我想用VCA810做一个增益可调的放大器。按如图画的PCB,可是没有输出。于是我把芯片拆了下来,重新用洞洞板搭了一下,用洞洞板搭的时候没有加50欧的电阻,可是依然没有输出,求解答,还有,有没有可能芯片在我拆的时候已经被烧掉了
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