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:
Jul. 10, 1990
Filed:
Apr. 25, 1988
Shouji Wada, Ohme, JP;
Nobuo Komatsu, Akishima, JP;
Mitsuhiro Takano, Ohme, JP;
Sinichi Miyatake, Ohme, JP;
Kazuo Mihashi, Akishima, JP;
Hiromi Tsukada, Kokubunji, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corp., Tokyo, JP;
Abstract
A dynamic type RAM is provided wherein the level of a precharge control signal supplied to a gate of a precharge MOSFET to precharge complementary data lines to a half level is made the half level during a period from the memory access until the selection of the word line, at the latest. Also, the precharge control signal, corresponding to a memory mat selected according to establishing of an address, is set to a low level, while the precharge control signal corresponding to a non-selective memory mat is set to a high level.