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. 15, 2026
Filed:
May. 11, 2022
Hitachi High-tech Corporation, Tokyo, JP;
Ryohei Kudo, Tokyo, JP;
Tomoharu Nagashima, Tokyo, JP;
Hisaaki Kanai, Tokyo, JP;
Wen Li, Tokyo, JP;
Shinichi Murakami, Tokyo, JP;
Naoya Ishigaki, Tokyo, JP;
HITACHI HIGH-TECH CORPORATION, Tokyo, JP;
Abstract
The high voltage amplifier includes: an input circuit configured to amplify an input signal and connected to a positive-electrode-side level shift circuit and a negative-electrode-side level shift circuit; a high-voltage output circuit including a positive-electrode-side output circuit configured to amplify a signal from the positive-electrode-side level shift circuit and a negative-electrode-side output circuit configured to amplify a signal from the negative-electrode-side level shift circuit; a feedback circuit which feeds back an output signal from the high-voltage output circuit to the input signal; a detection circuit configured to detect currents of the positive-electrode-side and negative-electrode-side output circuits, and an offset adjustment circuit configured to increase an offset amount of the negative-electrode-side level shift circuit to a negative side when a current of the positive-electrode-side output circuit increases, and increase an offset amount of the positive-electrode-side level shift circuit to a positive side when a current of the negative-electrode-side output circuit increases.