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:
Nov. 10, 1998
Filed:
Nov. 12, 1997
Masato Koura, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention includes a redundant circuit for addressing redundant memory cells. The redundant circuit solves a problem of a conventional redundant circuit caused by injection of electrons into and leakage of electrons from a floating gate of a non-volatile memory cells provided for respective bits of the addressing circuit of the redundant circuit. The redundant circuit has a timer that counts an elapsed time from power-on of the redundant circuit. The timer produces a timing signal when a fixed duration time period has elapsed. A breaker breaks the application of a supply voltage to the gate of a non-volatile memory cell in response to the timing signal.