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. 05, 1985
Filed:
Nov. 08, 1982
Applicant:
Inventor:
William H McAnney, Fishkill, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
371 25 ; 324 / ; 364900 ;
Abstract
The LSSD scan paths of each logic circuit chip on a circuit module are connected to additional test circuit chips on the same module. The test chips contain a random signal generator and data compression circuit to perform random stimuli signature generators and also contain switching circuits to connect the scan paths of the chips in parallel between different stages of the random signal generator and the data compression means for random stimuli signature generators and to disconnect the scan paths from the signal generator and data compression circuitry and arrange them serially in a single scan path to perform other tests.