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通常数字信号芯片使用的时钟源, 都是从时钟信号通过逻辑门或触发器转换成方波形成内部时钟的, 所以正弦波信号只要波峰和波谷电压满足时钟信号要求, 都是可以的
此外, 普通有源晶振, 输出的也是方波 (至少我用到的都是方波)