Methods and apparatus for compensating a variable oscillator...

Details Methods and apparatus for compensating a variable oscillator... Methods and apparatus for compensating a variable oscillator...

2008-04-08

2008-04-08

Pascal, Robert J. (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

C331S010000, C331S016000, C331S047000, C331S176000

Reexamination Certificate

active

11356751

ABSTRACT:
Circuits and methods for compensating a variable oscillator for process and/or operational variations. The circuit generally comprises (a) a replica oscillator, (b) a counter configured to count pulses of the replica oscillator and to produce a count signal, and (c) a compensation circuit configured to provide an adjustment signal to the variable oscillator in accordance with the count signal. The method generally comprises the steps of (a) counting the number of pulses of a replica oscillator signal, and (b) providing an adjustment signal to the variable oscillator in accordance with the number of pulses counted. The present invention advantageously provides a largely digital method to compensate a variable oscillator for process, voltage, and temperature variations.

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