Frequency generating device and method thereof

Oscillators – Electromechanical resonator – Crystal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C331S00100A, C331S17700V, C331S016000

Reexamination Certificate

active

06794949

ABSTRACT:

BACKGROUND
With scaling of technology, the reduction of power and leakage current to extend battery life by utilizing specialized design techniques has become more desirable. One such specialized technique is to reduce the frequency of a clock signal and/or to adjust the supply voltage to reduce power consumption of digital circuitry while maintaining adequate performance of the device.
In digital circuits, power consumption typically varies linearly with the frequency of operation. Various methods of stopping system clocks, or lowering the operating frequency of system clocks, have been used. One such technique to reduce the operating frequency of a system clock is to change the multiplication/divide ratio of a phase locked-loop. By changing the multiplication ratio of a phase locked-loop, the output frequency of the phase locked-loop is varied. However, changing the multiplication ratio of a phase locked-loop is not a very robust technique, in that the phase locked-loop may as a result lose lock, which can go undetected, whereby a system failure would occur. Alternatively, even when the loss of a lock is detected, it takes time for a new phase locked-loop frequency, based upon a new multiplication ratio, to settle in, which may result in unpredictable system operation.
Therefore, a method of overcoming these problems would be desirable.
FIELD OF THE DISCLOSURE
The present disclosure relates generally to frequency generating devices, and more specifically to a frequency generating device and method using a phase locked-loop.


REFERENCES:
patent: 4567448 (1986-01-01), Ikeda
patent: 4904955 (1990-02-01), Ley
patent: 5378935 (1995-01-01), Korhonen et al.
patent: 5748044 (1998-05-01), Xue
patent: 6157247 (2000-12-01), Abdesselem et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Frequency generating device and method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-3203199

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.