Circuit for generating a position in digital form
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United States of America Patent
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-
Dec 2, 1986
Grant Date -
N/A
app pub date -
Aug 10, 1984
filing date -
Aug 10, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A circuit for generating a position signal has a detector having a detecting coil whose inductance varies in accordance with the position of an object which generates a first pulse response signal relating to the inductance of the detecting coil in response to the pulse signal, another detector having a constant inductance coil which generates a second pulse response signal relating to the inductance of the constant inductance coil in response to the pulse signal, and a circuit for producing a digital signal showing the ratio of the inductances of the detecting coil and the constant inductance coil as position data in response to at least the first and the second pulse response signals. The position signal can be directly obtained in digital form and the change in the inductances due to temperature change can be canceled out to obtain position data with high accuracy.
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