{"id":3320,"date":"2021-08-19T23:29:47","date_gmt":"2021-08-19T23:29:47","guid":{"rendered":""},"modified":"2021-08-20T07:31:16","modified_gmt":"2021-08-19T23:31:16","slug":"%e5%9c%ba%e6%95%88%e5%ba%94%e6%99%b6%e4%bd%93%e7%ae%a1%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3320","title":{"rendered":"\u573a\u6548\u5e94\u6676\u4f53\u7ba1\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"

\n\t\u573a\u6548\u5e94\u7ba1\u662f\u8f83\u65b0\u578b\u7684\u534a\u5bfc\u4f53\u6750\u6599\uff0c\u5229\u7528\u7535\u573a\u6548\u5e94\u6765\u63a7\u5236\u6676\u4f53\u7ba1\u7684\u7535\u6d41\uff0c\u56e0\u800c\u5f97\u540d\u3002\u5b83\u7684\u5916\u578b\u4e5f\u662f\u4e00\u4e2a\u4e09\u6781\u7ba1\uff0c\u56e0\u6b64\u53c8\u79f0\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u3002\u5b83\u53ea\u6709\u4e00\u79cd\u8f7d\u6d41\u5b50\u53c2\u4e0e\u5bfc\u7535\u7684\u534a\u5bfc\u4f53\u5668\u4ef6\uff0c\u662f\u4e00\u79cd\u7528\u8f93\u5165\u7535\u538b\u63a7\u5236\u8f93\u51fa\u7535\u6d41\u7684\u534a\u5bfc\u4f53\u5668\u4ef6\u3002\u4ece\u53c2\u4e0e\u5bfc\u7535\u7684\u8f7d\u6d41\u5b50\u6765\u5212\u5206\uff0c\u5b83\u6709\u7535\u5b50\u4f5c\u4e3a\u8f7d\u6d41\u5b50\u7684N\u6c9f\u9053\u5668\u4ef6\u548c\u7a7a\u7a74\u4f5c\u4e3a\u8f7d\u6d41\u5b50\u7684P\u6c9f\u9053\u5668\u4ef6\u3002\u4ece\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\u6765\u5212\u5206\uff0c\u5b83\u6709\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u548c\u7edd\u7f18\u6805\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u4e4b\u5206\u3002<\/p>\n

\n\t1.\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1<\/span><\/p>\n

\n\t(1) \u7ed3\u6784<\/p>\n

\n\tN\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\u5982\u56fe1\u6240\u793a\uff0c\u5b83\u662f\u5728N\u578b\u534a\u5bfc\u4f53\u7845\u7247\u7684\u4e24\u4fa7\u5404\u5236\u9020\u4e00\u4e2aPN\u7ed3\uff0c\u5f62\u6210\u4e24\u4e2aPN\u7ed3\u5939\u7740\u4e00\u4e2aN\u578b\u6c9f\u9053\u7684\u7ed3\u6784\u3002\u4e24\u4e2aP\u533a\u5373\u4e3a\u6805\u6781\uff0cN\u578b\u7845\u7684\u4e00\u7aef\u662f\u6f0f\u6781\uff0c\u53e6\u4e00\u7aef\u662f\u6e90\u6781\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe1\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784<\/p>\n

\n\t(2) \u5de5\u4f5c\u539f\u7406<\/p>\n

\n\t\u4ee5N\u6c9f\u9053\u4e3a\u4f8b\u8bf4\u660e\u5176\u5de5\u4f5c\u539f\u7406\u3002<\/p>\n

\n\t\u5f53UGS=0\u65f6\uff0c\u5728\u6f0f\u3001\u6e90\u4e4b\u95f4\u52a0\u6709\u4e00\u5b9a\u7535\u538b\u65f6\uff0c\u5728\u6f0f\u6e90\u95f4\u5c06\u5f62\u6210\u591a\u5b50\u7684\u6f02\u79fb\u8fd0\u52a8\uff0c\u4ea7\u751f\u6f0f\u6781\u7535\u6d41\u3002\u5f53UGS<0\u65f6\uff0cPN\u7ed3\u53cd\u504f\uff0c\u5f62\u6210\u8017\u5c3d\u5c42\uff0c\u6f0f\u6e90\u95f4\u7684\u6c9f\u9053\u5c06\u53d8\u7a84\uff0cID\u5c06\u51cf\u5c0f\uff0cUGS\u7ee7\u7eed\u51cf\u5c0f\uff0c\u6c9f\u9053\u7ee7\u7eed\u53d8\u7a84\uff0cID\u7ee7\u7eed\u51cf\u5c0f\u76f4\u81f3\u4e3a0\u3002\u5f53\u6f0f\u6781\u7535\u6d41\u4e3a\u96f6\u65f6\u6240\u5bf9\u5e94\u7684\u6805\u6e90\u7535\u538bUGS\u79f0\u4e3a\u5939\u65ad\u7535\u538bUGS(off)\u3002<\/p>\n

\n\t(3)\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u6709\u4e24\u6761\uff0c\u4e00\u662f\u8f93\u51fa\u7279\u6027\u66f2\u7ebf(ID=f(UDS)|UGS=\u5e38\u91cf),\u4e8c\u662f\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf(ID=f(UGS)|UDS=\u5e38\u91cf)\u3002N\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u5982\u56fe2\u6240\u793a\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t(a) \u6f0f\u6781\u8f93\u51fa\u7279\u6027\u66f2\u7ebf \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000(b) \u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u56fe2N\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t2. \u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u5de5\u4f5c\u539f\u7406<\/span><\/p>\n

