Voltage controlled RC oscillator circuit

Details Voltage controlled RC oscillator circuit Voltage controlled RC oscillator circuit

1984-10-11

1986-05-20

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Transistors

331143, 331177R, H03K 3023, H03K 303

Patent

active

045904448

ABSTRACT:
A voltage controlled oscillator circuit is disclosed. A CMOS circuit version is detailed. A relaxation oscillator has its input coupled by way of a voltage follower buffer to the input terminal where the control voltage is applied. The operating frequency is determined by the circuit resistor and capacitor values along with the control potential. A linear frequency versus voltage response is obtained and the circuit will operate at low supply voltages.

REFERENCES:
patent: 3801866 (1974-04-01), Schmidgall
Cohn et al., "Square Wave Oscillator", Electronics Australia, vol. 41, No. 5, Aug. 1979, pp. 72, 73, 75, 76.
Tenny, "Linear VCO Made from a 555 Timer", Electronic Design, Oct. 11, 1975, p. 96.

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