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:
Apr. 24, 2012
Filed:
Jul. 17, 2009
Takashi Hara, Ichinomiya, JP;
Hidenobu Muramatsu, Kariya, JP;
Glenn A. Forrest, Bow, NH (US);
Hitoshi Yabusaki, Londonderry, NH (US);
Naota Nakayama, Derry, NH (US);
Takashi Hara, Ichinomiya, JP;
Hidenobu Muramatsu, Kariya, JP;
Glenn A. Forrest, Bow, NH (US);
Hitoshi Yabusaki, Londonderry, NH (US);
Naota Nakayama, Derry, NH (US);
Aisin Seiki Kabushiki Kaisha, Aichi-ken, JP;
Allegro Microsystems, Inc., Worcester, MA (US);
Abstract
A rotation sensor includes a detecting portion, a rotational state determining portion and a pulse generating portion. The detecting portion detects a rotation of a rotational member and outputs a detection signal. The rotational state determining portion determines a rotational state of the rotational member on the basis of the detection signal in a predetermined period. The pulse generating portion generates and outputs a first pulse and a second pulse, of which waveforms differ from each other, in response to a rotational direction of the rotational member after the predetermined period. The pulse generating portion further generates and outputs a third pulse regardless of the rotational state of the rotational member in the predetermined period.