\n\t\u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u5206\u4e3a\uff1a\u8017\u5c3d\u578b →N\u6c9f\u9053\u3001P\u6c9f\u9053 \u3000\u3000\u589e\u5f3a\u578b →N\u6c9f\u9053\u3001P\u6c9f\u9053<\/p>\n

\n\t(1)N\u6c9f\u9053\u8017\u5c3d\u578b\u7edd\u7f18\u6805\u573a\u6548\u5e94\u7ba1<\/p>\n

\n\tN\u6c9f\u9053\u8017\u5c3d\u578b\u7684\u7ed3\u6784\u548c\u7b26\u53f7\u5982\u56fe3(a)\u6240\u793a\uff0c\u5b83\u662f\u5728\u6805\u6781\u4e0b\u65b9\u7684SiO2\u7edd\u7f18\u5c42\u4e2d\u63ba\u5165\u4e86\u5927\u91cf\u7684\u91d1\u5c5e\u6b63\u79bb\u5b50\u3002\u6240\u4ee5\u5f53UGS=0\u65f6\uff0c\u8fd9\u4e9b\u6b63\u79bb\u5b50\u5df2\u7ecf\u611f\u5e94\u51fa\u53cd\u578b\u5c42\uff0c\u5f62\u6210\u4e86\u6c9f\u9053\u3002\u4e8e\u662f\uff0c\u53ea\u8981\u6709\u6f0f\u6e90\u7535\u538b\uff0c\u5c31\u6709\u6f0f\u6781\u7535\u6d41\u5b58\u5728\u3002\u5f53UGS>0\u65f6\uff0c\u5c06\u4f7fID\u8fdb\u4e00\u6b65\u589e\u52a0\u3002UGS<0\u65f6\uff0c\u968f\u7740UGS\u7684\u51cf\u5c0f\u6f0f\u6781\u7535\u6d41\u9010\u6e10\u51cf\u5c0f\uff0c\u76f4\u81f3ID=0\u3002\u5bf9\u5e94ID=0\u7684UGS\u79f0\u4e3a\u5939\u65ad\u7535\u538b\uff0c\u7528\u7b26\u53f7UGS(off)\u8868\u793a\uff0c\u6709\u65f6\u4e5f\u7528UP\u8868\u793a\u3002N\u6c9f\u9053\u8017\u5c3d\u578b\u7684\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u5982\u56fe30(b)\u6240\u793a\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t(a) \u7ed3\u6784\u793a\u610f\u56fe \u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000(b) \u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u56fe3N\u6c9f\u9053\u8017\u5c3d\u578b\u7edd\u7f18\u6805\u573a\u6548\u5e94\u7ba1\u7ed3\u6784\u548c\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t(2)N\u6c9f\u9053\u589e\u5f3a\u578b\u7edd\u7f18\u6805\u573a\u6548\u5e94\u7ba1<\/p>\n

\n\t\u7ed3\u6784\u4e0e\u8017\u5c3d\u578b\u7c7b\u4f3c\u3002\u4f46\u5f53UGS=0 V\u65f6\uff0c\u5728D\u3001S\u4e4b\u95f4\u52a0\u4e0a\u7535\u538b\u4e0d\u4f1a\u5728D\u3001S\u95f4\u5f62\u6210\u7535\u6d41\u3002 \u5f53\u6805\u6781\u52a0\u6709\u7535\u538b\u65f6\uff0c\u82e50UGS(th)\u65f6\uff0c\u5f62\u6210\u6c9f\u9053\uff0c\u5c06\u6f0f\u6781\u548c\u6e90\u6781\u6c9f\u901a\u3002\u5982\u679c\u6b64\u65f6\u52a0\u6709\u6f0f\u6e90\u7535\u538b\uff0c\u5c31\u53ef\u4ee5\u5f62\u6210\u6f0f\u6781\u7535\u6d41ID\u3002\u5728UGS=0V\u65f6ID=0\uff0c\u53ea\u6709\u5f53UGS>UGS(th)\u540e\u624d\u4f1a\u51fa\u73b0\u6f0f\u6781\u7535\u6d41\uff0c\u8fd9\u79cdMOS\u7ba1\u79f0\u4e3a\u589e\u5f3a\u578bMOS\u7ba1\u3002<\/p>\n

\n\tN\u6c9f\u9053\u589e\u5f3a\u578bMOS\u7ba1\u7684\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\uff0c\u89c1\u56fe4\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe4\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t(3)P\u6c9f\u9053MOS\u7ba1<\/p>\n

\n\tP\u6c9f\u9053MOS\u7ba1\u7684\u5de5\u4f5c\u539f\u7406\u4e0eN\u6c9f\u9053MOS\u7ba1\u5b8c\u5168\u76f8\u540c\uff0c\u53ea\u4e0d\u8fc7\u5bfc\u7535\u7684\u8f7d\u6d41\u5b50\u4e0d\u540c\uff0c\u4f9b\u7535\u7535\u538b\u6781\u6027\u4e0d\u540c\u800c\u5df2\u3002\u8fd9\u5982\u540c\u53cc\u6781\u578b\u4e09\u6781\u7ba1\u6709NPN\u578b\u548cPNP\u578b\u4e00\u6837\u3002<\/p>\n

