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:
Jul. 30, 2013
Filed:
Oct. 19, 2010
Yoshinori Tatenuma, Chiyoda-ku, JP;
Hideki Shimauchi, Chiyoda-ku, JP;
Masahiro Yokotani, Chiyoda-ku, JP;
Yuji Kawano, Chiyoda-ku, JP;
Hiroshi Kobayashi, Chiyoda-ku, JE;
Kazuyasu Nishikawa, Chiyoda-ku, JP;
Manabu Tsukamoto, Chiyoda-ku, JP;
Yoshinori Tatenuma, Chiyoda-ku, JP;
Hideki Shimauchi, Chiyoda-ku, JP;
Masahiro Yokotani, Chiyoda-ku, JP;
Yuji Kawano, Chiyoda-ku, JP;
Hiroshi Kobayashi, Chiyoda-ku, JE;
Kazuyasu Nishikawa, Chiyoda-ku, JP;
Manabu Tsukamoto, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A magnetic detection apparatus includes a first comparison circuit that waveform-shapes the amplitude of a detection signal from magneto-electric transducers by DC coupling, a third comparison circuit that waveform-shapes the detection signal by AC coupling, an oscillation circuit having a natural frequency, a control circuit that counts the output of the first comparison circuit by using the oscillation means, and a selection circuit that selects the output of the first comparison means and the output of the second comparison means. The control circuit counts rising from the next rising or falling from the next falling of an output rectangular wave of the first comparison circuit, and provides output to the selection circuit at the time point at which the count value reaches a desired value. The selection circuit selects and outputs the output rectangular wave of the first comparison circuit or the third comparison circuit.