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:
Jan. 23, 2001
Filed:
Sep. 30, 1998
Izuru Shinjo, Tokyo, JP;
Yasuyoshi Hatazawa, Tokyo, JP;
Takuji Nada, Tokyo, JP;
Masahiro Yokotani, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A magnetic detector D is disclosed which can perform precise detection even when a moving member of magnetic material is rotating at a very low speed, and can output a signal corresponding to recessed and projected portions of the moving member of magnetic material when the power is turned on and when the rotary member of magnetic material is stopped. The magnetic detector includes a rotary member of magnetic material, a detecting unit for detecting a displacement of the rotary member of magnetic material, an AC coupling circuit for removing a DC component from an output signal of the detecting unit, a comparison circuit for converting an output signal of the AC coupling circuit into a binary signal, an output circuit for outputting an output signal of the comparison circuit, and a variable resistor for setting a comparison level for the comparison circuit to a level between two different signal levels.