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:
Mar. 11, 1997
Filed:
May. 31, 1996
Toyonobu Yamada, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
This invention relates to a memory device internally employing an active period control signal for controlling an active period and an inactive period for internal operation. The memory device comprises a plurality of word lines and bit lines; memory cells provided at intersections thereof; a booster circuit, having an output terminal, for outputting to the output terminal a higher voltage than a power source voltage; and word drivers, connected to each of the word lines, for connecting the output terminal of the booster circuit to a corresponding word line in response to a word selection signals provided during the active period. The memory device also comprises a boosting control signal generation circuit supplying the booster circuit with a boosting control signal to continue a boosting operation of the booster circuit longer than the active period in response to the active period control signal. The output of the booster circuit can recover appropriate voltage level after the termination of the active period so that the error read operation can be avoided.