Radio frequency pulse width amplitude modulation system

Details Radio frequency pulse width amplitude modulation system Radio frequency pulse width amplitude modulation system

1977-02-10

1977-12-13

Kominski, John

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 1, 332 10, 332 17, 332 9R, 332 40, H03C 100

Patent

active

040631990

ABSTRACT:
Amplitude modulation of a radio frequency carrier is achieved by generating a rectangular wave pulse train at the carrier frequency, the pulses of which vary in width as a function of the amplitude of the audio input signal. The audio frequency input wave is subjected to an arc sine conversion process prior to the generation of the rectangular wave pulse train. The radio frequency pulse width modulated wave is amplified and then filtered to pass the fundamental radio frequency voltage and its modulation side bands.

REFERENCES:
patent: 3363199 (1968-01-01), Besslich
patent: 3506920 (1970-04-01), Swanson

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