{"id":1321,"date":"2018-11-10T15:05:16","date_gmt":"2018-11-10T15:05:16","guid":{"rendered":""},"modified":"2018-11-10T23:05:35","modified_gmt":"2018-11-10T15:05:35","slug":"%e6%8f%ad%e7%a7%98%e8%82%96%e7%89%b9%e5%9f%ba%e4%ba%8c%e6%9e%81%e7%ae%a1%e5%9c%a8%e7%94%b5%e6%ba%90%e7%ae%a1%e7%90%86%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=1321","title":{"rendered":"\u63ed\u79d8\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u5728\u7535\u6e90\u7ba1\u7406\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"

\u3000\u4efb\u4f55\u975e\u540c\u6b65\u76f4\u6d41\/\u76f4\u6d41\u8f6c\u6362\u5668\u90fd\u9700\u8981\u4e00\u4e2a\u6240\u8c13\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u3002\u4e3a\u4e86\u4f18\u5316\u65b9\u6848\u7684\u6574\u4f53\u6548\u7387\uff0c\u901a\u5e38\u503e\u5411\u4e8e\u9009\u62e9\u4f4e\u6b63\u5411\u7535\u538b\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u3002\u5f88\u591a\u8bbe\u8ba1\u90fd\u91c7\u7528\u4e00\u4e2a\u8f6c\u6362\u5668\u8bbe\u8ba1(\u7f51\u7edc)\u5de5\u5177\u63a8\u8350\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u3002\u8fd9\u5e76\u975e\u603b\u662f\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u7684\u6700\u4f18\u9009\u62e9\u3002\u66f4\u4f55\u51b5\uff0c\u5982\u679c\u8bbe\u8ba1\u5de5\u5177\u4e0d\u8003\u8651\u70ed\u6027\u80fd\u548c\u6f0f\u7535\u6d41\u4e4b\u95f4\u7684\u52a8\u6001\u53d8\u5316\uff0c\u5219\u6781\u6709\u53ef\u80fd\u53d1\u751f\u5b9e\u9645\u6027\u80fd\u6709\u522b\u4e8e\u8bbe\u8ba1\u5de5\u5177\u7684\u5206\u6790\u6216\u6a21\u62df\u51fa\u7684\u7ed3\u679c\u3002\u7acb\u6df1\u946b\u5c06\u5e26\u60a8\u4e00\u8d77\u63a2\u8ba8\u4e00\u4e9b\u5728\u9009\u62e9\u6b63\u786e\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u65f6\u5e94\u4ed4\u7ec6\u8003\u8651\u7684\u5178\u578b\u53c2\u6570\uff0c\u4ee5\u53ca\u5982\u4f55\u5e94\u7528\u8fd9\u4e9b\u53c2\u6570\u6765\u5feb\u901f\u786e\u5b9a\u9009\u578b\u7684\u6b63\u786e\u4e0e\u5426\u3002<\/span>

\n

\n

\n\u3000\u30001\u3001\u68c0\u67e5\u635f\u8017<\/span>

\n

\n\u3000\u3000\u56fe1\u7ed9\u51fa\u4e86\u975e\u540c\u6b65\u76f4\u6d41\/\u76f4\u6d41\u964d\u538b\u8f6c\u6362\u5668\u7684\u57fa\u672c\u6846\u56fe\u3002D1\u662f\u6240\u9700\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u3002\u5de6\u4fa7\u662f\u5f00\u5173S1\u95ed\u5408\u65f6(\u65f6\u95f4\u4e3aT1)\u7684\u7535\u6d41\u60c5\u51b5\uff0c\u53f3\u4fa7\u662f\u5f00\u5173S1\u6253\u5f00\u65f6(\u65f6\u95f4\u4e3aT2)\u7684\u7535\u6d41\u60c5\u51b5\u3002<\/span>