\n\t3 \u4e3b\u8981\u53c2\u6570<\/p>\n

\n\t(1) \u76f4\u6d41\u53c2\u6570<\/p>\n

\n\t\u6307\u8017\u5c3d\u578bMOS\u5939\u65ad\u7535\u538bUGS=UGS(off) \u3001\u589e\u5f3a\u578bMOS\u7ba1\u5f00\u542f\u7535\u538bUGS(th)\u3001\u8017\u5c3d\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u9971\u548c\u6f0f\u6781\u7535\u6d41IDSS(UGS=0\u65f6\u6240\u5bf9\u5e94\u7684\u6f0f\u6781\u7535\u6d41)\u3001\u8f93\u5165\u7535\u963bRGS.<\/p>\n

\n\t(2) \u4f4e\u9891\u8de8\u5bfcgm<\/p>\n

\n\tgm\u53ef\u4ee5\u5728\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u4e0a\u6c42\u53d6\uff0c\u5355\u4f4d\u662fmS(\u6beb\u897f\u95e8\u5b50)\u3002<\/p>\n

\n\t(3) \u6700\u5927\u6f0f\u6781\u7535\u6d41IDM<\/p>\n

\n\t2 \u573a\u6548\u5e94\u534a\u5bfc\u4f53\u4e09\u6781\u7ba1<\/p>\n

\n\t\u573a\u6548\u5e94\u534a\u5bfc\u4f53\u4e09\u6781\u7ba1\u662f\u53ea\u6709\u4e00\u79cd\u8f7d\u6d41\u5b50\u53c2\u4e0e\u5bfc\u7535\u7684\u534a\u5bfc\u4f53\u5668\u4ef6\uff0c\u662f\u4e00\u79cd\u7528\u8f93\u5165\u7535\u538b\u63a7\u5236\u8f93\u51fa\u7535\u6d41\u7684\u534a\u5bfc\u4f53\u5668\u4ef6\u3002\u4ece\u53c2\u4e0e\u5bfc\u7535\u7684\u8f7d\u6d41\u5b50\u6765\u5212\u5206\uff0c\u5b83\u6709\u7535\u5b50\u4f5c\u4e3a\u8f7d\u6d41\u5b50\u7684N\u6c9f\u9053\u5668\u4ef6\u548c\u7a7a\u7a74\u4f5c\u4e3a\u8f7d\u6d41\u5b50\u7684P\u6c9f\u9053\u5668\u4ef6\u3002\u4ece\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\u6765\u5212\u5206\uff0c\u5b83\u6709\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1JFET(Junction type Field Effect Transister)\u548c\u7edd\u7f18\u6805\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1IGFET( Insulated Gate Field Effect Transister) \u4e4b\u5206\u3002IGFET\u4e5f\u79f0\u91d1\u5c5e-\u6c27\u5316\u7269-\u534a\u5bfc\u4f53\u4e09\u6781\u7ba1MOSFET (Metal Oxide Semicon-ductor FET)\u3002<\/p>\n

\n\t2.2.1 \u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u5de5\u4f5c\u539f\u7406<\/p>\n

\n\t\u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1(MOSFET)\u5206\u4e3a\uff1a<\/p>\n

\n\t\u589e\u5f3a\u578b →N\u6c9f\u9053\u3001P\u6c9f\u9053<\/p>\n

\n\t\u8017\u5c3d\u578b →N\u6c9f\u9053\u3001P\u6c9f\u9053<\/p>\n

\n\tN\u6c9f\u9053\u589e\u5f3a\u578bMOSFET\u7684\u7ed3\u6784\u793a\u610f\u56fe\u548c\u7b26\u53f7\u89c1\u56fe02.13\u3002 \u7535\u6781D(Drain)\u79f0\u4e3a\u6f0f\u6781\uff0c\u76f8\u5f53\u53cc\u6781\u578b\u4e09\u6781\u7ba1\u7684\u96c6\u7535\u6781;<\/p>\n

\n\tG(Gate)\u79f0\u4e3a\u6805\u6781\uff0c\u76f8\u5f53\u4e8e\u7684\u57fa\u6781;<\/p>\n

\n\tS(Source)\u79f0\u4e3a\u6e90\u6781\uff0c\u76f8\u5f53\u4e8e\u53d1\u5c04\u6781\u3002<\/p>\n

