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:
Oct. 19, 1999
Filed:
Mar. 05, 1998
Applicant:
Inventors:
Hiromasa Noda, Tokyo, JP;
Kenji Nishimoto, Urawa, JP;
Yoshitaka Kinoshita, Akishima, JP;
Masakazu Aoki, Tokorozawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ; 36518907 ;
Abstract
An X address buffer for generating an internal address signal by capturing an X address signal input from an address terminal is brought into an operating state before an external control clock is input. A redundancy address comparator for detecting a match/mismatch signal by comparing the generated internal address signal with a stored X-system defective address is used as a static circuit. Thereby, the redundancy address comparator starting operation is accelerated and as a result, acceleration of the reading operation is achieved.