Low noise charge pump for PLL-based frequence synthesis

Details Low noise charge pump for PLL-based frequence synthesis Low noise charge pump for PLL-based frequence synthesis

2006-12-19

2006-12-19

Pascal, Robert (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331SDIG002, C331S016000, C327S157000

Reexamination Certificate

active

07151413

ABSTRACT:
A low noise charge pump for use in a PLL-based frequency synthesizer. The charge pump includes a timing controller and a plurality of charge-pump circuits. The timing controller receives a reference signal to generate a plurality of enable signals having non-overlapping phases, where the frequency of each enable signal is equal to that of the reference signal divided by the number of the enable signals. The charge-pump circuits are coupled in parallel and operate in a time-interleaved manner according to the enable signals. In response to a first and second control signal, the charge-pump circuits are able to generate respective output currents which are multiplexed together to form a charge-pump current.

REFERENCES:
patent: 6130561 (2000-10-01), Dufour
patent: 6429901 (2002-08-01), Kiyose et al.
patent: 6897690 (2005-05-01), Keaveney et al.
patent: 6940356 (2005-09-01), McDonald et al.

Affiliated with

Also associated with

Rating

Low noise charge pump for PLL-based frequence synthesis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low noise charge pump for PLL-based frequence synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low noise charge pump for PLL-based frequence synthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3715994