Inductive sensor with demodulator
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United States of America Patent
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Oct 4, 2016
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N/A
app pub date -
Oct 4, 2013
filing date -
Oct 5, 2012
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Abstract
A transconductor converts voltage on an inductive sensor to a proportional current using two “coupling” capacitors. Responsive to movement of an electrically conductive target from the null position a resonant current is formed between the two sensor coils. A single differential transistor pair switched by periodic drive signals commutes the net alternating current at the single input to direct current.
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