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:
Feb. 06, 2007
Filed:
Apr. 12, 2005
Norihiro Kurumado, Kasugai, JP;
Norihiro Kurumado, Kasugai, JP;
Denso Corporation, Kariya, JP;
Abstract
A rotation detection apparatus utilizes a bias magnet and an array of four or more sets of magnetoresistive elements, with each set producing an output potential varying according to changes of a magnetic field vector as protrusions and recessed portions of a rotor periphery move past the array, and utilizes differential amplifiers to operate on specific combinations of the output potentials for deriving a detection signal expressing rotation information. By appropriately adjusting respective positions of the sets of magnetoresistive elements and/or respective amplification factors of the differential amplifiers, suitable detection characteristics for various rotor configurations can be obtained.