\n\t(1)N\u6c9f\u9053\u589e\u5f3a\u578bMOSFET<\/p>\n

\n\t\u2460 \u7ed3\u6784<\/p>\n

\n\t\u6839\u636e\u56fe02.13\uff0cN\u6c9f\u9053\u589e\u5f3a\u578bMOSFET\u57fa\u672c\u4e0a\u662f\u4e00\u79cd\u5de6\u53f3\u5bf9\u79f0\u7684\u62d3\u6251\u7ed3\u6784\uff0c\u5b83\u662f\u5728P\u578b\u534a\u5bfc\u4f53\u4e0a\u751f\u6210\u4e00\u5c42SiO2 \u8584\u819c\u7edd\u7f18\u5c42\uff0c\u7136\u540e\u7528\u5149\u523b\u5de5\u827a\u6269\u6563\u4e24\u4e2a\u9ad8\u63ba\u6742\u7684N\u578b\u533a\uff0c\u4eceN\u578b\u533a\u5f15\u51fa\u7535\u6781\uff0c\u4e00\u4e2a\u662f\u6f0f\u6781D\uff0c\u4e00\u4e2a\u662f\u6e90\u6781S\u3002\u5728\u6e90\u6781\u548c\u6f0f\u6781\u4e4b\u95f4\u7684\u7edd\u7f18\u5c42\u4e0a\u9540\u4e00\u5c42\u91d1\u5c5e\u94dd\u4f5c\u4e3a\u6805\u6781G\u3002P\u578b\u534a\u5bfc\u4f53\u79f0\u4e3a\u886c\u5e95\uff0c\u7528\u7b26\u53f7B\u8868\u793a\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe02.13 N\u6c9f\u9053\u589e\u5f3a\u578bMOSFET\u7684\u7ed3\u6784\u793a\u610f\u56fe\u548c\u7b26\u53f7<\/p>\n

\n\t\u2461 \u5de5\u4f5c\u539f\u7406<\/p>\n

\n\t1.\u6805\u6e90\u7535\u538bVGS\u7684\u63a7\u5236\u4f5c\u7528<\/p>\n

\n\t\u5f53VGS=0 V\u65f6\uff0c\u6f0f\u6e90\u4e4b\u95f4\u76f8\u5f53\u4e24\u4e2a\u80cc\u9760\u80cc\u7684\u4e8c\u6781\u7ba1\uff0c\u5728D\u3001S\u4e4b\u95f4\u52a0\u4e0a\u7535\u538b\u4e0d\u4f1a\u5728D\u3001S\u95f4\u5f62\u6210\u7535\u6d41\u3002<\/p>\n

\n\t\u5f53\u6805\u6781\u52a0\u6709\u7535\u538b\u65f6\uff0c\u82e50<\/p>\n

\n\t\u8fdb\u4e00\u6b65\u589e\u52a0VGS\uff0c\u5f53VGS>VGS(th)\u65f6( VGS(th) \u79f0\u4e3a\u5f00\u542f\u7535\u538b)\uff0c\u7531\u4e8e\u6b64\u65f6\u7684\u6805\u6781\u7535\u538b\u5df2\u7ecf\u6bd4\u8f83\u5f3a\uff0c\u5728\u9760\u8fd1\u6805\u6781\u4e0b\u65b9\u7684P\u578b\u534a\u5bfc\u4f53\u8868\u5c42\u4e2d\u805a\u96c6\u8f83\u591a\u7684\u7535\u5b50\uff0c\u53ef\u4ee5\u5f62\u6210\u6c9f\u9053\uff0c\u5c06\u6f0f\u6781\u548c\u6e90\u6781\u6c9f\u901a\u3002\u5982\u679c\u6b64\u65f6\u52a0\u6709\u6f0f\u6e90\u7535\u538b\uff0c\u5c31\u53ef\u4ee5\u5f62\u6210\u6f0f\u6781\u7535\u6d41ID\u3002\u5728\u6805\u6781\u4e0b\u65b9\u5f62\u6210\u7684\u5bfc\u7535\u6c9f\u9053\u4e2d\u7684\u7535\u5b50\uff0c\u56e0\u4e0eP\u578b\u534a\u5bfc\u4f53\u7684\u8f7d\u6d41\u5b50\u7a7a\u7a74\u6781\u6027\u76f8\u53cd\uff0c\u6545\u79f0\u4e3a\u53cd\u578b\u5c42\u3002\u968f\u7740VGS\u7684\u7ee7\u7eed\u589e\u52a0\uff0cID\u5c06\u4e0d\u65ad\u589e\u52a0\u3002\u5728VGS=0V\u65f6ID=0\uff0c\u53ea\u6709\u5f53VGS>VGS(th)\u540e\u624d\u4f1a\u51fa\u73b0\u6f0f\u6781\u7535\u6d41\uff0c\u8fd9\u79cdMOS\u7ba1\u79f0\u4e3a\u589e\u5f3a\u578bMOS\u7ba1\u3002<\/p>\n

\n\tVGS\u5bf9\u6f0f\u6781\u7535\u6d41\u7684\u63a7\u5236\u5173\u7cfb\u53ef\u7528iD=f(vGS)?VDS=const\u8fd9\u4e00\u66f2\u7ebf\u63cf\u8ff0\uff0c\u79f0\u4e3a\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\uff0c\u89c1\u56fe02.14\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe02.14 \u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u7684\u659c\u7387gm\u7684\u5927\u5c0f\u53cd\u6620\u4e86\u6805\u6e90\u7535\u538b\u5bf9\u6f0f\u6781\u7535\u6d41\u7684\u63a7\u5236\u4f5c\u7528\u3002 gm \u7684\u91cf\u7eb2\u4e3amA\/V\uff0c\u6240\u4ee5gm\u4e5f\u79f0\u4e3a\u8de8\u5bfc\u3002<\/p>\n

\n\t\u8de8\u5bfc\u7684\u5b9a\u4e49\u5f0f\u5982\u4e0b\uff1a<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t2.\u6f0f\u6e90\u7535\u538bVDS\u5bf9\u6f0f\u6781\u7535\u6d41ID\u7684\u63a7\u5236\u4f5c\u7528<\/p>\n

