在对各种非电量的检测中 ,A/D转换器是将被检测或控制的模拟量转换为数字量 ,才能送入计算机或其它系统中去进行必要的运算处理、控制等。实际应用中 ,外接积分电容的漏电阻造成MC144 33的转换精度下降 ,且使转换误差呈非线性。本文通过分析 ,推导了简化的补偿电阻的计算式 ,同时介绍了一种简单实用的补偿方法。 In a variety of non-power detection, A / D converter is detected or controlled analog to digital conversion, can be sent to the computer or other systems to carry out the necessary computing, control and so on. In practice, the leakage resistance of the external integration capacitor causes the conversion accuracy of the MC14433 to decline, and the conversion error to be nonlinear. In this paper, a simplified calculation formula of compensation resistance is deduced, and a simple and practical compensation method is introduced.