Logic circuit and semiconductor integrated circuit

Details Logic circuit and semiconductor integrated circuit Logic circuit and semiconductor integrated circuit

2006-08-29

2006-08-29

Barnie, Rexford (Department: 2819)

Electronic digital logic circuitry

Having logic levels conveyed by signal frequency or phase

C326S093000, C326S037000, C326S038000, C713S400000, C713S401000, C716S030000, C716S030000

Reexamination Certificate

active

07098696

ABSTRACT:
The invention provides a logic circuit to identify time difference between signals having a variation in delay, and an integrated circuit which can evaluate variations in delay among internal signals. By using a logic circuit which outputs different number of pulse depending on a relationship of delay when a first signal and a second signal which are a pair of digital signals having a time difference are inputted, variations in delay of internal signals of an integrated circuit can be evaluated. Specifically, an output signal is generated by a logical operation of values of the first signal and second signal in a period in which the first signal is High and the second signal is Low, and values of a first signal and a second signal immediately before them by using a latch circuit. Further, by using a delay circuit which can set a delay time of an input signal, time difference between signals can be evaluated quantitavely.

REFERENCES:
patent: 5306963 (1994-04-01), Leak et al.
patent: 5406198 (1995-04-01), Orihashi et al.
patent: 5438259 (1995-08-01), Orihashi et al.
patent: 5495188 (1996-02-01), Chen et al.
patent: 5842001 (1998-11-01), Kubota
patent: 6903991 (2005-06-01), Mullarkey et al.
patent: 6909417 (2005-06-01), Washio et al.
patent: 2003/0137330 (2003-07-01), Yazawa et al.
patent: 2005/0062512 (2005-03-01), Kato
patent: 05-007127 (1993-01-01), None
patent: 06-112782 (1994-04-01), None
patent: 10-145350 (1998-05-01), None
patent: 2000-187533 (2000-07-01), None
patent: 2002-084170 (2002-03-01), None
patent: 2003-216271 (2003-07-01), None

Affiliated with

Also associated with

Rating

Logic circuit and semiconductor integrated circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3654807