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:
Apr. 02, 2002
Filed:
Apr. 20, 1998
Mitsunori Tsujino, Hyogo, JP;
Goro Hayakawa, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor integrated circuit includes: first and second counters activated upon receipt of a low level signal and outputting a signal with a period which is twice that of the signal input; first fuse circuits connected to first counters; and a second fuse circuit connected to second counter. First counters are inactivated when fuses included in first fuse circuits are disconnected, and second counter is activated when a fuse included in second fuse circuit is disconnected. Thus, the period of a signal for determining a refresh period can be efficiently adjusted. Here, the arrangement of first fuse circuits and a second fuse circuit can be converse.