Patent ID: 8550708

Claim:
A thermal resistor test apparatus for a thermal resistor comprising: a control device adapted to store a plurality of predetermined voltage values and output control signals according to the plurality of predetermined voltage values; a temperature processing circuit adapted to receive the control signals and output a pulse width modulation (PWM) signal according to the control signal; a voltage regulating circuit adapted to receive the PWM signal and output a first direct current (DC) voltage to heat the thermal resistor; a temperature detecting circuit adapted to detect temperature signals and current signals of the thermal resistor; a conversion circuit adapted to convert a voltage level of the temperature signals and current signals which is identified by the control device; wherein the control device is adapted to receive the temperature signals and current signals which have been converted from the temperature detecting circuit via the temperature processing circuit and the conversion circuit, and generate a resistance-temperature graph of the thermal resistor according to the temperature signals and the current signals; and a power supply circuit adapted to provide working voltages to the temperature detecting circuit, the temperature processing circuit and the voltage regulating circuit.