Radio frequency oscillator-modulator circuit

Details Radio frequency oscillator-modulator circuit Radio frequency oscillator-modulator circuit

1980-01-24

1982-06-29

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

331117R, 332 43B, 455108, H03B 512, H03C 144

Patent

active

043374441

ABSTRACT:
A radio frequency oscillator-modulator for use in a video game includes an oscillator circuit, formed from a first differentially connected, emitter-coupled transistor pair having base/collector cross-coupling, that is dc coupled to the differential inputs of a second differentially connected, emitter-coupled transistor pair that forms the modulator circuit. The modulation signal is applied through a resistance to the connected emitters of the modulator circuit to vary the drive current thereof. The radio frequency oscillator-modulator includes bias circuitry that establishes a low level of operation that provides for great linearity and low R.F. radiation.

REFERENCES:
patent: 3665342 (1972-05-01), Reed
patent: 3866148 (1975-02-01), Lisle, Jr. et al.
patent: 3963996 (1976-06-01), Skerlos
patent: 3986145 (1976-10-01), Hongu et al.
patent: 4063193 (1977-12-01), Wilcox

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