Divide-by-one or divide-by-two qualified clock driver with glitc

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – Having selection between plural continuous waveforms

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

327115, 327117, H03K 1700

Patent

active

060492368

ABSTRACT:
A method and system for a clock driver is described which can buffer an master clock directly, or generate a output clock signal having a balanced duty cycle which is the input clock frequency divided by a predetermined value. When a frequency control input, such as a rate signal, is switched, the clock output makes a glitchless transition from one frequency to the other. The clock driver includes a counter divider circuit with feedback to produce two signals related by a predetermined phase difference. The counter divider circuit employs predetermined logic delays by buffered gating controlled by the master clock, which produces two signals. These two signals act as "enable" control signals such that the timing of their rising and falling edges is arranged to never propagate through the clock divider circuit to become the edges of output clock. The master clock is gated with these two signals to provide two unbalanced signals which are synchronous to the input clock signal. In addition, these two unbalanced signals have waveforms such that they may then be logically combined to form a single, balanced signal in a glitchless manner. Furthermore, transitions between fast, slow, and disable modes of operation for such clock driver circuit are also synchronous with the master clock and glitchless.

REFERENCES:
patent: 4445215 (1984-04-01), Svendsen
patent: 5379038 (1995-01-01), Matsumoto
patent: 5552732 (1996-09-01), Huang
patent: 5563594 (1996-10-01), Ford 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

Divide-by-one or divide-by-two qualified clock driver with glitc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Divide-by-one or divide-by-two qualified clock driver with glitc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Divide-by-one or divide-by-two qualified clock driver with glitc will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1179699

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