{"id":2892,"date":"2019-11-19T03:54:08","date_gmt":"2019-11-19T03:54:08","guid":{"rendered":""},"modified":"2019-11-19T11:54:37","modified_gmt":"2019-11-19T03:54:37","slug":"%e5%a6%82%e4%bd%95%e5%88%a9%e7%94%a8rc%e6%bb%a4%e6%b3%a2%e6%96%b9%e6%b3%95%e6%9d%a5%e5%a4%84%e7%90%86emc%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2892","title":{"rendered":"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898"},"content":{"rendered":"

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\n\t <\/div>\n

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\n\tRC\u4f4e\u901a\u6ee4\u6ce2\u5668<\/p>\n

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\n\t5\u622a\u6b62\u9891\u7387<\/p>\n

\n\t\u6ee4\u6ce2\u5668\u4e0d\u4f1a\u5f15\u8d77\u663e\u8457\u8870\u51cf\u7684\u9891\u7387\u8303\u56f4\u79f0\u4e3a\u901a\u5e26\uff0c\u6ee4\u6ce2\u5668\u786e\u5b9e\u5bfc\u81f4\u663e\u8457\u8870\u51cf\u7684\u9891\u7387\u8303\u56f4\u79f0\u4e3a\u963b\u5e26\u3002\u6a21\u62df\u6ee4\u6ce2\u5668\uff0c\u4f8b\u5982RC\u4f4e\u901a\u6ee4\u6ce2\u5668\uff0c\u603b\u662f\u4ece\u901a\u5e26\u9010\u6e10\u8fc7\u6e21\u5230\u963b\u5e26\u3002\u8fd9\u610f\u5473\u7740\u65e0\u6cd5\u8bc6\u522b\u6ee4\u6ce2\u5668\u505c\u6b62\u4f20\u9012\u4fe1\u53f7\u5e76\u5f00\u59cb\u963b\u585e\u4fe1\u53f7\u7684\u4e00\u4e2a\u9891\u7387\u3002\u7136\u800c\uff0c\u5de5\u7a0b\u5e08\u9700\u8981\u4e00\u79cd\u65b9\u4fbf\uff0c\u7b80\u6d01\u5730\u603b\u7ed3\u6ee4\u6ce2\u5668\u9891\u7387\u54cd\u5e94\u7684\u65b9\u6cd5\uff0c\u8fd9\u5c31\u662f\u622a\u6b62\u9891\u7387\u6982\u5ff5\u53d1\u6325\u4f5c\u7528\u7684\u5730\u65b9\u3002<\/p>\n

\n\t\u5f53\u6211\u4eec\u67e5\u770bRC\u6ee4\u6ce2\u5668\u7684\u9891\u7387\u54cd\u5e94\u56fe\u65f6\uff0c\u4f1a\u6ce8\u610f\u5230\u672f\u8bed“\u622a\u6b62\u9891\u7387”\u4e0d\u662f\u5f88\u51c6\u786e\u3002\u4fe1\u53f7\u5149\u8c31\u88ab“\u5207\u5272”\u6210\u4e24\u534a\u7684\u56fe\u50cf\uff0c\u5176\u4e2d\u4e00\u4e2a\u88ab\u4fdd\u7559\u800c\u5176\u4e2d\u4e00\u4e2a\u88ab\u4e22\u5f03\uff0c \u4e0d\u9002\u7528\uff0c\u56e0\u4e3a\u968f\u7740\u9891\u7387\u4ece\u622a\u6b62\u70b9\u4e0b\u65b9\u79fb\u52a8\u5230\u622a\u6b62\u503c\u4ee5\u4e0a\uff0c\u8870\u51cf\u9010\u6e10\u589e\u52a0\u3002<\/p>\n

\n\tRC\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u622a\u6b62\u9891\u7387\u5b9e\u9645\u4e0a\u662f\u8f93\u5165\u4fe1\u53f7\u5e45\u5ea6\u964d\u4f4e3dB\u7684\u9891\u7387\uff08\u9009\u62e9\u8be5\u503c\u662f\u56e0\u4e3a\u5e45\u5ea6\u964d\u4f4e3dB\u5bf9\u5e94\u4e8e\u529f\u7387\u964d\u4f4e50\uff05\uff09\u3002\u56e0\u6b64\uff0c\u622a\u6b62\u9891\u7387\u4e5f\u79f0\u4e3a-3 dB\u9891\u7387\uff0c\u5b9e\u9645\u4e0a\u8be5\u540d\u79f0\u66f4\u51c6\u786e\u4e14\u4fe1\u606f\u91cf\u66f4\u5927\u3002\u672f\u8bed\u5e26\u5bbd\u662f\u6307\u6ee4\u6ce2\u5668\u901a\u5e26\u7684\u5bbd\u5ea6\uff0c\u5728\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u60c5\u51b5\u4e0b\uff0c\u5e26\u5bbd\u7b49\u4e8e-3 dB\u9891\u7387\uff08\u5982\u4e0b\u56fe\u6240\u793a\uff09\u3002<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u8be5\u56fe\u8868\u793aRC\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u9891\u7387\u54cd\u5e94\u7684\u4e00\u822c\u7279\u6027\u3002\u5e26\u5bbd\u7b49\u4e8e-3 dB\u9891\u7387<\/p>\n

