{"id":478,"date":"2026-03-10T15:11:05","date_gmt":"2026-03-10T07:11:05","guid":{"rendered":"https:\/\/ezblog.cn\/?p=478"},"modified":"2026-10-08T23:48:39","modified_gmt":"2026-10-08T15:48:39","slug":"%e6%ba%90%e6%9e%81%e8%b7%9f%e9%9a%8f%e5%99%a8%e4%b8%ba%e4%bb%80%e4%b9%88%e8%b7%9f%e4%b8%8d%e5%87%86%ef%bc%9a%e4%bd%93%e6%95%88%e5%ba%94%e4%b8%8e%e9%a9%b1%e5%8a%a8%e8%83%bd%e5%8a%9b","status":"publish","type":"post","link":"https:\/\/ezblog.cn\/?p=478","title":{"rendered":"\u6e90\u6781\u8ddf\u968f\u5668\u4e3a\u4ec0\u4e48\u8ddf\u4e0d\u51c6\uff1a\u4f53\u6548\u5e94\u4e0e\u9a71\u52a8\u80fd\u529b"},"content":{"rendered":"<p>\u6e90\u6781\u8ddf\u968f\u5668\uff08Source Follower\uff09\u4e3b\u8981\u7528\u6765\u964d\u4f4e\u8f93\u51fa\u963b\u6297\u3002\u4f53\u6548\u5e94\uff08Body Effect\uff09\u3001\u6709\u9650\u7684\u8f93\u51fa\u7535\u963b\uff08Output Resistance\uff09\u548c\u8d1f\u8f7d\u7535\u6d41\uff0c\u90fd\u4f1a\u5f71\u54cd\u8f93\u51fa\u5bf9\u8f93\u5165\u7684\u8ddf\u968f\u3002<\/p>\n<h2>\u4f53\u6548\u5e94\u5982\u4f55\u5f71\u54cd\u8ddf\u968f<\/h2>\n<p>\u4ee5 NMOS \u8ddf\u968f\u5668\u4e3a\u4f8b\uff1a\u6f0f\u6781\u63a5\u7535\u6e90\uff0c\u4f53\u7aef\uff08Body\uff09\u7535\u538b\u56fa\u5b9a\u3002\u6e90\u6781\u7535\u538b\u4e0a\u5347\u65f6\uff0c\u6e90\u4f53\u7535\u538b V<sub>SB<\/sub> \u589e\u5927\uff0c\u9608\u503c\u7535\u538b\u968f\u4e4b\u5347\u9ad8\uff0c\u62b5\u6d88\u4e86\u4e00\u90e8\u5206\u8f93\u5165\u4fe1\u53f7\u5e26\u6765\u7684\u6f0f\u7535\u6d41\u589e\u957f\u3002<\/p>\n<p>\u6805\u6781\u901a\u8fc7\u8de8\u5bfc\uff08Transconductance\uff09g<sub>m<\/sub> \u63a7\u5236\u7535\u6d41\uff1b\u4f53\u7aef\u5219\u8d21\u732e\u4f53\u8de8\u5bfc\uff08Body Transconductance\uff09g<sub>mb<\/sub>\u3002\u53ea\u8981\u6e90\u6781\u76f8\u5bf9\u4f53\u7aef\u6709\u5c0f\u4fe1\u53f7\u6446\u52a8\uff0c\u4e24\u9879\u90fd\u8981\u8003\u8651\u3002<\/p>\n<p>\u9759\u6001 V<sub>SB<\/sub> \u4e3a\u96f6\uff0c\u5e76\u4e0d\u4ee3\u8868\u5c0f\u4fe1\u53f7\u4f53\u6548\u5e94\u6d88\u5931\u3002\u5173\u952e\u662f\u4f53\u7aef\u662f\u5426\u968f\u6e90\u6781\u4e00\u8d77\u53d8\u5316\u3002\u4f53\u6e90\u6709\u6548\u77ed\u63a5\u53ef\u4f7f\u5c0f\u4fe1\u53f7\u4f53\u6e90\u7535\u538b\u4e3a\u96f6\uff0c\u4f46\u80fd\u5426\u8fd9\u6837\u8fde\u63a5\uff0c\u53d6\u51b3\u4e8e\u5de5\u827a\u548c\u9631\u9694\u79bb\uff08Well Isolation\uff09\u3002<\/p>\n<h2>\u589e\u76ca\u4e3a\u4ec0\u4e48\u5c0f\u4e8e 1<\/h2>\n<p>\u6f0f\u7aef\u548c\u4f53\u7aef\u5904\u4e8e\u4ea4\u6d41\u5730\uff08AC Ground\uff09\u3001\u8f93\u5165\u7aef\u7531\u5c0f\u4fe1\u53f7\u9a71\u52a8\u65f6\uff0c\u4f4e\u9891\u7535\u538b\u589e\u76ca\u8fd1\u4f3c\u4e3a\uff1a<\/p>\n<div