\n\t\u5f53VGS>VGS(th)\uff0c\u4e14\u56fa\u5b9a\u4e3a\u67d0\u4e00\u503c\u65f6\uff0c\u6765\u5206\u6790\u6f0f\u6e90\u7535\u538bVDS\u5bf9\u6f0f\u6781\u7535\u6d41ID\u7684\u5f71\u54cd\u3002VDS\u7684\u4e0d\u540c\u53d8\u5316\u5bf9\u6c9f\u9053\u7684\u5f71\u54cd\u5982\u56fe02.15\u6240\u793a\u3002\u6839\u636e\u6b64\u56fe\u53ef\u4ee5\u6709\u5982\u4e0b\u5173\u7cfb<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u5f53VDS\u4e3a0\u6216\u8f83\u5c0f\u65f6\uff0c\u76f8\u5f53VGD>VGS(th)\uff0c\u6c9f\u9053\u5206\u5e03\u5982\u56fe02.15(a)\uff0c\u6b64\u65f6VDS \u57fa\u672c\u5747\u5300\u964d\u843d\u5728\u6c9f\u9053\u4e2d\uff0c\u6c9f\u9053\u5448\u659c\u7ebf\u5206\u5e03\u3002\u5728\u7d27\u9760\u6f0f\u6781\u5904\uff0c\u6c9f\u9053\u8fbe\u5230\u5f00\u542f\u7684\u7a0b\u5ea6\u4ee5\u4e0a\uff0c\u6f0f\u6e90\u4e4b\u95f4\u6709\u7535\u6d41\u901a\u8fc7\u3002<\/p>\n

\n\t\u5f53VDS\u589e\u52a0\u5230\u4f7fVGD=VGS(th)\u65f6\uff0c\u6c9f\u9053\u5982\u56fe02.15(b)\u6240\u793a\u3002\u8fd9\u76f8\u5f53\u4e8eVDS\u589e\u52a0\u4f7f\u6f0f\u6781\u5904\u6c9f\u9053\u7f29\u51cf\u5230\u521a\u521a\u5f00\u542f\u7684\u60c5\u51b5\uff0c\u79f0\u4e3a\u9884\u5939\u65ad\uff0c\u6b64\u65f6\u7684\u6f0f\u6781\u7535\u6d41ID\u57fa\u672c\u9971\u548c\u3002\u5f53VDS\u589e\u52a0\u5230VGD?VGS(th)\u65f6\uff0c\u6c9f\u9053\u5982\u56fe02.15(c)\u6240\u793a\u3002\u6b64\u65f6\u9884\u5939\u65ad\u533a\u57df\u52a0\u957f\uff0c\u4f38\u5411S\u6781\u3002 VDS\u589e\u52a0\u7684\u90e8\u5206\u57fa\u672c\u964d\u843d\u5728\u968f\u4e4b\u52a0\u957f\u7684\u5939\u65ad\u6c9f\u9053\u4e0a\uff0c ID\u57fa\u672c\u8d8b\u4e8e\u4e0d\u53d8\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe02.15 \u6f0f\u6e90\u7535\u538bVDS\u5bf9\u6c9f\u9053\u7684\u5f71\u54cd(\u52a8\u753b2-5)<\/p>\n

\n\t\u5f53VGS>VGS(th)\uff0c\u4e14\u56fa\u5b9a\u4e3a\u67d0\u4e00\u503c\u65f6\uff0cVDS\u5bf9ID\u7684\u5f71\u54cd\uff0c\u5373iD=f(vDS)?VGS=const\u8fd9\u4e00\u5173\u7cfb\u66f2\u7ebf\u5982\u56fe02.16\u6240\u793a\u3002\u8fd9\u4e00\u66f2\u7ebf\u79f0\u4e3a\u6f0f\u6781\u8f93\u51fa\u7279\u6027\u66f2\u7ebf\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t(a) \u8f93\u51fa\u7279\u6027\u66f2\u7ebf (b)\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u56fe02.16 \u6f0f\u6781\u8f93\u51fa\u7279\u6027\u66f2\u7ebf\u548c\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t(2)N\u6c9f\u9053\u8017\u5c3d\u578bMOSFET<\/p>\n

\n\tN\u6c9f\u9053\u8017\u5c3d\u578bMOSFET\u7684\u7ed3\u6784\u548c\u7b26\u53f7\u5982\u56fe02.17(a)\u6240\u793a\uff0c\u5b83\u662f\u5728\u6805\u6781\u4e0b\u65b9\u7684SiO2\u7edd\u7f18\u5c42\u4e2d\u63ba\u5165\u4e86\u5927\u91cf\u7684\u91d1\u5c5e\u6b63\u79bb\u5b50\u3002\u6240\u4ee5\u5f53VGS=0\u65f6\uff0c\u8fd9\u4e9b\u6b63\u79bb\u5b50\u5df2\u7ecf\u611f\u5e94\u51fa\u53cd\u578b\u5c42\uff0c\u5f62\u6210\u4e86\u6c9f\u9053\u3002\u4e8e\u662f\uff0c\u53ea\u8981\u6709\u6f0f\u6e90\u7535\u538b\uff0c\u5c31\u6709\u6f0f\u6781\u7535\u6d41\u5b58\u5728\u3002\u5f53VGS>0\u65f6\uff0c\u5c06\u4f7fID\u8fdb\u4e00\u6b65\u589e\u52a0\u3002VGS<0\u65f6\uff0c\u968f\u7740VGS\u7684\u51cf\u5c0f\u6f0f\u6781\u7535\u6d41\u9010\u6e10\u51cf\u5c0f\uff0c\u76f4\u81f3ID=0\u3002\u5bf9\u5e94ID=0\u7684VGS\u79f0\u4e3a\u5939\u65ad\u7535\u538b\uff0c\u7528\u7b26\u53f7VGS(off)\u8868\u793a\uff0c\u6709\u65f6\u4e5f\u7528VP\u8868\u793a\u3002N\u6c9f\u9053\u8017\u5c3d\u578bMOSFET\u7684\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u5982\u56fe02.17(b)\u6240\u793a\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t(a) \u7ed3\u6784\u793a\u610f\u56fe (b) \u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u56fe02.17 N\u6c9f\u9053\u8017\u5c3d\u578bMOSFET\u7684\u7ed3\u6784\u548c\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t(3)P\u6c9f\u9053\u8017\u5c3d\u578bMOSFET<\/p>\n

\n\tP\u6c9f\u9053MOSFET\u7684\u5de5\u4f5c\u539f\u7406\u4e0eN\u6c9f\u9053MOSFET\u5b8c\u5168\u76f8\u540c\uff0c\u53ea\u4e0d\u8fc7\u5bfc\u7535\u7684\u8f7d\u6d41\u5b50\u4e0d\u540c\uff0c\u4f9b\u7535\u7535\u538b\u6781\u6027\u4e0d\u540c\u800c\u5df2\u3002\u8fd9\u5982\u540c\u53cc\u6781\u578b\u4e09\u6781\u7ba1\u6709NPN\u578b\u548cPNP\u578b\u4e00\u6837\u3002<\/p>\n

\n\t4.2.2 \u4f0f\u5b89\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u7c7b\u578b\u6bd4\u8f83\u591a\uff0c\u6839\u636e\u5bfc\u7535\u6c9f\u9053\u7684\u4e0d\u540c\u4ee5\u53ca\u662f\u589e\u5f3a\u578b\u8fd8\u662f\u8017\u5c3d\u578b\u53ef\u6709\u56db\u79cd\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u548c\u8f93\u51fa\u7279\u6027\u66f2\u7ebf\uff0c\u5176\u7535\u538b\u548c\u7535\u6d41\u65b9\u5411\u4e5f\u6709\u6240\u4e0d\u540c\u3002\u5982\u679c\u6309\u7edf\u4e00\u89c4\u5b9a\u7684\u6b63\u65b9\u5411\uff0c\u7279\u6027\u66f2\u7ebf\u5c31\u8981\u753b\u5728\u4e0d\u540c\u7684\u8c61\u9650\u3002\u4e3a\u4e86\u4fbf\u4e8e\u7ed8\u5236\uff0c\u5c06P\u6c9f\u9053\u7ba1\u5b50\u7684\u6b63\u65b9\u5411\u53cd\u8fc7\u6765\u8bbe\u5b9a\u3002\u6709\u5173\u66f2\u7ebf\u7ed8\u4e8e\u56fe02.18\u4e4b\u4e2d\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t\u56fe02.18 \u5404\u7c7b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t4.2.3 \u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1<\/p>\n

\n\t(1) \u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784<\/p>\n

\n\t\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\u4e0e\u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u76f8\u4f3c\uff0c\u5de5\u4f5c\u673a\u7406\u4e5f\u76f8\u540c\u3002\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\u5982\u56fe02.19\u6240\u793a\uff0c\u5b83\u662f\u5728N\u578b\u534a\u5bfc\u4f53\u7845\u7247\u7684\u4e24\u4fa7\u5404\u5236\u9020\u4e00\u4e2aPN\u7ed3\uff0c\u5f62\u6210\u4e24\u4e2aPN\u7ed3\u5939\u7740\u4e00\u4e2aN\u578b\u6c9f\u9053\u7684\u7ed3\u6784\u3002\u4e24\u4e2aP\u533a\u5373\u4e3a\u6805\u6781\uff0cN\u578b\u7845\u7684\u4e00\u7aef\u662f\u6f0f\u6781\uff0c\u53e6\u4e00\u7aef\u662f\u6e90\u6781\u3002<\/p>\n

\n\t \"\"<\/p>\n

\n\t\u56fe02.19 \u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784<\/p>\n

\n\t(2) \u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u5de5\u4f5c\u539f\u7406<\/p>\n

\n\t\u6839\u636e\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7ed3\u6784\uff0c\u56e0\u5b83\u6ca1\u6709\u7edd\u7f18\u5c42\uff0c\u53ea\u80fd\u5de5\u4f5c\u5728\u53cd\u504f\u7684\u6761\u4ef6\u4e0b\uff0c\u5bf9\u4e8eN\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u53ea\u80fd\u5de5\u4f5c\u5728\u8d1f\u6805\u538b\u533a\uff0cP\u6c9f\u9053\u7684\u53ea\u80fd\u5de5\u4f5c\u5728\u6b63\u6805\u538b\u533a\uff0c\u5426\u5219\u5c06\u4f1a\u51fa\u73b0\u6805\u6d41\u3002\u73b0\u4ee5N\u6c9f\u9053\u4e3a\u4f8b\u8bf4\u660e\u5176\u5de5\u4f5c\u539f\u7406\u3002<\/p>\n

