Patent ID: 6033109
Filing Date: 2000-03-07
Classification: G01K

Abstract:
A device for measure a practical temperature by converting a voltage to a temperature value comprising:a thermistor and a division resistor connected in series, wherein one terminal of said thermistor is grounded, and one terminal of said division resistor is connected to a voltage source;an analog-to-digital converter for converting the voltage of said thermistor into digital output;a first storage device for storing a voltage-temperature cross-reference table;a second storage device for storing a temperature-increment table;a first multiplexer for decoding the higher bit portion of said digital output thereby selecting a corresponding temperature from said voltage-temperature cross-reference table as a rough temperature;a second multiplexer for decoding the higher bit portion of said digital output thereby selecting a corresponding temperature increment from said temperature-increment table as a temperature step;a multiplier for multiplying the lower bit portion of said digit output by said temperature step to obtain a fine temperature; andan adder for adding said fine temperature to said rough temperature to output a practical temperature value.