Rotatable magnetic field-sensing solid-state switch apparatus

Details Rotatable magnetic field-sensing solid-state switch apparatus Rotatable magnetic field-sensing solid-state switch apparatus

1981-01-19

1983-11-15

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Displacement

338 32H, G01B 714, H01L 4308

Patent

active

044158564

ABSTRACT:
A manually-operated rotary switch apparatus utilizes a rotatable magnet for establishing the dual-polarity outputs of each of a pair of magnetic field sensors, oriented substantially perpendicular to each other. The dual-polarity voltages are processed to approximate the arc tangent of the angle of the knob-rotatable magnetic member, with respect to a reference orientation, to provide digital data output related to the switch position of the manually-rotatable knob.

REFERENCES:
patent: 3988710 (1976-10-01), Sidor et al.
patent: 4054860 (1977-10-01), Henderson et al.
patent: 4283679 (1981-11-01), Ito et al.

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