\n\t\u2460 \u6805\u6e90\u7535\u538b\u5bf9\u6c9f\u9053\u7684\u63a7\u5236\u4f5c\u7528<\/p>\n

\n\t\u5f53VGS=0\u65f6\uff0c\u5728\u6f0f\u3001\u6e90\u4e4b\u95f4\u52a0\u6709\u4e00\u5b9a\u7535\u538b\u65f6\uff0c\u5728\u6f0f\u6e90\u95f4\u5c06\u5f62\u6210\u591a\u5b50\u7684\u6f02\u79fb\u8fd0\u52a8\uff0c\u4ea7\u751f\u6f0f\u6781\u7535\u6d41\u3002\u5f53VGS<0\u65f6\uff0cPN\u7ed3\u53cd\u504f\uff0c\u5f62\u6210\u8017\u5c3d\u5c42\uff0c\u6f0f\u6e90\u95f4\u7684\u6c9f\u9053\u5c06\u53d8\u7a84\uff0cID\u5c06\u51cf\u5c0f\uff0cVGS\u7ee7\u7eed\u51cf\u5c0f\uff0c\u6c9f\u9053\u7ee7\u7eed\u53d8\u7a84\uff0cID\u7ee7\u7eed\u51cf\u5c0f\u76f4\u81f3\u4e3a0\u3002\u5f53\u6f0f\u6781\u7535\u6d41\u4e3a\u96f6\u65f6\u6240\u5bf9\u5e94\u7684\u6805\u6e90\u7535\u538bVGS\u79f0\u4e3a\u5939\u65ad\u7535\u538bVGS(off)\u3002<\/p>\n

\n\t\u2461 \u6f0f\u6e90\u7535\u538b\u5bf9\u6c9f\u9053\u7684\u63a7\u5236\u4f5c\u7528<\/p>\n

\n\t\u5728\u6805\u6781\u52a0\u6709\u4e00\u5b9a\u7684\u7535\u538b\uff0c\u4e14VGS>VGS(off)\uff0c\u82e5\u6f0f\u6e90\u7535\u538bVDS\u4ece\u96f6\u5f00\u59cb\u589e\u52a0\uff0c\u5219VGD=VGS-VDS\u5c06\u968f\u4e4b\u51cf\u5c0f\u3002\u4f7f\u9760\u8fd1\u6f0f\u6781\u5904\u7684\u8017\u5c3d\u5c42\u52a0\u5bbd\uff0c\u6c9f\u9053\u53d8\u7a84\uff0c\u4ece\u5de6\u81f3\u53f3\u5448\u6954\u5f62\u5206\u5e03\uff0c\u5982\u56fe02.21(a)\u6240\u793a\u3002\u5f53VDS\u589e\u52a0\u5230\u4f7fVGD=VGS—VDS=VGS(off)\u65f6\uff0c\u5728\u7d27\u9760\u6f0f\u6781\u5904\u51fa\u73b0\u9884\u5939\u65ad\uff0c\u5982\u56fe02.21(b)\u6240\u793a\u3002\u5f53VDS\u7ee7\u7eed\u589e\u52a0\uff0c\u6f0f\u6781\u5904\u7684\u5939\u65ad\u7ee7\u7eed\u5411\u6e90\u6781\u65b9\u5411\u751f\u957f\u5ef6\u957f\u3002\u4ee5\u4e0a\u8fc7\u7a0b\u4e0e\u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u5341\u5206\u76f8\u4f3c\u3002<\/p>\n

\n\t(3) \u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u6709\u4e24\u6761\uff0c\u4e00\u662f\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\uff0c\u4e8c\u662f\u8f93\u51fa\u7279\u6027\u66f2\u7ebf\u3002\u5b83\u4e0e\u7edd\u7f18\u6805\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u57fa\u672c\u76f8\u540c\uff0c\u53ea\u4e0d\u8fc7\u7edd\u7f18\u6805\u573a\u6548\u5e94\u7ba1\u7684\u6805\u538b\u53ef\u6b63\u3001\u53ef\u8d1f\uff0c\u800c\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u6805\u538b\u53ea\u80fd\u662fP\u6c9f\u9053\u7684\u4e3a\u6b63\u6216N\u6c9f\u9053\u7684\u4e3a\u8d1f\u3002N\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf\u5982\u56fe02.22\u6240\u793a\u3002<\/p>\n


\n\t\"\"<\/center><\/p>\n

\n\t <\/p>\n

\n\t(a) \u6f0f\u6781\u8f93\u51fa\u7279\u6027\u66f2\u7ebf(\u52a8\u753b2-6) (b) \u8f6c\u79fb\u7279\u6027\u66f2\u7ebf(\u52a8\u753b2-7)<\/p>\n

\n\t\u56fe02.22 N\u6c9f\u9053\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u7279\u6027\u66f2\u7ebf<\/p>\n

\n\t4.2.4 \u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u53c2\u6570\u548c\u578b\u53f7<\/p>\n

\n\t(1) \u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u53c2\u6570<\/p>\n

\n\t\u2460 \u5f00\u542f\u7535\u538bVGS(th) (\u6216VT)<\/p>\n

\n\t\u5f00\u542f\u7535\u538b\u662fMOS\u589e\u5f3a\u578b\u7ba1\u7684\u53c2\u6570\uff0c\u6805\u6e90\u7535\u538b\u5c0f\u4e8e\u5f00\u542f\u7535\u538b\u7684\u7edd\u5bf9\u503c\uff0c\u573a\u6548\u5e94\u7ba1\u4e0d\u80fd\u5bfc\u901a\u3002<\/p>\n

