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. 02, 1994
Filed:
Feb. 12, 1992
Applicant:
Inventors:
Kyoko Ishii, Tokyo, JP;
Shinichi Miyatake, Hamura, JP;
Tsutomu Takahashi, Akishima, JP;
Shinji Udo, Akishima, JP;
Hiroshi Yoshioka, Akishima, JP;
Mitsuhiro Takano, Tokorozawa, JP;
Makoto Morino, Akishima, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corp., Kodaira, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ; H03K / ;
U.S. Cl.
CPC ...
365226 ; 3072968 ; 36518909 ;
Abstract
A semiconductor memory device has a plurality of divided memory blocks, each of which has its X-system addresses assigned so that an equal number of word lines in a plurality of sets of memory mats and sense amplifiers may be selected. Each memory block is equipped with a plurality of internal voltage drop circuits for generating a supply voltage from the outside into the operating voltages of the sense amplifiers.