Patent ID: 6032109
Filing Date: 2000-02-29
Classification: G01D

Abstract:
A smart sensor module for compensation of sensor-to-sensor and temperature-induced errors in the analog output of a sensor comprisinga temperature sensor providing an electrical output related to the temperature of the sensor;fine gain and offset correction storage for storing fine gain and offset corrections for a plurality of different temperatures and, responsive to said temperature sensor output, for providing a fine gain correction output and a fine offset correction output;coarse gain and offset correction storage for storing coarse gain and offset corrections and providing a coarse gain correction output and a coarse offset correction output;an analog amplifier, having a DC offset responsive to said coarse and fine offset correction outputs, for amplifying the analog sensor output and providing an amplified analog sensor output;a first low pass filter, having a filter gain responsive to said coarse gain correction output, for low pass filtering the amplified analog sensor output and providing a coarse gain corrected analog sensor output; anda second low pass filter, having a filter gain responsive to said fine gain correction output, for low pass filtering the coarse gain corrected analog sensor output and providing a fully conditioned analog sensor output.