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. 14, 2026
Filed:
Feb. 16, 2023
Hioki E.e. Corporation, Nagano, JP;
Yuki Karasawa, Nagano, JP;
Kenta Ikeda, Nagano, JP;
Koki Nakazawa, Nagano, JP;
Peiyu Xia, Nagano, JP;
Kimihiko Yamagishi, Nagano, JP;
HIOKI E.E. CORPORATION, Nagano, JP;
Abstract
An excitation circuit includes a first operational amplifier that supplies a first excitation current to a first coil constituting a first flux gate, and a second operational amplifier that supplies a second excitation current to a second coil constituting a second flux gate. The excitation circuit further includes a signal generation circuit that generates input signals for the first operational amplifier and the second operational amplifier. The signal generation circuit includes a third operational amplifier that generates an inverted voltage or a non-inverted voltage based on an AC excitation voltage for exciting the pair of flux gates as an input signal for the first operational amplifier, and a fourth operational amplifier that generates an inverted voltage or a non-inverted voltage based on the AC excitation voltage as an input signal for the second operational amplifier.