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:
Mar. 19, 1996
Filed:
Mar. 31, 1994
Applicant:
Inventors:
Alan Martin, Plymouth, GB;
Richard Albon, Tavistock, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365201 ; 365190 ;
Abstract
In a static random access memory made up of six-transistor memory cells arranged in rows and columns, an arrangement for detecting open circuit or 'soft' defects in the individual inverters of a memory cell includes lowering the supply voltage of a cell under test to overcome the clamping effect of a feedback inverter, applying input signal voltage changes to one of the bit lines associated with the cell, and testing for the expected voltage changes on the other bit line associated with the cell.