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:
Oct. 25, 2022
Filed:
Jun. 15, 2021
Winbond Electronics Corp., Taichung, TW;
Naoaki Sudo, Kanagawa, JP;
Winbond Electronics Corp., Taichung, TW;
Abstract
A power down detection circuit that may detect a supply voltage decrease more accurately is provided. The power down detection circuit includes a BGR circuit generating a reference voltage VREF, a resistance division circuit generating a first internal voltage VCC_DIVand a second internal voltage VCC_DIVbased on a supply voltage VCC, a first comparator outputting a reset signal PDDRST when detecting VCC_DIV<VREF, a second comparator outputting a switching signal SEL when detecting VCC_DIV<VREF, a charging pump circuit generating a boosted voltage VXX based on the supply voltage VCC, and a switching circuit switching an operating voltage supplied to the BGR circuit to the supply voltage VCC or the boosted voltage VXX based on the switching signal SEL.