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. 03, 2010
Filed:
Dec. 19, 2008
Applicants:
Kenichi Nakazato, Tokyo, JP;
Hisashi Nishimura, Tokyo, JP;
Inventors:
Kenichi Nakazato, Tokyo, JP;
Hisashi Nishimura, Tokyo, JP;
Assignee:
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M 1/48 (2006.01);
U.S. Cl.
CPC ...
Abstract
A band elimination filterthat eliminates or reduces a low frequency noise superposed on resolver signals Sand Sis provided between a synchronous detection circuitthat performs synchronous detection by referring to an excitation signal and a controllerthat controls a digital angle output φ to make a deviation (sin(θ−φ)), which is the output of the synchronous detection circuit, zero.