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:
Jan. 27, 2026
Filed:
Jul. 06, 2023
Rohm Co., Ltd., Kyoto, JP;
Natsuki Yamamoto, Kyoto, JP;
Satoru Nate, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A full-rectified voltage of an alternating-current is generated on a target wiring, and another rectification voltage is fed to a first input terminal. A second input terminal is connected to the target wiring. A main capacitor is provided between a potential control terminal and the target wiring. A first switching element is provided between the potential control terminal and the ground. In the supply period of the alternating-current voltage, the first switching element is turned on and off based on the voltages at the first input terminal and the potential control terminal. When power failure is sensed, an interphase capacitor is discharged via the first input terminal and a second switching element and then the main capacitor is discharged via the first and second switching elements.