Demodulator circuit for determining position, velocity and acceleration of displacement sensor independent of frequency or amplitude changes in sensor excitation signal
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United States of America Patent
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Aug 26, 1997
Grant Date -
N/A
app pub date -
Sep 22, 1995
filing date -
Sep 22, 1995
priority date (Note) -
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Abstract
To allow a displacement sensor to operate independently of changes in the excitation signal to the transducer, a demodulating circuit is provided wherein comparison is made between the excitation signal and a reference signal, the comparison is used to adjust an output generating circuit which generates the output from the transducer. Advantageously, the output generating circuit can provide movement information from output of the transducer which include position, velocity and acceleration.
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