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. 21, 1989
Filed:
Feb. 24, 1987
Applicant:
Inventors:
Assignees:
Hitachi Ltd., Tokyo, JP;
Hitachi VLSI Engineering Corp., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365189 ; 365203 ; 307269 ;
Abstract
A dynamic RAM is provided in which an output voltage of a booster circuit for forming a word line selection timing signal is rendered greater than a power source potential and less than a predetermined potential by providing voltage limitation means, thereby preventing destruction of circuit elements receiving the output voltage.