637A
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.)
LESLIE TYRRELL MOODEY
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
LESLIE TYRRELL MOODEY
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 LESLIE TYRRELL MOODEY, Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical LESLIE TYRRELL MOODEY
Priority to GB3567637A priority Critical patent/GB496845A/en
Publication of GB496845A publication Critical patent/GB496845A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/62—Modulators in which amplitude of carrier component in output is dependent upon strength of modulating signal, e.g. no carrier output when no modulating signal is present

Landscapes

  • Amplitude Modulation (AREA)
  • Toys (AREA)

Abstract

496,845. Modulating systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., MOODEY, L. T., and STAINES, C. R. Dec. 23, 1937, No. 35676. [Class 40 (v)] A modulation system of the floating carrier type employs a valve V having at least three grids, one of which, G2, acts as a screen. Carrier frequency from terminals CT is applied to grid G1, and grid G3 on the other side of the screen is connected to the cathode through resistance R3 a bias source B2, both shunted by condensers C2, C3, and condenser C5. Modulation potentials are applied at terminals MT across the series circuit formed by R3 and B2 and a unidirectional potential, obtained in any convenient manner, varying in dependence upon the modulating potential level is applied from terminals FCT across condenser C5. Output is taken from the carrier frequency tuned circuit C1, L1. In a modification, Fig. 2 (not shown) the control potential only is applied to grid G3 and the modulation is applied in the anode circuit. The floating carrier control potential may be obtained from the modulation potentials after amplification by means of a full-wave rectifier, Fig. 3 (not shown), the resultant potential being amplified in a D.C. amplifier whose anode resistance is connected across the terminals FCT.
GB3567637A 1937-12-23 1937-12-23 Improvements in or relating to modulated carrier wave transmitters Expired GB496845A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3567637A GB496845A (en) 1937-12-23 1937-12-23 Improvements in or relating to modulated carrier wave transmitters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3567637A GB496845A (en) 1937-12-23 1937-12-23 Improvements in or relating to modulated carrier wave transmitters

Publications (1)

Publication Number Publication Date
GB496845A true GB496845A (en) 1938-12-07

Family

ID=10380338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3567637A Expired GB496845A (en) 1937-12-23 1937-12-23 Improvements in or relating to modulated carrier wave transmitters

Country Status (1)

Country Link
GB (1) GB496845A (en)

Similar Documents

Publication Publication Date Title
US3258694A (en) Multi-channel p.m. transmitter with automatic modulation index control
GB548443A (en) Improvements in television and like transmission
GB539793A (en) Improvements in or relating to fading compensation in radio receivers
US2243141A (en) Radio receiver circuits
GB496845A (en) Improvements in or relating to modulated carrier wave transmitters
GB814632A (en) Improvements in or relating to amplitude modulated carrier wave transmitters
GB677506A (en) Improvements in pulse amplifiers
GB537558A (en) Linear thermionic amplifying systems
US2267703A (en) Modulation
GB468756A (en) Improvements in or relating to modulated carrier-wave transmitters
GB413647A (en) Improvements in or relating to carrier wave transmission systems
GB388213A (en) Improvements in or relating to modulated carrier wave signal transmitting and receiving systems
US2263645A (en) Frequency sensitive system
GB636375A (en) Improvements in or relating to circuits for receiving frequency-modulated oscillations
GB262076A (en) Improvements in or relating to modulation systems applicable to wireless signalling
US2034511A (en) Diode rectifier circuit
GB453501A (en) Improvements in or relating to modulated carrier wave transmitters
US1910099A (en) Carrier wave receiver
GB515106A (en) Improvements in or relating to modulator carrier wave transmitters
GB559218A (en) Carrier-signal limiting system
GB596531A (en) Improvements in amplifying circuits for angle modulated waves
GB465613A (en) Improvements in or relating to thermionic valve circuit arrangements
US2161851A (en) Carrier wave modulator arrangement
GB427026A (en) Improvements in or relating to modulating carrier wave transmitters
GB467996A (en) Improvements in or relating to carrier wave modulator arrangements