Variable frequency oscillator

Details Variable frequency oscillator Variable frequency oscillator

1976-10-29

1977-10-25

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331 25, 331 34, 331177R, H03B 304, H03B 512

Patent

active

040558177

ABSTRACT:
A variable frequency oscillator comprises an oscillating loop and a variable phase shifter for imparting one of two different phase shifts depending upon the polarities of a DC control voltage to a signal from the oscillating loop. The phase-shifted signal has its amplitude controlled by the amplitude of the control voltage and is combined with the signal in the oscillating loop. The vector sum of the combined signals determines the phase angle of the oscillator signal and hence the frequency thereof.

REFERENCES:
patent: 3691475 (1972-09-01), Mouri et al.
patent: 3763439 (1973-10-01), Peil
patent: 3806634 (1974-04-01), Abbott et al.
patent: 3973221 (1976-08-01), Jett, Jr.

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