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. 10, 1993
Filed:
Mar. 21, 1991
Applicant:
Inventor:
Robert Edwards, San Jose, CA (US);
Assignee:
Amdahl Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 223 ;
Abstract
A mesh comprised of intersecting control lines and clock-passing elements is distributed across the substrate of an integrated circuit (IC) chip to control the distribution of clock pulses to clock-sensitive scan latches also provided on the IC chip. The mesh consumes a relatively small portion of the surface area over the substrate. Clock-insensitive scan latches drive the control lines to create a pattern of enabled and disabled clock-passing elements such that the dynamic performance of one or more subcircuits on the IC chip can be tested through an on-chip scan testing subsystem.