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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/37/1136127991.gif');}" onmousewheel="return imgzoom(this);">
上图的滤波电路,其共模电感是怎样的结构?
绕线的方向?
接线的同名端?
盼高手指点!