Electricity: measuring and testing – Magnetic – Displacement
Patent
1981-11-24
1989-08-01
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Displacement
307309, 338 32R, 357 27, G01B 714, H01L 4308, H01L 2702
Patent
active
048536326
ABSTRACT:
An apparatus for magnetically detecting a position of a movable magnetic body includes a three-terminal magnetic field-intensity sensing structure formed by a pair of magneto-resistors. The magnetic field-intensity sensing structure is disposed opposite to a magnetic body arranged for movement relative thereto in a magnetic field and generates a first electrical signal of sinusoidal waveform in response to a change in the intensity of the magnetic field due to the relative movement of the magnetic body. This first electrical signal appears from the apparatus as a second electrical signal of rectangular waveform or of sinusoidal waveform having an amplified amplitude. Components of the circuit for shaping the waveform of or amplifying the amplitude of the first electrical signal are integrally mounted together with the magneto-resistors on a substrate. Preferably, the shaping or amplifying circuit is in the form of a hybrid integrated circuit formed on the substrate.
REFERENCES:
patent: 3800193 (1974-03-01), Ashar et al.
patent: 3816766 (1970-06-01), Anselmo et al.
patent: 3846697 (1974-11-01), Cila
patent: 3916428 (1975-10-01), Kuninobu et al.
Nagano Yoosuke
Seki Toshio
Sekizawa Sadao
Eisenzopf Reinhard J.
Hitachi , Ltd.
Snow W.
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