\n\t\u5982\u4e0a\u6240\u8ff0\uff0cRC\u6ee4\u6ce2\u5668\u7684\u4f4e\u901a\u884c\u4e3a\u662f\u7531\u7535\u963b\u5668\u7684\u9891\u7387\u65e0\u5173\u963b\u6297\u4e0e\u7535\u5bb9\u5668\u7684\u9891\u7387\u76f8\u5173\u963b\u6297\u4e4b\u95f4\u7684\u76f8\u4e92\u4f5c\u7528\u5f15\u8d77\u7684\u3002\u4e3a\u4e86\u786e\u5b9a\u6ee4\u6ce2\u5668\u9891\u7387\u54cd\u5e94\u7684\u7ec6\u8282\uff0c\u6211\u4eec\u9700\u8981\u5728\u6570\u5b66\u4e0a\u5206\u6790\u7535\u963b\uff08R\uff09\u548c\u7535\u5bb9\uff08C\uff09\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u6539\u53d8\u8fd9\u4e9b\u503c\uff0c\u4ee5\u8bbe\u8ba1\u6ee1\u8db3\u7cbe\u786e\u89c4\u683c\u7684\u6ee4\u6ce2\u5668\u3002RC\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u622a\u6b62\u9891\u7387\uff08f C\uff09 \u8ba1\u7b97\u5982\u4e0b\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u8bbe\u8ba1\u5b9e\u4f8b\u3002\u7535\u5bb9\u503c\u6bd4\u7535\u963b\u503c\u66f4\u5177\u9650\u5236\u6027\uff0c\u56e0\u6b64\u6211\u4eec\u5c06\u4ece\u5e38\u89c1\u7684\u7535\u5bb9\u503c\uff08\u4f8b\u598210 nF\uff09\u5f00\u59cb\uff0c\u7136\u540e\u6211\u4eec\u5c06\u4f7f\u7528\u8be5\u516c\u5f0f\u6765\u786e\u5b9a\u6240\u9700\u7684\u7535\u963b\u503c\u3002\u76ee\u6807\u662f\u8bbe\u8ba1\u4e00\u4e2a\u6ee4\u6ce2\u5668\uff0c\u5b83\u5c06\u4fdd\u75595 kHz\u97f3\u9891\u6ce2\u5f62\u5e76\u6291\u5236500 kHz \u566a\u58f0\u6ce2\u5f62\u3002\u6211\u4eec\u5c06\u5c1d\u8bd5100 kHz\u7684\u622a\u6b62\u9891\u7387\uff0c\u7a0d\u540e\u5728\u6587\u7ae0\u4e2d\u6211\u4eec\u5c06\u66f4\u4ed4\u7ec6\u5730\u5206\u6790\u6b64\u6ee4\u6ce2\u5668\u5bf9\u4e24\u4e2a\u9891\u7387\u5206\u91cf\u7684\u5f71\u54cd\u3002<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u56e0\u6b64\uff0c160Ω\u7535\u963b\u4e0e10 nF\u7535\u5bb9\u76f8\u7ed3\u5408\uff0c\u5c06\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e00\u4e2a\u975e\u5e38\u63a5\u8fd1\u6240\u9700\u9891\u7387\u54cd\u5e94\u7684\u6ee4\u6ce2\u5668\u3002<\/p>\n

