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我用下图搭好电路,将5脚或6脚接到输入端电容出,为什么,不管怎么接8脚都没输出啊,有过使用经验的帮忙说说.我的要求是设定好一个频率,请其他电路产生的该频率接3脚,就有输出,频率不对就不输出.请高手说说啊 500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/83/2484541258259061.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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