我们在做HMC307增益衰减的芯片发现9-16号角都是接通的，
而且我们输入信号，信号无输出，
芯片的数据手册上说，芯片的工作电压是-5V，我们在网上找到的资料里说是+5V供电，但是还是没有输出
我们用万用表测工作状态时的芯片各管脚发现还是导通de
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