Voltage controlled oscillator circuit

Details Voltage controlled oscillator circuit Voltage controlled oscillator circuit

1998-08-11

2000-01-04

Mis, David

Oscillators

Ring oscillators

331 2, 331 17, 331 34, 331177R, 331186, H03B 524, H03L 706

Patent

active

060114444

ABSTRACT:
An object is to keep the oscillation gain nearly constant and attain an oscillation frequency with high stability and low jitter. A voltage controlled oscillator circuit (VCO) is constructed by a VCO control circuit and a ring oscillator. The VCO control circuit has two input terminals (n input, w input). The VC control circuit multiplies the n input by the w input, and outputs a control signal (PMOS n input, NMOS n input) obtained by adding the result of multiplication to the n input. The ring oscillator is constructed by delay circuits of an odd number of stages serially connected.

REFERENCES:
patent: 5847616 (1998-12-01), Ng et al.

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