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:
Jul. 29, 2025
Filed:
May. 30, 2023
Hitachi High-tech Corporation, Tokyo, JP;
Satoshi Konishi, Tokyo, JP;
Hiroshi Toda, Tokyo, JP;
Naoya Ishigaki, Tokyo, JP;
Kazuki Sato, Tokyo, JP;
Hitachi High-Tech Corporation, Tokyo, JP;
Abstract
Provided is a high-voltage control circuit capable of shortening a time required for voltage bucking with a simple configuration without requiring a complicated control algorithm. A high-voltage control circuitincludes: a high-voltage rectifier circuitconfigured to convert an AC voltage into a DC high voltage; a smoothing capacitorconfigured to smooth the DC high voltage output from the high-voltage rectifier circuit; a switch circuitconnected in parallel to the smoothing capacitor; a feedback circuitincluding an error amplifierconfigured to amplify a differential voltage Vdf between a command voltage Viv and a divided voltage Vdv following the DC high voltage, and configured to control the high-voltage rectifier circuitbased on an output signal of the error amplifier; and an amplifierconfigured to amplify the differential voltage Vdf. The switch circuitis controlled by an output signal of the amplifier