Flip-flop cell having clock skew protection

Details Flip-flop cell having clock skew protection Flip-flop cell having clock skew protection

1996-10-09

1998-06-30

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327212, 327213, G01R 3128

Patent

active

057740038

ABSTRACT:
A flip-flop cell having a main data input, a main scan data input, a main data output and a main clock input. The flip-flop cell includes a multiplexer having first and second inputs and an output. The first input is coupled to the main data input of the flip-flop cell and the second input is coupled to the main scan data input of the flip-flop cell. A first latch has a data input, a data output and an inverting clock input. The data input of the first latch is coupled to the output of the multiplexer. A second latch has a data input, a data output and a non-inverting clock input. The data input of the second latch is coupled to the data output of the first latch. A third latch has a data input, a data output and an inverting clock input. The data input of the third latch is coupled to the data output of the second latch, and the data output of the third latch is coupled to the main data output of the flip-flop cell. The inverting clock input of the first latch, the non-inverting clock input of the second latch, and the inverting clock input of the third latch are all coupled to the main clock input of the flip-flop cell.

REFERENCES:
patent: 4873456 (1989-10-01), Olisar et al.
patent: 5115435 (1992-05-01), Langford, II et al.
patent: 5172011 (1992-12-01), Leuthold et al.
patent: 5172397 (1992-12-01), Llewellyn
patent: 5210759 (1993-05-01), DeWitt et al.
patent: 5347523 (1994-09-01), Khatri et al.
patent: 5390190 (1995-02-01), Nanda et al.
patent: 5418481 (1995-05-01), Sikkink et al.
patent: 5477545 (1995-12-01), Haung
patent: 5537062 (1996-07-01), Mote, Jr.
patent: 5574731 (1996-11-01), Qureshi
patent: 5587682 (1996-12-01), Ranganathan et al.
patent: 5594367 (1997-01-01), Trimberger et al.
patent: 5606565 (1997-02-01), Edler et al.
patent: 5619157 (1997-04-01), Kumata et al.
patent: 5633606 (1997-05-01), Gaudet et al.
patent: 5646567 (1997-07-01), Felix
Fazal Ur Rehman Qureshi, "Declaration of Fazal Ur Rehman Qureshi" (regarding U.S. Patent Application No. 08/727,289), dated Sep. 23, 1997, pp. 1-3 and Exhibits A and B.
National Semiconductor, Amplifier Applications, "LMC6980/84/88 Fuel Gauge & Charge Control Solution", date unknown, pp. 1-66 thru 1-71, no date.
National Semiconductor, "Intelligent Batteries Provide Updated Status Information, Longer Battery Life", date unknown, pp. 1-3, internet address: http://www.national.com/appinfo/lowpowervolt/brochure/8.sub.-- 9.html, no date.
Hill and Peterson, "Digital Logic and Microprocessors", John Wiley & Sons, 1984, pp. 491-493, no month.
Masakazu Shoji, "CMOS Digital Circuit Technology", Prentice Hall, 1988, pp. 299-307, no month.
Gibson and Liu, "Microcomputers for Engineers and Scientists", Prentice-Hall, Inc., 1987, pp. 103-109, no month.
Harold S. Stone, "Microcomputer Interfacing", Addison-Wesley, 1982, pp. 88-100, no month.

Affiliated with

Also associated with

Rating

Flip-flop cell having clock skew protection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flip-flop cell having clock skew protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flip-flop cell having clock skew protection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1863941