Static information storage and retrieval – Read/write circuit – Testing
Reexamination Certificate
2006-12-12
2008-08-19
Hoang, Huan (Department: 2827)
Static information storage and retrieval
Read/write circuit
Testing
C365S194000, C714S718000
Reexamination Certificate
active
07414904
ABSTRACT:
A method for storage cell design evaluation provides accurate information about state changes in static storage cells. A wordline select pulse is propagated along the wordline select path of the test row to an output driver circuit, in order to test the clock and/or address timing of the row, so that variation of access timing, read stability and writeability with wordline strength/access voltage can be determined. An access detection cell holds the input of the output driver circuit until a simulated access operation activated by the wordline select pulse is complete. Multiple test rows may be cascaded among columns to provide a long delay line or ring oscillator for improved measurement resolution.
REFERENCES:
patent: 5781469 (1998-07-01), Pathak et al.
patent: 5870404 (1999-02-01), Ferraiolo et al.
patent: 6538522 (2001-10-01), Aipperspach et al.
patent: 6452459 (2002-09-01), Chan et al.
patent: 6909301 (2002-09-01), Korson et al.
patent: 7046094 (2004-03-01), Belluomini et al.
patent: 6958659 (2005-10-01), Nakajima
patent: 7071736 (2006-07-01), Wikstrom
patent: 7190233 (2007-03-01), Bhushan et al.
patent: 2002/0135343 (2002-09-01), Underbrink et al.
patent: 2004/0061561 (2004-04-01), Monzel et al.
patent: 2005/0063232 (2005-03-01), Chan et al.
patent: 2005/0078508 (2005-04-01), Chan et al.
patent: 2005/0204211 (2005-09-01), Gouin et al.
patent: 2005/0213371 (2005-09-01), Kimura
patent: 2006/0050600 (2006-03-01), Venkatraman et al.
patent: 2006/0097802 (2006-05-01), Chan et al.
patent: 09294055 (1997-11-01), None
U.S. Appl. No. 11/225,652, filed Sep. 13, 2005, Joshi et al.
U.S. Appl. No. 11/250,019, filed Oct. 13, 2005, Joshi et al.
U.S. Appl. No. 11/250,061, filed Oct. 13, 2005, Kuang et al.
U.S. Appl. No. 11/260,571, filed Oct. 27, 2005, Chuang et al.
U.S. Appl. No. 11/549,138, filed Oct. 13, 2006, Carpenter et al.
U.S. Appl. No. 11/559,436, filed Nov. 14, 2006, Carpenter 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.
Ehrenreich Sebastian
Kuang Jente B
Li Chun-Tao
Ngo Hung Cai
Harris Andrew M.
Harris, Atty at Law, LLC Mitch
Hidalgo Fernando N
Hoang Huan
International Business Machines - Corporation
LandOfFree
Method for evaluating storage cell design using a wordline... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for evaluating storage cell design using a wordline..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for evaluating storage cell design using a wordline... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4017303