Clock generator and clock generating method capable of varying c

Details Clock generator and clock generating method capable of varying c Clock generator and clock generating method capable of varying c

1998-10-26

2000-04-11

Lam, Tuan T.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327115, 327116, H03L 708

Patent

active

060492384

ABSTRACT:
A clock generator including a frequency multiplier, a phase lock circuit and a frequency divider. The frequency multiplier generates a frequency multiplied clock by multiplying the frequency of an input clock. The phase lock circuit detects a phase difference between the input clock and a frequency divided clock, and generates, by delaying the frequency multiplied clock by an amount corresponding to the phase difference, a phase-locked clock with its phase locked with the input clock. The frequency divider detects in every fixed cycle a particular pulse of the phase-locked clock, and generates the frequency divided clock by dividing the phase-locked clock with reference to the particular pulse of the phase-locked clock. In particular, the frequency divider detects the particular pulse immediately previous to a falling edge of the input clock. This can reduce the phase difference between the input clock and the phase-locked clock, and hence to solve a problem of a conventional clock generator in that a delay time of a digital delay line in a phase lock circuit must be lengthened with a reduction in the multiplication number of the frequency multiplied clock, which requires a greater number of delay elements because of a large occupying area of the delay elements and a decoder, thereby increasing the circuit scale and cost of a chip to reduce the multiplication number of the frequency multiplied clock.

REFERENCES:
patent: 5896428 (1999-04-01), Yamagiuchi
Technical Report of the Institute of Electronics, Information and Communication Engineers of Japan, vol. 97, No. 106, pp. 29-36, Jun. 1997.

Affiliated with

Also associated with

Rating

Clock generator and clock generating method capable of varying c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Clock generator and clock generating method capable of varying c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock generator and clock generating method capable of varying c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1179718