请问4引脚有源晶振的输出是方波吗?如果是方波的话输出电压的幅值应该是多少,与有源晶振的供电电压相同?我看见一个电路,DSP的时钟输入引脚要求输入的晶振电平最大为2.8V,但电路外接的有源晶振电源为5V,这电路正确吗?
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