Apparatus and method for a temperature compensation of a catheter tip pressure transducer
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United States of America Patent
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Sep 15, 1992
Grant Date -
N/A
app pub date -
Oct 25, 1990
filing date -
Oct 25, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for compensating for temperature dependent offset and fixed offset in a resistance bridge is disclosed. The apparatus comprises a resistance bridge, a compensation network and an instrumentation amplifier. The uncompensated output of the bridge is applied to the input of the instrumentation amplifier. The output of the compensation network is fed into the instrumentation amplifier to compensate for the temperature and offset dependent components of the bridge output. The output and resistance of the bridge are measured under conditions of constant pressure and temperature for different temperatures and pressures and the temperature coefficient of resistance, temperature coefficient of offset and temperature coefficient of sensitivity are calculated. These coefficients are used to select compensation network resistors.
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