Loading... <!--more--> <h1>MOS-N 场效应管 双向电平转换电路</h1> <h2>-- 适用于低频信号电平转换的简单应用</h2> <p><img src="http://img.blog.csdn.net/20151211161543400?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="enter image description here" style=""></p> <p><strong>如上图所示</strong>,是 MOS-N 场效应管 双向电平转换电路。</p> <p>双向传输原理:</p> <blockquote> <p>为了方便讲述,定义 3.3V 为 A 端,5.0V 为 B 端。</p> </blockquote> <hr /> <p>A端输出低电平时(0V) ,MOS管导通,B端输出是低电平(0V)</p> <p>A端输出高电平时(3.3V),MOS管截至,B端输出是高电平(5V)</p> <p>A端输出高阻时(OC) ,MOS管截至,B端输出是高电平(5V)</p> <hr /> <p>B端输出低电平时(0V) ,MOS管内的二极管导通,从而使MOS管导通,A端输出是低电平(0V)</p> <p>B端输出高电平时(5V) ,MOS管截至,A端输出是高电平(3.3V)</p> <p>B端输出高阻时(OC) ,MOS管截至,A端输出是高电平(3.3V)</p> <hr /> <p>优点:</p> <ul> <li><p>适用于低频信号电平转换,价格低廉。</p></li> <li><p>导通后,压降比三极管小。</p></li> <li><p>正反向双向导通,相当于机械开关。</p></li> <li><p>电压型驱动,当然也需要一定的驱动电流,而且有的应用也许比三极管大。</p></li> </ul> Last modification:March 8, 2018 © Allow specification reprint Like 0 If you think my article is useful to you, please feel free to appreciate