Magnetic field alternation detecting apparatus

Details Magnetic field alternation detecting apparatus Magnetic field alternation detecting apparatus

1993-06-17

1996-01-09

Wieder, Kenneth A.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324174, 32420715, 32420716, 32420724, 324166, 324190, 327100, 327102, 327108, 327170, G01P 348

Patent

active

054831563

ABSTRACT:
A magnetic field alternation detecting apparatus includes a magnetic member sensor enclosed in a case and having a core (i.e., a yoke) to which a magnet is attached and around which a coil is wound. The magnetic member sensor obtains as an electromotive voltage a change in magnetic flux linking the coil on the basis of a magnetic field distribution disturbed by an approaching magnetic member present near the case from a pair of output terminals of the coil. An analog-to-digital converter is connected to the output terminals of the coil using at least one control terminal of a transistor such as a bipolar transistor or an enhancement operation field effect transistor. A main current terminal of the transistor is connected to a pair of output terminals.

REFERENCES:
patent: 3356082 (1967-12-01), Jukes
patent: 5019774 (1991-05-01), Rosenberg
patent: 5101155 (1992-03-01), Oehler et al.

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