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在以微处理器为核心的仪表中，为了充分发挥CPU的控制和运算能力，往往设计得能分时处理多路输入信号。常用的规模有16路单端输入和8路双端输入两种方式。这时一般可用CD4051或CD4067之类的模拟电子开关来进行通道切换选择。但在某些应用场合中，对检测巡回速度要求不高，却希
In the microprocessor as the core of the instrument, in order to give full play to the CPU control and computing power, often designed to time-division multiple input signal processing. Commonly used in the scale of 16 single-ended input and 8 double-ended input in two ways. At this time generally available analog CD4051 or CD4067 analog electronic switch to switch the channel selection. However, in some applications, the testing speed is not demanding, but hope