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:
May. 09, 2000
Filed:
Mar. 19, 1999
Kenya Uesugi, Ogaki, JP;
Sadao Yoshikawa, Gifu-ken, JP;
Sanyo Electric Co. Ltd., Osaka, JP;
Abstract
A write control circuit that generates a control signal to initiate a write operation for a semiconductor memory device, such as an EEPROM, compensates for fluctuations in the supply voltage. The write control circuit includes a control potential generator that produces a first control potential which is kept higher than the ground potential and a second control potential which is kept lower than the supply potential. A first transistor is connected to the supply potential and receives a write potential at its gate. A second transistor is connected between the first transistor and ground and receives the first control potential at its gate. A third transistor is connected to the supply potential and receives the second control potential at its gate. A fourth transistor is connected between the third transistor and ground and receives a potential from a first node between the first and second transistors at its gate. The control signal is generated at a second node between the third and fourth transistors. The control signal is activated when the write potential reaches a certain value.