Patent ID: 6329825
Filing Date: 2001-12-11
Classification: G01D,G01L

Abstract:
A sensing apparatus comprising:a sensing bridge circuit including a plurality of resistance elements for generating a sensor signal having a voltage level responsive to a detected physical quantity;a temperature detecting bridge circuit including at least one temperature-sensing resistance element having a predetermined temperature coefficient and at least one reference resistance element having a temperature coefficient equal to or nearly equal to 0 for generating a temperature signal having a voltage level responsive to a temperature of said sensing bridge circuit, said temperature detecting bridge circuit further including at least one trimming resistor to adjust a variation width of said temperature signal produced from the temperature detecting bridge circuit;a signal selecting circuit for selectively outputting said sensor signal and said temperature signal; andan amplification circuit for amplifying the signals successively outputted from said signal selecting circuit;wherein a variation width of said sensor signal in a measuring range of the detected physical quantity of said sensing bridge circuit is substantially equalized in advance with the variation width of said temperature signal in a temperature measuring range of said temperature detecting bridge circuit by means of said at least one trimming resistor.