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. 17, 2018
Filed:
Oct. 08, 2014
Fumihiro Shimizu, Kanagawa, JP;
Fumihiro Shimizu, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An angle detection device which includes multiple sensors to output multiple sinusoidal signals having different phases according to the rotation angle of a rotating body; a rotation calculation device to detect the rotation angle based on the multiple sinusoidal signals and detect an amplitude of the multiple sinusoidal signals to output the amplitude of the multiple sinusoidal signals as amplitude signal; and an amplitude comparison device to compare the amplitude signal with a predetermined amplitude target value and output an amplitude error signal indicating the comparison result; wherein the error of amplitude of the multiple sinusoidal signals is corrected by increasing or decreasing a drive input of a sensor driving unit based on the amplitude error signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile