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:
Jun. 03, 1997
Filed:
Feb. 28, 1996
Applicant:
Inventor:
Tokuya Osawa, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
371 211 ; 371 212 ; 371 213 ; 371 225 ;
Abstract
It is an object to reduce circuit scale and increase operation speed of a memory test circuit which performs a memory test according to the ping-pong pattern. An address signal of a remarked cell is generated by an LFSR (76) and address signals for other cells are generated by an LFSR (75). The LFSR (76) updates the generated address signal every time the LFSR (75) generates one cycle of address signals. The address signals of the LFSR's (75, 76) are alternately switched by a selector circuit (78) and outputted to a RAM (2A).