最近在做一款200M的过零比较器，输入100mv~5vpp的正弦波，输出相同频率的方波，但是输出结果却是2mvpp的直流信号，从AQ处输出3.2v，^AQ输出2.8v,一直在查找原理图中的错误，恳求各位指点！测试时已将vee和gnd相接，vcci和vcco连接到5v。
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