\n

\n\u3000\u3000\u5f53\u65f6\u95f4\u4e3aT2\u65f6\uff0c\u8f93\u51fa\u7535\u6d41(Iout)\u6d41\u7ecfD1\u3002\u6240\u4ea7\u751f\u7684\u635f\u8017\u4e0eD1\u7684\u6b63\u5411\u7535\u538b(Vfw)\u548c\u8f93\u51fa\u7535\u6d41\u76f4\u63a5\u76f8\u5173\u3002PT2\u7b49\u4e8eIout*Vfw\u3002\u663e\u7136\uff0c\u6211\u4eec\u5e0c\u671b\u5c3d\u53ef\u80fd\u964d\u4f4e\u4ee5\u63a7\u5236\u635f\u8017\uff0c\u51cf\u5c11\u53d1\u70ed\u3002<\/span>

\n

\n\u3000\u3000T1\u671f\u95f4\uff0cD1\u5904\u4e8e\u963b\u65ad\u72b6\u6001\u3002\u552f\u4e00\u7684\u7535\u6d41\u662f\u53cd\u5411\u7535\u6d41\u3002\u6b64\u7535\u6d41\u76f8\u5bf9\u8f83\u5f31\uff0c\u5e76\u4e14\u4e3b\u8981\u7531\u963b\u65ad\u7535\u538b\u6216\u8f93\u5165\u7535\u538bVin\u51b3\u5b9a\u3002T1\u9636\u6bb5\u4e8c\u6781\u7ba1\u4ea7\u751f\u7684\u529f\u8017\uff0c\u79f0\u4e3aPT1\uff0c\u5927\u81f4\u7b49\u4e8eIr*Vin\u3002<\/span>

\n

\n\u3000\u3000\u5bf9\u4e8e\u4efb\u4f55\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\uff0c\u5728\u8bbe\u8ba1\u65f6\u90fd\u5b58\u5728\u4e00\u4e2a\u53d6\u820d\u3002\u5373\u6b64\u8bbe\u5907\u8981\u4e48\u9488\u5bf9\u4f4eVf\u8fdb\u884c\u4f18\u5316\uff0c\u8981\u4e48\u9488\u5bf9\u4f4eIr\u8fdb\u884c\u4f18\u5316\u3002\u56e0\u6b64\uff0c\u5982\u679c\u9009\u62e9\u4f4eVf\uff0c\u5219Ir\u5c31\u8f83\u9ad8\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002\u5728\u5b9e\u9645\u5e94\u7528\u8bbe\u8ba1\u65f6\uff0c\u91cd\u8981\u7684\u662f\u4e0d\u4ec5\u8981\u89c2\u5bdfVf\u6216Ir\u7684\u503c\uff0c\u8fd8\u8981\u5206\u6790\u5b83\u4eec\u5728\u5b9e\u9645\u64cd\u4f5c\u4e2d\u4f1a\u4ea7\u751f\u4ec0\u4e48\u7ed3\u679c\u3002Vf\u548cIr\u90fd\u4f1a\u968f\u6e29\u5ea6\u53d8\u5316\u800c\u6539\u53d8\u3002\u5f53\u6e29\u5ea6\u5347\u9ad8\uff0cVf\u4f1a\u964d\u4f4e\uff0c\u5728\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u5347\u6e29\u7684\u540c\u65f6\u964d\u4f4e\u4e86\u70ed\u6269\u6563\u3002\u4f46\u975e\u5e38\u4e0d\u5e78\u7684\u662f\uff0cIr\u4f1a\u968f\u7740\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u6e29\u5ea6\u5347\u9ad8\u800c\u589e\u52a0\u3002\u6240\u4ee5\uff0c\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u6e29\u5ea6\u8d8a\u9ad8\uff0c\u6f0f\u7535\u6d41\u5c31\u8d8a\u591a\uff0c\u5185\u90e8\u529f\u8017\u5c31\u8d8a\u591a\uff0c\u8fd9\u6837\u5c31\u4f7f\u5f97\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u6e29\u5ea6\u66f4\u9ad8\uff0c\u4ece\u800c\u518d\u6b21\u589e\u52a0\u6f0f\u7535\u6d41\uff0c\u5982\u6b64\u5faa\u73af\u3002<\/span>