\n\t6\u8ba1\u7b97\u8fc7\u6ee4\u5668\u54cd\u5e94<\/p>\n

\n\t\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5178\u578b\u5206\u538b\u5668\u8ba1\u7b97\u7684\u9891\u7387\u76f8\u5173\u7248\u672c\u6765\u8ba1\u7b97\u4f4e\u901a\u6ee4\u6ce2\u5668\u7684\u7406\u8bba\u884c\u4e3a\u3002\u7535\u963b\u5206\u538b\u5668\u7684\u8f93\u51fa\u8868\u793a\u5982\u4e0b\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\tRC\u6ee4\u6ce2\u5668\u4f7f\u7528\u7b49\u6548\u7ed3\u6784\uff0c\u4f46\u662f\u6211\u4eec\u6709\u4e00\u4e2a\u7535\u5bb9\u5668\u4ee3\u66ffR 2\u3002\u9996\u5148\uff0c\u6211\u4eec\u7528\u7535\u5bb9\u5668\u7684\u7535\u6297\uff08X C\uff09\u4ee3\u66ffR 2\uff08\u5728\u5206\u5b50\u4e2d\uff09\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u9700\u8981\u8ba1\u7b97\u603b\u963b\u6297\u7684\u5927\u5c0f\u5e76\u5c06\u5176\u653e\u5728\u5206\u6bcd\u4e2d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u6709\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u7535\u5bb9\u5668\u7684\u7535\u6297\u8868\u793a\u4e0e\u7535\u6d41<\/u>\u7684\u76f8\u53cd\u91cf\uff0c\u4f46\u4e0e\u7535\u963b\u4e0d\u540c\uff0c\u76f8\u53cd\u91cf\u53d6\u51b3\u4e8e\u901a\u8fc7\u7535\u5bb9\u5668\u7684\u4fe1\u53f7\u9891\u7387\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5fc5\u987b\u8ba1\u7b97\u7279\u5b9a\u9891\u7387\u7684\u7535\u6297\uff0c\u6211\u4eec\u7528\u4e8e\u6b64\u7684\u7b49\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u5728\u4e0a\u9762\u7684\u8bbe\u8ba1\u5b9e\u4f8b\u4e2d\uff0cR≈160Ω\u4e14C = 10nF\u3002\u6211\u4eec\u5047\u8bbeV IN\u7684\u5e45\u5ea6\u662f1 V\uff0c \u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u7b80\u5355\u5730\u4ece\u8ba1\u7b97\u4e2d\u53bb\u6389V IN\u3002\u9996\u5148\u8ba9\u6211\u4eec\u4ee5\u6b63\u5f26\u6ce2\u9891\u7387\u8ba1\u7b97VOUT\u7684\u5e45\u5ea6\uff1a<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u6b63\u5f26\u6ce2\u7684\u5e45\u5ea6\u57fa\u672c\u4e0d\u53d8\u3002\u8fd9\u5f88\u597d\uff0c\u56e0\u4e3a\u6211\u4eec\u7684\u76ee\u7684\u662f\u5728\u6291\u5236\u566a\u97f3\u7684\u540c\u65f6\u4fdd\u6301\u6b63\u5f26\u6ce2\u3002\u8fd9\u4e2a\u7ed3\u679c\u5e76\u4e0d\u4ee4\u4eba\u60ca\u8bb6\uff0c\u56e0\u4e3a\u6211\u4eec\u9009\u62e9\u7684\u622a\u6b62\u9891\u7387\uff08100 kHz\uff09 \u8fdc\u9ad8\u4e8e\u6b63\u5f26\u6ce2\u9891\u7387\uff085 kHz\uff09\u3002<\/p>\n

\n\t\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u770b\u6ee4\u6ce2\u5668\u5982\u4f55\u6210\u529f\u8870\u51cf\u566a\u58f0\u5206\u91cf\u3002<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u566a\u58f0\u5e45\u5ea6\u4ec5\u4e3a\u5176\u539f\u59cb\u503c\u7684\u7ea620\uff05\u3002<\/p>\n

\n\t7\u53ef\u89c6\u5316\u8fc7\u6ee4\u5668\u54cd\u5e94<\/p>\n

\n\t\u8bc4\u4f30\u6ee4\u6ce2\u5668\u5bf9\u4fe1\u53f7\u5f71\u54cd\u7684\u6700\u65b9\u4fbf\u65b9\u6cd5\u662f\u68c0\u67e5\u6ee4\u6ce2\u5668\u9891\u7387\u54cd\u5e94\u7684\u56fe\u3002\u8fd9\u4e9b\u56fe\u5f62<\/u>\u901a\u5e38\u79f0\u4e3a\u6ce2\u5fb7\u56fe\uff0c\u5728\u5782\u76f4\u8f74\u4e0a\u5177\u6709\u5e45\u5ea6\uff08\u4ee5\u5206\u8d1d\u4e3a\u5355\u4f4d\uff09\uff0c\u5728\u6c34\u5e73\u8f74\u4e0a\u5177\u6709\u9891\u7387; \u6c34\u5e73\u8f74\u901a\u5e38\u5177\u6709\u6307\u6570\u6807\u5ea6\uff0c\u4f7f\u5f971Hz\u548c10Hz\u4e4b\u95f4\u7684\u7269\u7406\u8ddd\u79bb\u4e0e10Hz\u548c100Hz\u4e4b\u95f4\uff0c100Hz\u548c1kHz\u4e4b\u95f4\u7684\u7269\u7406\u8ddd\u79bb\u76f8\u540c\u3002\u8fd9\u79cd\u8868\u793a\u65b9\u6cd5\u4f7f\u6211\u4eec\u80fd\u591f\u5feb\u901f\u51c6\u786e\u5730\u8bc4\u4f30\u6ee4\u6ce2\u5668\u5728\u5f88\u5927\u9891\u7387\u8303\u56f4\u5185\u7684\u4f5c\u7528\u3002<\/p>\n

