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. 04, 2003
Filed:
Dec. 09, 1999
Applicant:
Inventor:
Hideshi Maeno, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 3/128 ; H03K 1/900 ;
U.S. Cl.
CPC ...
G01R 3/128 ; H03K 1/900 ;
Abstract
A semiconductor device comprising a memory circuit, a switch for relieving the memory circuit of its failures, and a logic circuit to be tested, facilitates a test of the logic circuit. When a switch control signal (SET) is “1”, for example, a switch ( ) selects predetermined 1-bit data (=c) from a plurality of 1-bit data (=b) outputted in parallel form from a RAM ( ) and outputs it to a logic circuit ( ), where c<b.