电子元器件场效应管特性简介

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                    <section><section powered-by="gulangu"><section><p><img src="image/20201019/81217b567fbeee9a1c7c4f6aead420fd_1.gif" /></p></section></section><section powered-by="gulangu"><section><section><p>场效应管的基本知识</p></section> <p><img src="image/20201019/ee96014fac9f42d2162161229eb48886_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;场效应管是一种通过电场效应来控制电流流动的半导体器件，属于电压控制器件。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;场效应管分为结型场效应管和绝缘栅型场效应管。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;结型场效应管（砷化镓金属-半导体场效应管）：由于漏极源极结构上对称，一般情况下可以相互使用。</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/a7e18c89aa3f5fd12fa5089fe4b3fe3e_3.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/f9da25a641b734d847bdeab85505fa12_4.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;绝缘栅型场效应管（金属-氧化物-半导体场效应管）</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/463df17ce45155ab6d2541b7df7d36d7_5.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/3a8d26380c7b81b669d265ea57f9de82_6.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/a2bdd4ed6f8dcd6bcc2ec72f087ecc0b_7.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/b7f2432fdbe65355e48fe0b7f1d57402_8.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>场效应管的基本参数</p></section> <p><img src="image/20201019/ee96014fac9f42d2162161229eb48886_2.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>1、夹断电压U<span>GS</span>或U<span>P</span></p></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;夹断电压是结型场效应管及耗尽型绝缘栅型场效应管特有的参数，就是让场效应管已有的导电沟道夹断而不能导电的电压值，当UGS=UGS(OFF)时，漏极电流为零，场效应管处于截止状态。</p><p>2、开启电压Ugs（th）</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 开启电压是增强型场效应管特有的参数，是让D极与S极之间形成导电沟道的一个电压值。</p><p>3、饱和电流I<span>DSS</span></p><p><span>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span>是结型场效应管及耗尽型绝缘栅型场效应管特有的参数，在U<span>DS</span>=0条件下，漏极与源极之间所加电压大于夹断电压时的沟道电流称为饱和电流。</span></span></p></section></section></section><section powered-by="gulangu"><section><section><p>场效应管的工作原理</p></section> <p><img src="image/20201019/6fed77d46ea9d051b8b76eb629b9568f_10.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp;场效应管的转移特性：栅极电压U<span>GS</span>对漏极电流I<span>D</span>的控制作用称为转移特性。</p><p>&nbsp; &nbsp; &nbsp; &nbsp;场效应管的输出特性：漏极电压U<span>DS</span>与漏极电流I<span>D</span>的关系称为输出特性。</p><p>&nbsp; &nbsp; &nbsp; &nbsp;1、N沟道结型、绝缘栅（耗尽型）</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 转移特性如下：当U<span>DS</span>=0就有导电沟道，当U<span>GS</span>负压≧U<span>GS</span>（off）时，导电沟道关闭，i<span>D</span>=0。</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/26b9d6403b98aa970fa67d492ba2616a_11.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/c609b44f3e838d374fde8bfb4ecfe5e2_12.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2、P沟道结型、绝缘栅（耗尽型）</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;转移特性如下：当U<span>DS</span>=0就有导电沟道，当U<span>GS</span>正压≧U<span>GS</span>（off）时，导电沟道关闭，i<span>D</span>=0。</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/3c860b694ba52a5ab5459cccdbba4da2_13.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/f75a54c15a2a5478ac7246406ffed301_14.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3、N沟道（增强型）<br  /></p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 转移特性如下：当U<span>GS</span>=0没有导电沟道，当U<span>GS</span>正压≧U<span>GS</span>（th）时，导电沟道开启，有I<span>D</span>电流。</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/61bcaa59a50b87589c58c10a4ad8e157_15.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/681d6b0325330c04e9f57a83638cfb80_16.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4、P沟道（增强型）</p></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 转移特性如下：当U<span>GS</span>=0没有导电沟道，当U<span>GS</span>负压≧U<span>GS</span>（th）时，导电沟道开启，有I<span>D</span>电流。</p></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/e6f0f0006e358065b94a2e766aa1364d_17.jpg" /></p></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/fa7f1732bad1e877a0c806655f6d404e_18.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>场效应管的分类</p></section> <p><img src="image/20201019/6fed77d46ea9d051b8b76eb629b9568f_10.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/f4b5b5bd1ce147caf322639eb48f2b73_20.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p>场效应管的供电特性</p></section> <p><img src="image/20201019/6fed77d46ea9d051b8b76eb629b9568f_10.png" /></p> <section></section></section></section><section powered-by="gulangu"><section><p><img src="image/20201019/2cbcb68b4824a9e3fbd6bc2f5f47cb74_22.jpg" /></p></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p>欢</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>迎</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>注</p></section></section></section> </section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><p><img src="image/20201019/444452eb93f03e88528fc87781e08556_23.jpg" /></p></section></section> </section><section> <section powered-by="gulangu"><section><section> </section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section> </section></section></section></section>