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:
Aug. 03, 2021
Filed:
Apr. 09, 2020
Rohm Co., Ltd., Kyoto, JP;
Fumihiko Terasaki, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
The present invention provides a voltage monitoring apparatus capable of stable operation even in a low-voltage region. The voltage monitoring apparatus () includes: an inner voltage generating portion (), lowering an input voltage (VIN) to generate an inner voltage (Vreg); an input voltage monitoring portion (), receiving a power supply from an output terminal of the inner voltage generating portion () to operate; a switch portion (), disposed between an input terminal of the input voltage (VIN) and the output terminal of the inner voltage generating portion (); and a switch driving portion (), turning on the switch portion () when the input voltage (VIN) is lower than a threshold voltage (for example, Vy<Vref), and turning off the switch portion () when the input voltage (VIN) is higher than the threshold voltage (for example, Vy>Vref). Furthermore, the threshold voltage is preferably set as, for example, turning off the switch portion () upon the inner voltage generating portion () changing to a state capable of outputting the inner voltage (Vreg) that is at least higher than a minimum operating voltage of the input voltage monitoring portion ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile