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펠티어 소자를 사용한 Low Drift Flux Meter의 기초연구
김철한,허진,신광호,사공건,Kim, Chul-Han,Heo, Jin,Shin, kwang-Ho,Sa-Gong, Geon 한국전기전자재료학회 2001 전기전자재료학회논문지 Vol.14 No.11
Fluxmeter is a measuring instrument the magnetic flux intensity by means of an integration of the voltage induced to a search coil to unit time. It also is required to a precise integrator since the voltage induced to a search coil has a differential value of the flux ${\Phi}$ to unit time. In this study, a bias current which is a main problem of the integrator in a drift troublesome depending on the temperature of a FET is investigated. We have confirmed that the temperature dependence of both the bias current of a integrator using the FET and the reversal saturated current of the minor carrier in a P-N junction of a semiconductor were the same. The property of a commercial integrator goes rapidly down with increasing temperature. The bias current of a FET is increased twice as much with 10$^{\circ}C$ increment. As a result, the low drift integrator could be developed by setting the lower temperature up with a pottier device.