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/31/1120178181.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
小弟刚接触门电路,不懂原理,在这请懂得人指点一下:
1.当A.B都输入高电平+6V时,V1和V2谁导通?Y的电平是高还是低?电流怎么流?
2.当A.B中有一端输入你低电平-6V时,V1和V2谁导通?Y的电平是高还是低?电流怎么流?
