Phase locked loop

Details Phase locked loop Phase locked loop

2008-07-01

2008-07-01

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S034000, C331S17700V

Reexamination Certificate

active

10540961

ABSTRACT:
A phase locked loop circuit, for providing an oscillating output signal at an output frequency, including: a reference counter; a loop counter; a phase detector having a first input coupled to the reference counter and a second input coupled to the loop counter; a voltage controlled oscillator having an input coupled to the output of the phase detector and an output for providing the oscillating output signal; a feedback loop coupling the output of the voltage controlled oscillator to the input of the loop counter; and delay circuitry, including a feedback loop, arranged to introduce a discrete delay into the output of the loop counter and/or the reference counter.

REFERENCES:
patent: 6121811 (2000-09-01), Scott et al.
patent: 6356122 (2002-03-01), Sevalia et al.
patent: 09-062222 (1997-03-01), None

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