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. 27, 1990
Filed:
Sep. 06, 1988
Kanji Oishi, Koganei, JP;
Takashi Shinoda, Kodaira, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A semiconductor integrated circuit device which constitutes a dynamic RAM has an automatic refresh circuit that contains a refresh timer circuit. The refresh timer circuit has a program element such as a fuse element. The program element is programmed depending upon the data holding characteristics of the dynamic memory cells. Therefore, the refresh period is changed depending upon the characteristics of the dynamic memory cells. According to this construction, the refresh period changes and, as a result, any undesired refresh operation is prevented from being executed, making it possible to reduce the amount of electric power consumed by the circuit device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile