The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2008
Filed:
Dec. 12, 2006
Sebastian Ehrenreich, Schoenau, DE;
Jente B Kuang, Austin, TX (US);
Chun-tao LI, Rochester, MN (US);
Hung Cai Ngo, Austin, TX (US);
Sebastian Ehrenreich, Schoenau, DE;
Jente B Kuang, Austin, TX (US);
Chun-Tao Li, Rochester, MN (US);
Hung Cai Ngo, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
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.