PLL circuit

Details PLL circuit PLL circuit

2006-10-24

2006-10-24

Kinkead, Arnold (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S002000, C331S010000, C331S016000, C331S00100A, C331S046000, C327S156000, C345S213000, C375S376000

Reexamination Certificate

active

07126430

ABSTRACT:
The frequency of a first voltage controlled oscillator is stabilized in a first PLL circuit part into which a reference frequency signal is inputted. In addition, a second PLL circuit part is formed by inputting a control voltage which is the same as the frequency control voltage of the first voltage controlled oscillator into a second voltage controlled oscillator having the same configuration as the first voltage controlled oscillator. The first PLL circuit part is provided with first and second variable frequency dividers which respectively divide the reference frequency signal and the output of the first voltage controlled oscillator. In response to an input signal into the second PLL circuit part, the free-running frequencies of the second and first voltage controlled oscillators are switched, and at the same time, the division ratio of first and second variable frequency dividers are switched.

REFERENCES:
patent: 5657359 (1997-08-01), Sakae et al.
patent: 6512801 (2003-01-01), Ninomiya
patent: 266084 (1990-05-01), None
patent: 05327490 (1993-12-01), None
patent: 08186490 (1996-07-01), None
patent: 10256899 (1998-09-01), None
Japanese Office Action dated May 18, 2006 with English translation.

Affiliated with

Also associated with

Rating

PLL circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3686399