class=\"formula\">\n<math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><msub><mi>A<\/mi><mi>v<\/mi><\/msub><mo>=<\/mo><mfrac><msub><mi>g<\/mi><mi>m<\/mi><\/msub><mrow><msub><mi>g<\/mi><mi>m<\/mi><\/msub><mo>+<\/mo><msub><mi>g<\/mi><mrow><mi>m<\/mi><mi>b<\/mi><\/mrow><\/msub><mo>+<\/mo><msub><mi>G<\/mi><mi>L<\/mi><\/msub><\/mrow><\/mfrac><\/math><\/div>\n<p>G<sub>L<\/sub> \u5305\u542b\u8ddf\u968f\u5668\u81ea\u8eab\u7684\u8f93\u51fa\u7535\u5bfc\uff08Output Conductance\uff09\u3001\u504f\u7f6e\u7535\u6d41\u6e90\u7684\u8f93\u51fa\u7535\u5bfc\u548c\u5916\u63a5\u7535\u963b\u8d1f\u8f7d\u7684\u7535\u5bfc\u3002<\/p>\n<p>\u5373\u4f7f G<sub>L<\/sub> \u53ef\u5ffd\u7565\uff0c\u53ea\u8981 g<sub>mb<\/sub> \u5b58\u5728\uff0c\u589e\u76ca\u5c31\u5c0f\u4e8e 1\u3002\u589e\u5927\u504f\u7f6e\u7535\u6d41\u672a\u5fc5\u80fd\u6d88\u9664\u8fd9\u9879\u8bef\u5dee\uff0c\u56e0\u4e3a g<sub>m<\/sub> \u548c g<sub>mb<\/sub> \u5f80\u5f80\u540c\u65f6\u589e\u5927\u3002\u63d0\u9ad8\u504f\u7f6e\u7535\u6d41\u6e90\u7684\u8f93\u51fa\u7535\u963b\u80fd\u51cf\u5c0f\u8d1f\u8f7d\u5f71\u54cd\uff0c\u4f46\u4e0d\u80fd\u6d88\u9664\u4f53\u6548\u5e94\u3002<\/p>\n<h2>\u8f93\u51fa\u7535\u963b\u4f4e\uff0c\u4e0d\u7b49\u4e8e\u8ddf\u5f97\u51c6<\/h2>\n<p>\u6c42\u8f93\u51fa\u8282\u70b9\u7b49\u6548\u7535\u963b\u65f6\uff0c\u8f93\u5165\u3001\u6f0f\u7aef\u548c\u4f53\u7aef\u5747\u4ea4\u6d41\u63a5\u5730\uff1a<\/p>\n<div class=\"formula\">\n<math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><msub><mi>R<\/mi><mrow><mi>o<\/mi><mi>u<\/mi><mi>t<\/mi><\/mrow><\/msub><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><msub><mi>g<\/mi><mi>m<\/mi><\/msub><mo>+<\/mo><msub><mi>g<\/mi><mrow><mi>m<\/mi><mi>b<\/mi><\/mrow><\/msub><mo>+<\/mo><msub><mi>G<\/mi><mi>L<\/mi><\/msub><\/mrow><\/mfrac><\/math><\/div>\n<p>\u4f53\u6548\u5e94\u540c\u65f6\u964d\u4f4e\u7535\u538b\u589e\u76ca\u548c\u7b49\u6548\u7535\u963b\u3002\u8fd9\u91cc\u7684 R<sub>out<\/sub> \u5305\u542b\u5916\u63a5\u8d1f\u8f7d\uff0c\u4e0d\u80fd\u76f4\u63a5\u89c6\u4e3a\u7a7a\u8f7d\u7f13\u51b2\u5668\u81ea\u8eab\u7684\u8f93\u51fa\u7535\u963b\u3002<\/p>\n<p>\u82e5\u8d1f\u8f7d\u7535\u5bb9 C<sub>L<\/sub> \u5360\u4e3b\u5bfc\uff0c\u4e14\u6805\u6781\u9a71\u52a8\u963b\u6297\u8db3\u591f\u4f4e\uff0c\u8f93\u51fa\u6781\u70b9\uff08Output Pole\uff09\u8fd1\u4f3c\u4e3a\uff1a<\/p>\n<div