\n

\n\u3000\u3000\u5982\u679c\u575a\u6301\u91c7\u7528\u57fa\u672c\u7684\u975e\u540c\u6b65\u76f4\u6d41\/\u76f4\u6d41\u8f6c\u6362\u5668\u7684\u8bbe\u8ba1\u6848\u4f8b\uff0c\u4e0d\u59a8\u505a\u4e00\u4e2a\u57fa\u672c\u5206\u6790\u4ee5\u786e\u5b9a\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u5185\u90e8\u529f\u8017\u548c\u7531\u6b64\u5bfc\u81f4\u7684\u8bbe\u5907\u6e29\u5ea6\u3002\u76f4\u6d41\/\u76f4\u6d41\u8f6c\u6362\u5668\u7684\u8fd0\u884c\u5360\u7a7a\u6bd4\u4e0e\u7535\u538b\u8f93\u5165\u8f93\u51fa\u7684\u6bd4\u503c\u76f4\u63a5\u76f8\u5173(DC=Vout\/Vin)\u3002\u7535\u538b\u8f93\u5165\u548c\u8f93\u51fa\u7684\u6bd4\u503c\u8d8a\u4f4e\uff0cT2\u7684\u65f6\u95f4\u5c31\u8d8a\u957f\uff0cPT2\u5bf9\u6574\u4e2a\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u7684\u529f\u8017\u5f71\u54cd\u4e5f\u5c31\u8d8a\u5927\u3002\u53cd\u4e4b\u4ea6\u7136\uff0cT1\u8d8a\u957f(\u6216\u548c\u7684\u6bd4\u503c\u8d8a\u9ad8)\uff0cPT2\u5bf9\u603b\u529f\u8017\u7684\u5f71\u54cd\u5c31\u8d8a\u5c0f\uff0cPT1\u7684\u4f5c\u7528\u5c31\u8d8a\u5927\u3002<\/span>

\n

\n\u3000\u3000\u4ee5\u4e24\u4e2a\u76f4\u6d41\/\u76f4\u6d41\u8f6c\u6362\u5668\u4e3a\u4f8b\uff0c\u4e24\u4e2a\u90fd\u662f24V\u8f93\u5165\u7535\u538b\uff0c\u4f46\u5176\u4e2d\u4e00\u4e2a\u662f18V\u8f93\u51fa\u7535\u538b\u800c\u53e6\u4e00\u4e2a\u662f5V\u3002\u4f7f\u7528Vin\u548cVout\u7684\u6bd4\u503c\u8ba1\u7b97\u5f97\u5230\u5360\u7a7a\u6bd4\uff0c\u5e76\u4e14\u4f7f\u7528\u6570\u636e\u8868\u4e2d\u7684Vf\u548cIr\u503c\u8ba1\u7b97\u51fa\u4e8c\u6781\u7ba1\u5185\u603b\u529f\u7387\u7684\u635f\u5931\u3002\u7136\u540e\u6839\u636e\u603b\u529f\u8017\u8ba1\u7b97\u51fa\u7531\u6b64\u5bfc\u81f4\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u6e29\u5ea6\uff0c\u5e76\u67e5\u627e\u5728\u6b64\u6e29\u5ea6\u4e0b\u7684Vf\u548cIr\u5b9e\u9645\u6570\u503c\u3002\u6700\u540e\u6839\u636e\u65b0\u7684\u8096\u7279\u57fa\u4e8c\u6781\u7ba1\u6e29\u5ea6\u91cd\u65b0\u7b97\u51fa\u5185\u90e8\u529f\u8017\u3002\u8fd9\u4e2a\u8fed\u4ee3\u8fc7\u7a0b\u53ef\u4ee5\u91cd\u590d\u591a\u6b21\u4ee5\u63d0\u9ad8\u7cbe\u786e\u5ea6\uff0c\u4f46\u5982\u679c\u53ea\u60f3\u5927\u81f4\u8868\u660eVf\u548cIr\u7684\u4e0d\u540c\u53d6\u820d\u6240\u4ea7\u751f\u7684\u5f71\u54cd\uff0c\u5355\u6b21\u8fed\u4ee3\u5c31\u8db3\u591f\u4e86\u3002<\/span>

\n

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