Novel temperature acquisition method for active thermal control using MOS-FET in GEO satellite

Temperature acquisition is generally used for active thermal control in satellite and is used to check the health of electronics unit. There are two kinds of method for temperature acquisition. The first one is using the thermistor, and the other is using temperature transducer with fixed resistor. But temperature transducer is not used for geo-stationary satellite because of the radiation criteria for Geo satellite and temperature transducer have to be used with protection cover in order to compensate the radiation criteria for GEO satellite. Therefore simple thermistor is generally used for temperature acquisition in GEO satellite. In this paper, I reviewed general temperature acquisition method used in present GEO, LEO satellite using thermistor and temperature transducer, and proposes novel method to acquire the temperature using thermistor with MOS-FET in order to remove the drawback of present method. Proposed method can reduce the cost and area for temperature acquisition circuit and remove a number of drawbacks for present thermistor acquisition method.