Oscillator mixer circuit with reaction-tree coupling

Details Oscillator mixer circuit with reaction-tree coupling Oscillator mixer circuit with reaction-tree coupling

1985-06-06

1987-01-06

Laroche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 21, 331 74, H03C 300

Patent

active

046350039

ABSTRACT:
An oscillator and mixer circuit of an integrated UHF/VHF modulator circuit includes a single active oscillator circuit to be connected to frequency-determining passive circuits for UHF and multichannel VHF operation, a single mixer part mixing an oscillator signal from the active oscillator circuit with a useful signal, and a reaction-free coupling connected between the single active oscillator circuit and the single mixer part.

REFERENCES:
patent: 3688214 (1972-08-01), Goldie
patent: 4052682 (1977-10-01), Wilcox
patent: 4536721 (1985-08-01), Charbonnier
Electronics International, vol. 54, Dec. 1981, pp. 76-78, Scott, B. et al., "Linear One-Chip Modulator Eases TV Circuit Design".
Elektror, vol. 9, Feb. 1983, No. 2, pp. 227-231, "VAM--Video/Audio Modulator".
National Semiconductor IC specification "LM2889 TV Video Modulator", Apr. '83.

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