Static information storage and retrieval – Addressing – Sync/clocking
Reexamination Certificate
2007-11-06
2010-02-23
Ho, Hoai V (Department: 2827)
Static information storage and retrieval
Addressing
Sync/clocking
C365S230060, C365S185250, C365S203000, C365S194000
Reexamination Certificate
active
07668037
ABSTRACT:
A storage array including a local clock buffer with programmable timing provides a mechanism for evaluating circuit timing internal to the storage array. The local clock buffer can independently adjust the pulse width of a local clock that controls the wordline and local bitline precharge pulses and the pulse width of a delayed clock that controls the global bitline precharge, evaluate and read data latching. The delay between the local clock and the delayed clock can also be adjusted. By varying the pulse widths of the local and delayed clock signal, along with the inter-clock delay, the timing margins of each cell in the array can be evaluated by reading and writing the cell with varying pulse width and clock delay. The resulting evaluation can be used to evaluate timing margin variation within a die, as well variation from die-to-die and under varying environments, e.g., voltage and temperature variation.
REFERENCES:
patent: 4769791 (1988-09-01), Liou et al.
patent: 5122978 (1992-06-01), Merrill
patent: 6252820 (2001-06-01), Nakamura
patent: 6414535 (2002-07-01), Ooishi
patent: 6549452 (2003-04-01), Park
patent: 6891772 (2005-05-01), Demone
patent: 2002/0152434 (2002-10-01), Dawson et al.
patent: 2004/0105339 (2004-06-01), Iwahashi et al.
patent: 2005/0204211 (2005-09-01), Gouin et al.
U.S. Appl. No. 11/840,481, filed Aug. 17, 2007, Cases, et al.
U.S. Appl. No. 11/840,498, filed Aug. 17, 2007, Cases, et al.
U.S. Appl. No. 11/250,061, filed Oct. 13, 2005, Kuang, et al.
U.S. Appl. No. 11/609,598, filed Dec. 12, 2006, Ehrenreich, et al.
U.S. Appl. No. 11/682,542, filed Mar. 6, 2007, Carpenter, et al.
U.S. Appl. No. 11/781,994, filed Jul. 24, 2007, Kuang, et al.
Carpenter Gary D.
Gebara Fadi H.
Kao Jerry C.
Kuang Jente B
Nowka Kevin J.
Handelsman Libby Z.
Harris Andrew M.
Ho Hoai V
International Business Machines - Corporation
Lappas Jason
LandOfFree
Storage array including a local clock buffer with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Storage array including a local clock buffer with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Storage array including a local clock buffer with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4180527