Frequency modulator

Details Frequency modulator Frequency modulator

1974-11-18

1976-03-16

Kominski, John

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

331111, H03K 906

Patent

active

039449491

ABSTRACT:
A frequency modulator includes a capacitor, a controlled current source, and a bistable circuit. The current source and bistable circuit operate to alternately vary the charge in opposite directions on the capacitor. The frequency of opposite charge variation is controlled by the amplitude of the input signal applied to the current source. A control circuit coupled to the capacitor and the bistable circuit varies the frequency of opposite charge variation to provide a linear frequency versus input signal amplitude.

REFERENCES:
patent: 3290617 (1966-12-01), Bellem
patent: 3328724 (1967-06-01), Way
patent: 3371291 (1968-02-01), Forrest
patent: 3528036 (1970-09-01), Belkson
patent: 3581239 (1971-05-01), Knutson
patent: 3794934 (1974-02-01), Rhee
patent: 3842371 (1974-10-01), Kelley

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