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. 04, 2003
Filed:
Apr. 12, 2000
Kazuaki Kubo, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A memory circuit allowing data to be read when a source voltage decreases below the threshold of a selecting transistor comprises a selecting transistor and a series-connected memory transistor, a power source for supplying a source voltage, a voltage detecting circuit for detecting a voltage of the source voltage, a boosting circuit for boosting the source voltage when it has fallen to a value near or below the threshold voltage of the selecting transistor, and a boosted voltage detecting circuit for detecting the boosted voltage and controlling the boosting circuit to boost the source voltage to a value within a range having a lower limit greater than the threshold voltage of the selecting transistor. The boosting circuit generates a boosted voltage that is applied to a word line via high-voltage switch.