Phase lock loop and the control method thereof

Details Phase lock loop and the control method thereof Phase lock loop and the control method thereof

2007-10-30

2007-10-30

Lee, Benny (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S011000, C331S014000, C331S179000

Reexamination Certificate

active

11068622

ABSTRACT:
A phase lock loop and the control method thereof. The phase lock loop adjusts operating states automatically to generate a feedback clock for tracing a reference clock. The control method generates the first and second clocks corresponding to the highest and lowest frequency oscillating clocks respectively generated by the phase lock loop when operating in one of select states. The frequencies of the first and second clocks are compared to the frequency of the reference clock respectively, thereby holding the select state of the phase lock loop when the first, second, and reference clocks are in a first predetermined condition or changing the select state of the phase lock loop when in a second predetermined condition.

REFERENCES:
patent: 4682116 (1987-07-01), Wolaver et al.
patent: 6259327 (2001-07-01), Balistreri et al.
patent: 6747519 (2004-06-01), Jaehne et al.
patent: 6888413 (2005-05-01), Adams et al.
patent: 566003 (2003-12-01), None
Taiwan Office Action mailed Sep. 20, 2006.
China Office Action mailed Sep. 1, 2006.

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