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:
Sep. 11, 1990
Filed:
Mar. 16, 1988
Applicant:
Inventors:
Kurt Hoffmann, Taufkirchen, DE;
Hans-Dieter Oberle, Puchheim, DE;
Rainer Kraus, Munich, DE;
Oskar Kowarik, Grafing, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365201 ; 365203 ; 365190 ; 371 211 ;
Abstract
A circuit configuration and method for testing storage cells of an integrated semiconductor memory precharges a pair of external bit lines to mutually complementary logic levels. All of the storage cells of a word line are always read-out in parallel. In a 'no fault' situation the pair of external bit lines retains its precharge level, whereas in the case of a fault, the level of the external bit line which is precharged to logical 1 falls. This is recognized by a discriminator circuit and analyzed.