Inductive joystick and signal processing circuit therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Mar 28, 2000
Grant Date -
N/A
app pub date -
Sep 26, 1997
filing date -
Mar 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inductive joystick includes a movable actuator which carries an element of electrically conductive low magnetic permeability material (e.g., copper or aluminum), such that movement of the actuator differentially affects the coupling between a primary coil and a pair of secondary coils which are encircled by the primary coil. The arrangement provides a desirable output characteristic, in which the minimum output of each secondary coil is preferably greater than the maximum difference between the outputs of the two secondary coils, useful for detecting component failure. The secondary coils are preferably connected in a processing circuit which rectifies the outputs of the two coils before combining them to form a resultant 'difference' output.
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