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:
Mar. 16, 2021
Filed:
Sep. 12, 2018
Renesas Electronics Corporation, Tokyo, JP;
RENESAS ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
An impedance measuring semiconductor circuit that measures impedance of a specimen. The impedance measuring semiconductor circuit includes an operational amplifier, a resistance coupled between a negative input terminal and an output terminal of the operational amplifier, a D/A converter coupled to a positive input terminal, a switch; an A/D converter that is coupled with the output terminal of the operational amplifier and a one-side terminal of a specimen and measures an output voltage from the operational amplifier and a one-side terminal voltage, and a controller that controls an output voltage from the D/A converter based on a one-side terminal voltage measured by the A/D converter.