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. 09, 2025
Filed:
Jun. 03, 2022
Minebea Mitsumi Inc., Nagano, JP;
MINEBEA MITSUMI Inc., Nagano, JP;
Abstract
A rotation detection device includes: a first comparator configured to generate a first digital signal that indicates a magnitude relationship between a first voltage, which is output from a potentiometer in accordance with an amount of rotation of a rotating body, and a threshold voltage; a second comparator configured to generate a second digital signal that indicates a magnitude relationship between a second voltage, which is obtained by dividing the first voltage, and the threshold voltage; and a controller configured to detect a direction of rotation and a number of complete turns of the rotating body based on transition edges of the first digital signal and transition edges of the second digital signal. By this means, even when the rotating body rotates while not being driven, it is possible to detect the number of complete turns of the rotating body.