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针对临床监护系统的实时要求，本文介绍了我们用二片8253控制多路开关、采样保持器和模数转换器的方法，这样系统中CPU用于数据采集的时间仅为读入数据一项，从而使得高阶数字滤波等实时处理得以实现。文中给出了详细的线路图和操作步骤。
For clinical monitoring system of real-time requirements, this article describes the use of two 8253 we control multiplexer, sample and hold converter and analog-digital converter method, so that the system CPU for data acquisition time is only a read data, So that high-end digital filtering and other real-time processing can be achieved. The article gives a detailed circuit diagram and operation steps.