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. 31, 1993
Filed:
May. 12, 1992
Applicant:
Inventor:
Junji Nishiura, Gyoda, JP;
Assignee:
Advantest Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
3241 / ; 371 221 ;
Abstract
The output of a tri-state driver is connected with I/O pins of test IC elements via load resistors. The I/O pins are connected to the input terminals of corresponding comparators. Under the state where the I/O control signal given to the driver indicates an input condition, the driver generates either the first or the second level corresponding to the logic level of input test pattern data. Under the state where the I/O control signal indicates an output condition, the driver generates the third level which is different from the first and the second level.