Patent ID: 6249753
Filing Date: 2001-06-19
Classification: G01D

Abstract:
A sensor system comprising:a sensor for sensing an input between a first, minimum sensor input value and a second, maximum sensor input value, said sensor generating a sensor output signal relative to said sensor input value, said sensor subject to offset and gain errors;a microprocessor having first and second outputs generating respective first and second microprocessor signals;a signal conditioner coupled between said sensor and said microprocessor, said signal conditioner generating a first signal conditioner signal when said sensor input value equals said minimum sensor input value and generating a second signal conditioner signal when said sensor input value equals said maximum sensor input value, said signal conditioner including means for minimizing said sensor offset error and means for minimizing said sensor gain error, wherein said offset minimizing means includes a summing circuit for summing said sensor output signal and said first microprocessor signal to generate a summed signal substantially equal to zero when said sensor input value is at said minimum sensor value, and said gain error minimizing means includes a variable gain amplifier responsive to said summed signal and said second microprocessor signal for generating a signal substantially equal to said maximum sensor value when said sensor input value is at said maximum sensor value.