Method of reducing interference components in a frequency modula

Details Method of reducing interference components in a frequency modula Method of reducing interference components in a frequency modula

1978-07-10

1980-09-16

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

375 22, 332 15, 332 18, 455 44, 455 63, H03C 308, H04B 112, H04B 1500

Patent

active

042232821

ABSTRACT:
A method of reducing interference components in a frequency-modulated carrier signal in which the modulating signal contains a composite color television signal with a chrominance signal modulated on a chrominance subcarrier wave. In addition to the frequency modulation, the carrier signal is pulse-width modulated by the first-order lower side-band component of the frequency-modulated signal produced by the modulated chrominance subcarrier signal.

REFERENCES:
patent: 3132339 (1964-05-01), Boughnou
patent: 3893163 (1975-07-01), Wessels et al.

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