GB657768A - Amplitude modulator - Google Patents

Amplitude modulator

Info

Publication number
GB657768A
GB657768A GB15457/48A GB1545748A GB657768A GB 657768 A GB657768 A GB 657768A GB 15457/48 A GB15457/48 A GB 15457/48A GB 1545748 A GB1545748 A GB 1545748A GB 657768 A GB657768 A GB 657768A
Authority
GB
United Kingdom
Prior art keywords
carrier
valve
valves
wave
peaks
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
GB15457/48A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB657768A publication Critical patent/GB657768A/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
    • H03C1/26—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to cathode

Landscapes

  • Amplitude Modulation (AREA)
  • Amplifiers (AREA)

Abstract

657,768. Valve modulating circuits. RADIO CORPORATION OF AMERICA. June 8, 1948, No. 15457. Convention date, July 9, 1947. [Class 40 (v)] A linear high percentage amplitude modulation system comprises a carrier amplifier valve V2 and modulator valve V1 with common cathode resistor R4, modulation and carrier being applied to the respective control grids of the valves, the carrier through a half-wave rectifier D1 so that only the negative peaks of the carrier are applied to the grid of V2. The latter valve is driven to cut-off by the negative carrier peaks so that at the anode of V2 the carrier amplitude varies between B+, the H.T. voltage, and a lower value modulated by the valve V1. The D.C. component of this wave is then removed by a band-pass filter 30 so that an output wave modulated in both half-cycles is obtained. Cathode resistors R2, R3 individual to the valves V1, V2 provide current feed-back stabilization.
GB15457/48A 1947-07-09 1948-06-08 Amplitude modulator Expired GB657768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US759891A US2469747A (en) 1947-07-09 1947-07-09 Amplitude modulator

Publications (1)

Publication Number Publication Date
GB657768A true GB657768A (en) 1951-09-26

Family

ID=25057347

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15457/48A Expired GB657768A (en) 1947-07-09 1948-06-08 Amplitude modulator

Country Status (2)

Country Link
US (1) US2469747A (en)
GB (1) GB657768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001348B (en) * 1955-08-08 1957-01-24 Rohde & Schwarz Linear modulator for electrical oscillations

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537760A (en) * 1945-07-20 1951-01-09 Cornell Dubilier Electric Amplifier wave inverter
US2901599A (en) * 1954-07-16 1959-08-25 Rca Corp Amplitude-modulated radio transmitter combining two constant amplitude phase modulated signals
NL193037A (en) * 1954-12-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001348B (en) * 1955-08-08 1957-01-24 Rohde & Schwarz Linear modulator for electrical oscillations

Also Published As

Publication number Publication date
US2469747A (en) 1949-05-10

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