Synchronous self-timed clock pulse circuit having improved power

Details Synchronous self-timed clock pulse circuit having improved power Synchronous self-timed clock pulse circuit having improved power

1995-05-19

1996-05-14

Westin, Edward P.

Electronic digital logic circuitry

Clocking or synchronizing of logic stages or gates

327172, 327198, 327292, 327295, H03K 1900

Patent

active

055171370

ABSTRACT:
A self-timed synchronous clock pulse circuit (100) is disclosed that includes a pulse pull-down circuit (102) pulling a first pulse node (104) to ground upon receiving the rising edge of an external clock. A pulse generator (108) responsive to a high-to-low transition at the first pulse node (104) generates a second clock pulse. A pulse pull-up circuit (110) is responsive to the second edge of the second clock pulse and pulls the first pulse node (104) to the positive power supply. An initialization circuit (112) is provided to prevent a lock-up condition upon power-up by sampling the logic level of the first pulse node (104) on the rising edge of the external clock. The logic value is essentially held throughout the remainder of the clock cycle by gating the value into a second latch during the second portion of an external clock cycle. The sampled logic value is used to correct the lock-up condition by gating the logic level of the second latch (124) into a third latch (128) during a first portion of the external clock cycle, the output of the third latch (128) being coupled to an initialization pull-up circuit (114) which pulls the first pulse node (104) high such that within two clock cycles the power-up lock-up state is eliminated.

REFERENCES:
patent: 5265064 (1993-11-01), Davies
patent: 5289050 (1994-02-01), Ogasawara
patent: 5355090 (1994-10-01), Pajowski et al.

Affiliated with

Also associated with

Rating

Synchronous self-timed clock pulse circuit having improved power does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Synchronous self-timed clock pulse circuit having improved power, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous self-timed clock pulse circuit having improved power will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1898763