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:
Feb. 22, 1994
Filed:
Apr. 20, 1992
Applicant:
Inventors:
Duane A Schroeder, White Bear Lake, MN (US);
David M Hime, Blaine, MN (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
3241 / ; 3241 / ; 324 731 ; 371 223 ;
Abstract
A test circuit for two level latches on an integrated circuit to be tested includes a test enable driver circuit coupled to a third level switch which is connected in series between the latches to be tested and a low voltage source. The third level switch converts the two level latches to be tested into a buffer such that data applied as an input to the two level latches appears in identical form as data at the output pin of the integrated circuit chip.