Varactor-based ring oscillator

Details Varactor-based ring oscillator Varactor-based ring oscillator

2006-06-06

2006-06-06

Mis, David (Department: 2817)

Oscillators

Ring oscillators

C331S17700V

Reexamination Certificate

active

07057466

ABSTRACT:
A varactor-based ring oscillator to produce an output signal and method therefore are disclosed. The ring oscillator includes a first phase shift circuit having a first pole. The ring oscillator also includes a second phase shift circuit having a second pole and a third phase shift circuit having a third pole. The output of the third phase shift circuit is cross-coupled to the input of the first phase shift circuit. A phase shift circuit of the ring oscillator includes a pole that has a varactor and generates phase shift for the phase shift circuit. The varactor can be adjusted or varied to tune, the phase shift, the phase shift circuit and the frequency of the oscillator. If the varactor is in the final phase shift circuit of the oscillator, the varactor is coupled to a diode that supplies voltage to the varactor. A voltage control signal is applied to the pole, and to the oscillator, to generate the output signal having a specified frequency.

REFERENCES:
patent: 2971165 (1961-02-01), Linn
patent: 3416100 (1968-12-01), Kruse, Jr. et al.
patent: 3813614 (1974-05-01), Darrow et al.
patent: 5012142 (1991-04-01), Sonntag
patent: 5185581 (1993-02-01), Brown
patent: 5191301 (1993-03-01), Mullgrav, Jr.
patent: 5610560 (1997-03-01), Sauer et al.
patent: 5955929 (1999-09-01), Moon et al.
patent: 6842078 (2005-01-01), Manna et al.
Miller, C.A., et al., “The Distributed RC Variable-Frequency Phase-Shift Oscillator”, vol. 17, No. 4, pp. 457-460, 1978, Pergamon Press Ltd., Great Britain.

Affiliated with

Also associated with

Rating

Varactor-based ring oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Varactor-based ring oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Varactor-based ring oscillator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3658413