Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator
Patent
1996-01-19
1997-11-11
Strecker, Gerard R.
Electricity: measuring and testing
Electrical speed measuring
Including speed-related frequency generator
32420712, 3242072, 32420721, 324 7648, 324 7655, 324 7682, 327 4, 327 40, G01P 3481, G01P 3489, G01R 2310, G01R 2500
Patent
active
056868359
ABSTRACT:
A magnetic detection device including at least one oscillator circuit having a magnetoresistance element which converts a change of magnetism detected into a digital signal and a comparator for comparing the digitalized oscillating frequency of the oscillator circuit with another digitalized oscillating frequency generated from another oscillating circuit by taking a ratio thereof or by detecting a phase difference between the pulse signals. Utilizing the magnetic detection device, the amount of change of magnetism can be stably detected with a high accuracy within a wide range of ambient usage temperatures. The physical quantity detection device includes a magnetic detection device which can detect any physical quantity with a high accuracy.
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Hattori Tadashi
Hoshino Kouichi
Ohtsuka Yoshinori
Watanabe Takamoto
Nippon Soken Inc.
Nippondenso Co., Ltd
Strecker Gerard R.
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