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/53/1090901179235670.bmp');}" onmousewheel="return imgzoom(this);">用3842做的占空比可调的方波发生器----10只元件
最近做一传真机电源,测试高压部分要用有同占空比的信号来测试,所以用3842做了一个,因时间有限做的比较粗糙,现发上来大家看看,能不能再完善一下其中频率由Rt、Ct设定,VR2调节占空比,VR3调节输出幅度.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/53/1090901179235670.bmp');}" onmousewheel="return imgzoom(this);">
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/53/1090901179235670.bmp');}" onmousewheel="return imgzoom(this);">