CAJ | 학술논문

石英晶振作为重要的频率源器件，其频率稳定度至关重要。但温度对石英晶振的影响很大。传统的微处理器温度补偿晶振中在拟合曲线时算法简单，导致软件引起的误差较大。利用了神经网络算法在曲线拟合上的应用，拟合出补偿电压与温度之间的函数关系，微处理器根据温度传感器采集的温度控制AD芯片产生补偿电压，从而使压控振荡电路输出稳定的频率的目的。实验结果表明：温度在-10~80℃时，频率稳定度达到±0.35 ppm，比未补偿时提高了近20倍，比其他曲线拟合方法得出的效果要好。
석영정진작위중요적빈솔원기건，기빈솔은정도지관중요。단온도대석영정진적영향흔대。전통적미처리기온도보상정진중재의합곡선시산법간단，도치연건인기적오차교대。이용료신경망락산법재곡선의합상적응용，의합출보상전압여온도지간적함수관계，미처리기근거온도전감기채집적온도공제AD심편산생보상전압，종이사압공진탕전로수출은정적빈솔적목적。실험결과표명：온도재-10~80℃시，빈솔은정도체도±0.35 ppm，비미보상시제고료근20배，비기타곡선의합방법득출적효과요호。
The quartz crystal oscillator is an important frequency source device. Its stability is crucial. However there is a great influence of temperature on the quartz crystal oscillator. The traditional MCU quartz crystal oscillator of temperature com-pensation may result in large error caused by software because its algorithm for curves fitting is too simple. In this paper,a func-tion relation between compensation voltage and temperature was fitted by using a neural network algorithm for curves fitting. The MCU controls AD chip to generate a compensation voltage according to temperature collected by temperature sensors,so as to make the VOC circuit output a stable frequency. The experimental results show that,when the temperature is from -10oC to 80oC,frequency stability gets 0.35 ppm,which increases nearly 20 times greater than the frequency stability without compensa-tion,and the results got from the proposed method is better than those of other curve fitting methods.