Active sensor circuit with one or more T-network pairs
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United States of America Patent
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Nov 7, 2006
Issued Date -
N/A
app pub date -
Feb 9, 2005
filing date -
Mar 11, 2004
priority date (Note) -
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Abstract
A sensor circuit is provided that includes a first T-network including a first impedance serially connected to a second impedance at a first junction and a first variable resistance sensor element connected at a first end to the first junction and at a second end to ground. The sensor circuit also includes a second T-network including a third impedance serially connected to a fourth impedance at a third junction and a second variable resistance sensor element having first and second sensor element ends. The first sensor element end is connected to the third junction and the fourth impedance is connected to the second junction. The sensor circuit further includes a constant voltage source connected to the third impedance and to ground. The second end of the second variable resistance sensor element is connected to a fourth junction intermediate the constant voltage source and ground.
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