GB454259A - Improvements in or relating to modulated carrier wave transmitters - Google Patents

Improvements in or relating to modulated carrier wave transmitters

Info

Publication number
GB454259A
GB454259A GB9575/35A GB957535A GB454259A GB 454259 A GB454259 A GB 454259A GB 9575/35 A GB9575/35 A GB 9575/35A GB 957535 A GB957535 A GB 957535A GB 454259 A GB454259 A GB 454259A
Authority
GB
United Kingdom
Prior art keywords
valve
valves
modulating
output
current
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
GB9575/35A
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
Priority to GB9575/35A priority Critical patent/GB454259A/en
Priority to DEM134008D priority patent/DE658707C/en
Priority to US70751A priority patent/US2120800A/en
Publication of GB454259A publication Critical patent/GB454259A/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
    • H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
    • H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode

Landscapes

  • Microwave Amplifiers (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

454,259. Valve modulating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and DITCHAM, W. T., Tudor House, Broomfield Road, Chelmsford. March 27, 1935, No. 9575. [Class 40 (v)] The output of a carrier-wave generator or amplifier V1 is modulated by two valves V2, V3 which are excited in opposite phase by the modulating voltage and are connected respectively in shunt and in series with the valve V1. Both valves V2, V3 are biassed back to zero plate current, and they pass current alternately during the respective half-cycles of the modulating voltage applied to their grids by the transformers T1, T2. When the valve V2 is conductive the carrierwave output of the amplifier V1 is reduced by virtue of the iron-cored choke L in the plate supply circuit both of valve V1, and of valve V2, and connected between a D.C. source El and the cathodes. When the valve V3 is conductive, the second source E2 contributes to the plate current of the valve V1 and the carrier output rises. No current passes in the valves V2 V3 in the absence of modulating signals. Several valves in parallel may replace any of the valves V1, V2, V3.
GB9575/35A 1935-03-27 1935-03-27 Improvements in or relating to modulated carrier wave transmitters Expired GB454259A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9575/35A GB454259A (en) 1935-03-27 1935-03-27 Improvements in or relating to modulated carrier wave transmitters
DEM134008D DE658707C (en) 1935-03-27 1936-03-25 Circuit arrangement for the anode voltage modulation of a high-frequency transmitter tube
US70751A US2120800A (en) 1935-03-27 1936-03-25 Transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9575/35A GB454259A (en) 1935-03-27 1935-03-27 Improvements in or relating to modulated carrier wave transmitters

Publications (1)

Publication Number Publication Date
GB454259A true GB454259A (en) 1936-09-28

Family

ID=9874629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9575/35A Expired GB454259A (en) 1935-03-27 1935-03-27 Improvements in or relating to modulated carrier wave transmitters

Country Status (3)

Country Link
US (1) US2120800A (en)
DE (1) DE658707C (en)
GB (1) GB454259A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2854635A (en) * 1956-06-21 1958-09-30 Gen Precision Lab Inc Video modulator
US2966636A (en) * 1959-05-13 1960-12-27 Crosley Broadcasting Corp Modulation system
US3050697A (en) * 1960-04-15 1962-08-21 Crosiey Broadcasting Corp A.m. bridge modulator

Also Published As

Publication number Publication date
US2120800A (en) 1938-06-14
DE658707C (en) 1938-04-09

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