System for externally referenced ratiometric signal processing
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United States of America Patent
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Mar 19, 2002
Grant Date -
N/A
app pub date -
Feb 4, 2000
filing date -
Feb 4, 2000
priority date (Note) -
Expired
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Abstract
A device for externally referenced ratiometric signal processing includes an external signal source and a control module. The external signal source has an external voltage reference supply for generating an external reference voltage and a gain & offset circuit for generating a signal voltage. The value of the signal voltage is varies so that the ratio of the signal voltage to the external reference voltage is proportional to the position of a transducer. The control module receives the signal voltage and the external voltage reference. The control module includes an analog to digital converter that converts the signal voltage to a digital signal. The digital signal is proportional to the ratio of the signal voltage to the external reference voltage. A microprocessor may then use the digital signal to infer the position of the transducer.
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