Phase locked circuit

Details Phase locked circuit Phase locked circuit

2006-08-08

2009-06-02

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S159000

Reexamination Certificate

active

07541849

ABSTRACT:
A phase locked circuit includes a locked loop circuit having a phase comparator, a voltage controlled oscillator, and a variable frequency divider which divides a clock signal fvcooutput from the voltage controlled oscillator by n and outputs it. Additionally, the phase locked circuit includes a band pass filter part which is coupled to an output side of the voltage controlled oscillator via a switching part. A frequency division ratio setting signal to be input into the variable frequency divider is input as a switching signal into the switching part so as to switch a frequency of the clock signal fvcooutput from the voltage controlled oscillator. As synchronizing with switching of the frequency, the switching part switches a plurality of band pass filters provided to the band pass filter part and couples to the voltage controlled oscillator.

REFERENCES:
patent: 5495202 (1996-02-01), Hsu
patent: 5568098 (1996-10-01), Horie et al.
patent: 5781600 (1998-07-01), Reeve et al.
patent: 5815900 (1998-10-01), Ichikawa et al.
patent: 5973570 (1999-10-01), Salvi et al.
patent: 6441692 (2002-08-01), Nakatani et al.
patent: 05-075377 (1993-03-01), None
patent: H09-237133 (1997-09-01), None
patent: 2002-305446 (2002-10-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4076212