Voltage controlled oscillator with dual loop resonant tank circu

Details Voltage controlled oscillator with dual loop resonant tank circu Voltage controlled oscillator with dual loop resonant tank circu

1986-12-10

1987-11-10

LaRoche, Eugene R.

Oscillators

Solid state active element oscillator

Transistors

331167, H03B 500

Patent

active

047060450

ABSTRACT:
A voltage controlled oscillator (VCO) has an LC tank circuit which is pumped by two out-of-phase feedback components. The combined effect of the two out-of-phase feedback components results in an effective feedback signal that is a function of the ratio of the magnitude of the two out-of-phase coponents. The magnitude of one of these feedback components is controlled by a CMOS subthreshold Gilbert multiplier. The frequency of oscillation of an oscillating signal within the LC tank circuit changes according to a control voltage applied to the Gilbert multiplier.

REFERENCES:
patent: 3806828 (1974-04-01), Johnson
patent: 4310807 (1982-01-01), McKee

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