Patent ID: 6598484
Filing Date: 2003-07-29
Classification: G01D,G01L,G01R

Abstract:
A physical quantity detection device comprising:a first sensing resistor having a first resistance varying in accordance with a first physical quantity relating to a detection physical quantity; a second sensing resistor having a second resistance varying in accordance with a second physical quantity relating to said detection physical quantity, respective first ends of said first and second sensing resistors being connected to a first voltage potential; a first current source for flowing a first constant current through said first sensing resistor, a first end of said first current source being connected to a second end of said first sensing resistor; a second current source for flowing a second constant current through said second sensing resistor, a first end of said second current source being connected to a second end of said second sensing resistor, second ends of said first and second current sources being connected to a second potential which is different from said first voltage potential; and outputting means for outputting a voltage difference signal indicative of said detection physical quantity between the second ends of said first and second sensing resistors.