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:
Sep. 05, 2006
Filed:
Jun. 30, 2004
Hirofumi Saito, Kanagawa, JP;
Hirofumi Saito, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
The power-supply voltage detection circuit to detect that an external power-supply voltage and/or an internal power-supply voltage generated from the external power-supply voltage goes out of predetermined regulation comprises a first comparator for detecting the internal power-supply voltage being equal to or less than a predetermined value, a second comparator for detecting the internal power-supply voltage being greater than a predetermined value, a first capacitor for AC-coupling one of the input terminals of the first comparator to the external power-supply voltage, and a second capacitor for AC-coupling one of the input terminals of the second comparator to the external power-supply voltage.