\n\t\"\u5982\u4f55\u5229\u7528RC\u6ee4\u6ce2\u65b9\u6cd5\u6765\u5904\u7406EMC\u95ee\u9898\"<\/p>\n

\n\t\u9891\u7387\u54cd\u5e94\u56fe\u7684\u4e00\u4e2a\u4f8b\u5b50<\/p>\n

\n\t\u66f2\u7ebf\u4e0a\u7684\u6bcf\u4e2a\u70b9\u8868\u793a\u5982\u679c\u8f93\u5165\u4fe1\u53f7\u7684\u5e45\u5ea6\u4e3a1 V\u4e14\u9891\u7387\u7b49\u4e8e\u6c34\u5e73\u8f74\u4e0a\u7684\u76f8\u5e94\u503c\uff0c\u5219\u8f93\u51fa\u4fe1\u53f7\u5c06\u5177\u6709\u7684\u5e45\u5ea6\u3002\u4f8b\u5982\uff0c\u5f53\u8f93\u5165\u9891\u7387\u4e3a1 MHz\u65f6\uff0c\u8f93\u51fa\u5e45\u5ea6\uff08\u5047\u8bbe\u8f93\u5165\u5e45\u5ea6\u4e3a1 V\uff09\u5c06\u4e3a0.1 V\uff08\u56e0\u4e3a-20 dB\u5bf9\u5e94\u4e8e\u5341\u500d\u51cf\u5c11\u56e0\u5b50\uff09\u3002<\/p>\n

\n\t\u901a\u5e26\u4e2d\u7684\u66f2\u7ebf\u51e0\u4e4e\u5b8c\u5168\u5e73\u5766\uff0c\u7136\u540e\u968f\u7740\u8f93\u5165\u9891\u7387\u63a5\u8fd1\u622a\u6b62\u9891\u7387\uff0c\u5b83\u5f00\u59cb\u4e0b\u964d\u5f97\u66f4\u5feb\u3002\u6700\u7ec8\uff0c\u8870\u51cf\u7684\u53d8\u5316\u7387\u7a33\u5b9a\u572820 dB \/ decade\u3002\u5373\uff0c\u8f93\u5165\u9891\u7387\u6bcf\u589e\u52a0\u5341\u500d\uff0c\u8f93\u51fa\u4fe1\u53f7\u7684\u5e45\u5ea6\u964d\u4f4e20 dB\u3002<\/p>\n

\n\t8\u8bc4\u4f30\u4f4e\u901a\u6ee4\u6ce2\u5668\u6027\u80fd<\/p>\n

\n\t\u5982\u679c\u6211\u4eec\u4ed4\u7ec6\u7ed8\u5236\u6211\u4eec\u5728\u672c\u6587\u524d\u9762\u8bbe\u8ba1\u7684\u6ee4\u6ce2\u5668\u7684\u9891\u7387\u54cd\u5e94\uff0c\u6211\u4eec\u5c06\u770b\u52305 kHz\u65f6\u7684\u5e45\u5ea6\u54cd\u5e94\u57fa\u672c\u4e0a\u662f0 dB\uff08\u5373\u51e0\u4e4e\u4e3a\u96f6\u8870\u51cf\uff09\uff0c500 kHz\u65f6\u7684\u5e45\u5ea6\u54cd\u5e94\u7ea6\u4e3a-14 dB\uff08\u5bf9\u5e94\u4e8e0.2\u7684\u589e\u76ca\uff09\u3002\u8fd9\u4e9b\u503c\u4e0e\u6211\u4eec\u5728\u4e0a\u4e00\u8282\u4e2d\u6267\u884c\u7684\u8ba1\u7b97\u7ed3\u679c\u4e00\u81f4\u3002<\/p>\n

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\n\t9\u4f4e\u901a\u6ee4\u6ce2\u5668\u76f8\u79fb<\/p>\n

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\n\t11\u603b\u7ed3<\/p>\n

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