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/57/1983881188994398.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">跪求几个关于三极管的问题
请问用作开关的三极管be短路,ce短路、开路,e与外接电阻开路会有什么后果,最好结合三极管的结构和用作开关管的工作原理说下原因,(有图更感谢了!我的要求太多了啊)谢谢!!!急!!!感谢每个帮我的人!!!下面的图是10A开关电源的原理图,我就是不懂三极管be短路,ce短路、开路,e与外接电阻开路对三极管有什么影响,只知道正常时如果开关电源过压或过流则三极管导通,3525的8脚电位变低,使3525不输出脉冲,唉,当年的模电课没认真学啊,后悔了.
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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/57/1983881188994398.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">