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. 28, 2010
Filed:
Jan. 09, 2009
Kenichi Nakazato, Tokyo, JP;
Hisashi Nishimura, Tokyo, JP;
Kenichi Nakazato, Tokyo, JP;
Hisashi Nishimura, Tokyo, JP;
Japan Aviation Electronics Industry Limited, Tokyo, JP;
Abstract
Two-phase resolver signals output from a rotation angle detector are squared by first and second squaring circuits. The squared signals are added by an adding circuit. The DC component of the output signal from the adding circuit is removed by a filter. The output signal from the filter is compared with a reference potential by a comparator to generate a rectangular-wave signal. The phase of the rectangular-wave signal is corrected a phase shifter. The frequency of the output signal from the phase shifter is divided by 2 by a frequency dividing circuit in synchronization with an excitation signal supplied to the rotation angle detector to generate a synchronous clock.