class=\"formula\">\n<math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><msub><mi>f<\/mi><mi>p<\/mi><\/msub><mo>=<\/mo><mfrac><mn>1<\/mn><mrow><mn>2<\/mn><mi>\u03c0<\/mi><msub><mi>R<\/mi><mrow><mi>o<\/mi><mi>u<\/mi><mi>t<\/mi><\/mrow><\/msub><msub><mi>C<\/mi><mi>L<\/mi><\/msub><\/mrow><\/mfrac><\/math><\/div>\n<p>\u8fd9\u53ea\u662f\u5355\u6781\u70b9\u4f30\u7b97\u3002\u6805\u6781\u9a71\u52a8\u963b\u6297\u548c\u5bc4\u751f\u7535\u5bb9\u53ef\u80fd\u5f15\u5165\u5176\u4ed6\u6781\u70b9\u3001\u96f6\u70b9\u3002\u5927\u4fe1\u53f7\u5145\u653e\u7535\u8fd8\u53d7\u53ef\u7528\u7535\u6d41\u9650\u5236\uff0c\u5c0f\u4fe1\u53f7\u5e26\u5bbd\u8db3\u591f\uff0c\u4e0d\u4ee3\u8868\u5927\u6446\u5e45\u9636\u8dc3\u7684\u5efa\u7acb\u65f6\u95f4\uff08Settling Time\uff09\u4e5f\u8db3\u591f\u77ed\u3002<\/p>\n<h2>\u5148\u67e5\u5de5\u4f5c\u8303\u56f4\uff0c\u518d\u4f18\u5316\u901f\u5ea6<\/h2>\n<p>\u5148\u626b\u63cf\u8f93\u5165\u8303\u56f4\uff0c\u68c0\u67e5\u8ddf\u968f\u5668\u548c\u504f\u7f6e\u7535\u6d41\u6e90\u662f\u5426\u7559\u6709\u8db3\u591f\u7684\u6f0f\u6e90\u7535\u538b\u3002\u63a5\u8fd1\u6446\u5e45\u4e0a\u4e0b\u9650\u65f6\uff0c\u4e0a\u8ff0\u5c0f\u4fe1\u53f7\u4f30\u7b97\u53ef\u80fd\u4e0d\u518d\u9002\u7528\u3002<\/p>\n<p>\u5b9e\u9645\u8bbe\u8ba1\u8981\u4e00\u8d77\u68c0\u67e5\u589e\u76ca\u3001\u8f93\u51fa\u6446\u5e45\u3001\u8d1f\u8f7d\u7535\u6d41\u548c\u5efa\u7acb\u65f6\u95f4\u3002\u52a0\u5927\u7535\u6d41\u80fd\u6539\u5584\u9a71\u52a8\uff0c\u4f46\u4e0d\u80fd\u66ff\u4ee3\u8db3\u591f\u7684\u7535\u538b\u88d5\u91cf\uff08Voltage Headroom\uff09\u548c\u5408\u9002\u7684\u7535\u8def\u62d3\u6251\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6e90\u6781\u8ddf\u968f\u5668\uff08Source Follower\uff09\u4e3b\u8981\u7528\u6765\u964d\u4f4e\u8f93\u51fa\u963b\u6297\u3002\u4f53\u6548\u5e94\uff08Body Effect\uff09\u3001\u6709\u9650\u7684\u8f93\u51fa\u7535\u963b\uff08Output Resistance\uff09\u548c\u8d1f\u8f7d\u7535\u6d41\uff0c\u90fd\u4f1a\u5f71\u54cd\u8f93\u51fa\u5bf9\u8f93\u5165\u7684\u8ddf\u968f\u3002 \u4f53\u6548\u5e94\u5982&#8230; <a href=\"https:\/\/ezblog.cn\/?p=478\" class=\"readmore\">Read more<span class=\"screen-reader-text\">\u6e90\u6781\u8ddf\u968f\u5668\u4e3a\u4ec0\u4e48\u8ddf\u4e0d\u51c6\uff1a\u4f53\u6548\u5e94\u4e0e\u9a71\u52a8\u80fd\u529b<\/span><span class=\"fa fa-angle-double-right\" aria-hidden=\"true\"><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"tags":[],"views":12,"_links":{"self":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/478"}],"collection":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=478"}],"version-history":[{"count":1,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/478\/revisions"}],"predecessor-version":[{"id":479,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/478\/revisions\/479"}],"wp:attachment":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=478"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=478"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=478"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}