Abstract
본 논문에서는 온도 센서와 OP-AMP를 이용하여 X-밴드용 전압제어 발진기를 위한 온도 보상 회로를 구현하였다. 온도 변화에 대해 선형적인 특성을 갖는 온도 센서의 출력 전압을 튜닝 전압에 더해서 전압제어 발진기에 인가함으로써 온도에 따른 주파수 이동을 보상할 수 있었다. -30~+<TEX>$60^{\circ}C$</TEX>의 온도 범위에서 9.95~10.05 GHz의 대역에 대해 온도 보상을 한 결과, 전체 대역폭에서 출력 주파수는 온도 보상 전 71~73 MHz가 변화했으나, 온도보상 후에는 6.6~4.4 MHz의 변화를 보였다. In this paper, temperature compensation circuit for the X-band voltage controlled oscillator(VCO) is presented by using the temperature sensor with the OP-AMP circuit. The frequency drifting by the temperature could be compensated by applying the tuning voltage which include the linearly changing output voltage of the temperature sensor. As a result, the frequency variation is reduced to 6.6~4.4 MHzfrom the 71~73 MHz variation with the compensation circuit over -30~+<TEX>$60^{\circ}C$</TEX> range, when VCO is operated in the frequency range of 9.95~10.05 GHz.
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