Wide range/high speed low power CMOS VCO

Details Wide range/high speed low power CMOS VCO Wide range/high speed low power CMOS VCO

2011-01-04

2011-01-04

Pascal, Robert (Department: 2817)

Oscillators

Ring oscillators

C331S17700V

Reexamination Certificate

active

07863991

ABSTRACT:
A VCO circuit having low jitter and low PSS (power supply sensitivity). The VCO circuit includes a first ring oscillator stage, a second ring oscillator stage coupled to the first ring oscillator stage, and a VCO input coupled to both the first ring oscillator stage and the second ring oscillator stage for receiving a control voltage. Each of the first ring oscillator stage and the second ring oscillator stage further includes a CMOS inverter with a plurality of cross coupled transistors to implement oscillation of the VCO circuit.

REFERENCES:
patent: 5559476 (1996-09-01), Zhang et al.
patent: 6469585 (2002-10-01), Dai et al.
patent: 2007/0200636 (2007-08-01), Cheruiyot et al.

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