Patent ID: 6094920
Filing Date: 2000-08-01
Classification: G01K,G05D

Abstract:
A temperature control circuit comprising:a temperature detection circuit for detecting the temperature of an object and outputting a temperature detection voltage that corresponds to the detected temperature of the object;a first reference voltage generation circuit for generating a first reference voltage that corresponds to the upper limit of a predetermined suitable temperature range for the object;a second reference voltage generation circuit for generating a second reference voltage that corresponds to the lower limit of the suitable temperature range for the object;a first temperature comparison circuit which is supplied with the temperature detection voltage from the temperature detection circuit and the first reference voltage from the first reference voltage generation circuit and executes comparison between the two voltages;a second temperature comparison circuit which is supplied with the temperature detection voltage from the temperature detection circuit and the second reference voltage from the second reference voltage generation circuit and executes comparison between the two voltages;a temperature control signal generation circuit which is supplied with output signals of the first and second temperature comparison circuits which represent the results of the comparison and generates a temperature control signal for controlling ON/OFF of a power supply of a cooler based on the results of the comparison; anda temperature control circuit for setting ON/OFF the power supply of the cooler according to the temperature control signal.