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:
Jul. 24, 1984
Filed:
Feb. 26, 1982
Applicant:
Inventors:
Ronald W Knepper, Lagrangeville, NY (US);
Peter J Ludlow, Hopewell Junction, NY (US);
Joseph A Petrosky, Jr, Lagrangeville, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ;
Abstract
A word redundancy scheme for a high speed RAM where the bit output stage uses on-chip logic. An extra emitter on each of the decoders is utilized including redundant word group decoders. A compare circuit has an output to each of the extra emitters and when the address of a bad bit arrives at the compare circuit it de-selects each of the non-redundant decoders at that address and selects the redundant decoders via the extra emitters. Hence, the redundant decoders replace the decoders of the bad bit position.