输入阻抗是指一个电路输入端的等效阻抗。输出阻抗就是一个信号源的内阻。阻抗匹配是指信号源或者传输线跟负载之间的一种合适的搭配方式。今天晚上7点我们将在抖音与B站直播Input impedance refers to the equivalent impedance at the input end of a circuit. The output impedance is the internal resistance of a signal source. Impedance matching refers to a suitable matching method between a signal source or transmission line and a load.