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. 08, 2023
Filed:
Nov. 16, 2021
Hioki E.e. Corporation, Nagano, JP;
Katsutoshi Nishijima, Nagano, JP;
HIOKI E.E. CORPORATION, Nagano, JP;
Abstract
To provide a measuring apparatus that can detect a wide range of capacitance values with high sensitivity. The measuring apparatus includes an alternating-current signal generator that generates N (where N is a natural number not less than 2) detection alternating-current signals with different frequencies, a superpositioner that superposes the N detection alternating-current signals, multiplication processors that respectively multiply the N detection alternating-current signals with different frequencies by a measurement alternating-current signal output from a device under test to which a detection alternating-current signal obtained through the superposition has been applied, thereby obtaining N synchronous detection signals, low-pass filter processors that perform a low-pass filter process on the N synchronous detection signals to obtain N direct-current voltage signals, and a capacitance measurer that measures as the capacitance value of the device under test a capacitance value corresponding to the voltage values of the N direct-current voltage signals.