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:
Dec. 13, 2022
Filed:
May. 26, 2021
Hajime Nakamura, Tokyo, JP;
Hajime Nakamura, Tokyo, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A sensor drive circuit for driving a sensor with a current includes at least one circuit configured to generate a drive current for the sensor, the drive current having a reverse temperature characteristic with respect to a temperature characteristic of an output voltage of the sensor. A temperature characteristic of sensor sensitivity has a negative first order coefficient and a positive second order coefficient. The sensor drive circuit includes a first current source configured to generate a first current having a temperature characteristic of which a first order coefficient is positive. The sensor drive circuit includes a second current source configured to generate a second current having a temperature characteristic of which a first order coefficient is negative. The sensor drive circuit includes a first current calculator configured to add the first current and the second current to generate a third current.