Patent ID: 6507202
Filing Date: 2003-01-14
Classification: G01L

Abstract:
A sensed-pressure-data converter comprising:a pressure sensitive resistance element comprising: two insulating substrates disposed face to face; and a pressure sensitive conductor interposed between said insulating substrates, for varying a resistance thereof according to a load applied from an outside of said insulating substrates; a controller for detecting an electric characteristic of said pressure sensitive resistance element, converting the electric characteristic into a desired electric characteristic signal, and issuing a desired electric characteristic signal, comprising: an A/D converter receiving a signal from said pressure sensitive resistance element a memory preliminarily storing a compensation value determined based on an error signal between the electric characteristic of said pressure sensitive resistance element and a reference electric characteristic; and a D/A converter compensating a signal from said A/D converter based on the electric characteristic of said pressure sensitive resistance element due to a resistance change of said pressure sensitive resistance element based on the compensation value stored in said memory and issuing the compensated signal; an adjustment value input terminal for inputting the error signal into an input terminal of said A/D converter; and an error amplifier for receiving an output of said D/A converter and a reference value and for outputting the error signal to said adjustment value input terminal.