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:
Nov. 17, 1987
Filed:
Sep. 06, 1985
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01R / ;
U.S. Cl.
CPC ...
3241 / ; 324 / ;
Abstract
An integrated circuit is constructed in order that tests can be conducted on a plurality of circuits to determine which of the circuits is defective. In particular, the circuit is constructed to allow such testing with the use of fewer input and output pins for testing. To accomplish this, a first buffer gate circuit, a resistor, and a second buffer gate are connected in series in the order mentioned between the output terminal of a first circuit and the input terminal of a second circuit. An input and output terminal pin for testing is located at a junction point of the resistor and second buffer gate.