\n\t\u2461 \u5939\u65ad\u7535\u538bVGS(off) (\u6216VP)<\/p>\n

\n\t\u5939\u65ad\u7535\u538b\u662f\u8017\u5c3d\u578bFET\u7684\u53c2\u6570\uff0c\u5f53VGS=VGS(off) \u65f6\uff0c\u6f0f\u6781\u7535\u6d41\u4e3a\u96f6\u3002<\/p>\n

\n\t\u2462 \u9971\u548c\u6f0f\u6781\u7535\u6d41IDSS<\/p>\n

\n\t\u8017\u5c3d\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\uff0c\u5f53VGS=0\u65f6\u6240\u5bf9\u5e94\u7684\u6f0f\u6781\u7535\u6d41\u3002<\/p>\n

\n\t\u2463 \u8f93\u5165\u7535\u963bRGS<\/p>\n

\n\t\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u6805\u6e90\u8f93\u5165\u7535\u963b\u7684\u5178\u578b\u503c\uff0c\u5bf9\u4e8e\u7ed3\u578b\u573a\u6548\u5e94\u4e09\u6781\u7ba1\uff0c\u53cd\u504f\u65f6RGS\u7ea6\u5927\u4e8e107Ω\uff0c\u5bf9\u4e8e\u7edd\u7f18\u6805\u573a\u578b\u6548\u5e94\u4e09\u6781\u7ba1\uff0cRGS\u7ea6\u662f109\uff5e1015Ω\u3002<\/p>\n

\n\t\u2464 \u4f4e\u9891\u8de8\u5bfcgm<\/p>\n

\n\t\u4f4e\u9891\u8de8\u5bfc\u53cd\u6620\u4e86\u6805\u538b\u5bf9\u6f0f\u6781\u7535\u6d41\u7684\u63a7\u5236\u4f5c\u7528\uff0c\u8fd9\u4e00\u70b9\u4e0e\u7535\u5b50\u7ba1\u7684\u63a7\u5236\u4f5c\u7528\u5341\u5206\u76f8\u50cf\u3002gm\u53ef\u4ee5\u5728\u8f6c\u79fb\u7279\u6027\u66f2\u7ebf\u4e0a\u6c42\u53d6\uff0c\u5355\u4f4d\u662fmS(\u6beb\u897f\u95e8\u5b50)\u3002<\/p>\n

\n\t\u2465 \u6700\u5927\u6f0f\u6781\u529f\u8017PDM<\/p>\n

\n\t\u6700\u5927\u6f0f\u6781\u529f\u8017\u53ef\u7531PDM= VDS ID\u51b3\u5b9a\uff0c\u4e0e\u53cc\u6781\u578b\u4e09\u6781\u7ba1\u7684PCM\u76f8\u5f53\u3002<\/p>\n

\n\t(2) \u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u578b\u53f7<\/p>\n

\n\t\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u7684\u578b\u53f7\uff0c\u73b0\u884c\u6709\u4e24\u79cd\u547d\u540d\u65b9\u6cd5\u3002\u5176\u4e00\u662f\u4e0e\u53cc\u6781\u578b\u4e09\u6781\u7ba1\u76f8\u540c\uff0c\u7b2c\u4e09\u4f4d\u5b57\u6bcdJ\u4ee3\u8868\u7ed3\u578b\u573a\u6548\u5e94\u7ba1\uff0cO\u4ee3\u8868\u7edd\u7f18\u6805\u573a\u6548\u5e94\u7ba1\u3002\u7b2c\u4e8c\u4f4d\u5b57\u6bcd\u4ee3\u8868\u6750\u6599\uff0cD\u662fP\u578b\u7845\uff0c\u53cd\u578b\u5c42\u662fN\u6c9f\u9053;C\u662fN\u578b\u7845P\u6c9f\u9053\u3002\u4f8b\u5982\uff0c3DJ6D\u662f\u7ed3\u578bN\u6c9f\u9053\u573a\u6548\u5e94\u4e09\u6781\u7ba1\uff0c3DO6C\u662f\u7edd\u7f18\u6805\u578bN\u6c9f\u9053\u573a\u6548\u5e94\u4e09\u6781\u7ba1\u3002<\/p>\n

\n\t\u7b2c\u4e8c\u79cd\u547d\u540d\u65b9\u6cd5\u662fCS××#\uff0cCS\u4ee3\u8868\u573a\u6548\u5e94\u7ba1\uff0c××\u4ee5\u6570\u5b57\u4ee3\u8868\u578b\u53f7\u7684\u5e8f\u53f7\uff0c#\u7528\u5b57\u6bcd\u4ee3\u8868\u540c\u4e00\u578b\u53f7\u4e2d\u7684\u4e0d\u540c\u89c4\u683c\u3002\u4f8b\u5982\uff0cCS14A\u3001CS45G\u7b49\u3002<\/p>\n

\n\t4.2.5 \u53cc\u6781\u578b\u548c\u573a\u6548\u5e94\u578b\u4e09\u6781\u7ba1\u7684\u6bd4\u8f83<\/p>\n

\n\t <\/p>\n


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