喔,真的有可能是输出负电压啊,板子我看错了,其实是这样的,只是我还是不太懂这个4069的应用原理,能详细说说嘛?[img]file:///C:\Documents and Settings\Administrator\Application Data\Tencent\Users\79853077\QQ\WinTemp\RichOle\SRI0[G~RK23}~254LCNZDZM.jpg[/img][img]file:///C:\Documents and Settings\Administrator\Application Data\Tencent\Users\79853077\QQ\WinTemp\RichOle\SRI0[G~RK23}~254LCNZDZM.jpg[/img]