Circuit to measure skew

Details Circuit to measure skew Circuit to measure skew

2005-06-14

2008-09-09

Britt, Cynthia (Department: 2117)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Skew detection correction

Reexamination Certificate

active

07424650

ABSTRACT:
A method and test circuits for measuring skew between two circuit blocks of an integrated circuit. A first data signal is propagated through a first circuit block and a first clock signal is propagated through a second circuit block. The first data signal is latched synchronized to the first clock signal after propagating the first data and clock signals. The first data signal is time shifted relative to the first clock signal until the first data signal is no longer validly latching. A second data signal is propagated through the second circuit block and a second clock signal is propagated through the first circuit block. An inversion of the second data signal synchronized to an inversion of the second clock signal is latched. Then, the second data signal is time shifted relative to the second clock signal until the inversion of the second data signal is no longer validly latching.

REFERENCES:
patent: 5047710 (1991-09-01), Mahoney
patent: 5463655 (1995-10-01), Llewellyn
patent: 5579352 (1996-11-01), Llewellyn
patent: 5740210 (1998-04-01), Rokugawa
patent: 6850051 (2005-02-01), Roberts et al.
patent: 6946640 (2005-09-01), Kawamura

Affiliated with

Also associated with

Rating

Circuit to measure skew does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit to measure skew, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit to measure skew will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3981222