{"id":2754,"date":"2019-08-09T01:10:23","date_gmt":"2019-08-09T01:10:23","guid":{"rendered":""},"modified":"2019-08-09T09:10:42","modified_gmt":"2019-08-09T01:10:42","slug":"%e9%ab%98%e9%80%9f%e6%95%b0%e5%ad%97%e7%94%b5%e8%b7%af%e7%9a%84%e7%94%b5%e7%a3%81%e5%85%bc%e5%ae%b9%e6%80%a7%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2754","title":{"rendered":"\u9ad8\u901f\u6570\u5b57\u7535\u8def\u7684\u7535\u78c1\u517c\u5bb9\u6027\u8bbe\u8ba1"},"content":{"rendered":"

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\n\t <\/div>\n

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\n\t\u5f53\u786c\u4ef6\u5de5\u4f5c\u9891\u7387\u589e\u9ad8\u540e\uff0c\u6bcf\u4e00\u6839\u5e03\u7ebf\u7f51\u7edc\u4e0a\u7684\u4f20\u8f93\u7ebf\u90fd\u53ef\u80fd\u6210\u4e3a\u53d1\u5c04\u5929\u7ebf\uff0c\u5bf9\u5176\u4ed6\u7535\u5b50\u8bbe\u5907\u4ea7\u751f\u7535\u78c1\u8f90\u5c04\u6216\u4e0e\u5176\u4ed6\u8bbe\u5907\u76f8\u4e92\u5e72\u6270\uff0c\u4ece\u800c\u4f7f\u786c\u4ef6\u65f6\u5e8f\u903b\u8f91\u4ea7\u751f\u6df7\u4e71\u3002\u7535\u78c1\u517c\u5bb9\u6027\uff08Electrom<\/u>agneti<\/u>c CompaTIbility\uff0cEMC<\/u>\uff09\u7684\u6807\u51c6\u63d0\u51fa\u4e86\u89e3\u51b3\u786c\u4ef6\u5b9e\u9645\u5e03\u7ebf\u7f51\u7edc\u53ef\u80fd\u4ea7\u751f\u7684\u7535\u78c1\u8f90\u5c04\u5e72\u6270\u4ee5\u53ca\u672c\u8eab\u62b5\u6297\u5916\u90e8\u7535\u78c1\u5e72\u6270\u7684\u57fa\u672c\u8981\u6c42\u3002<\/p>\n

\n\t1 \u9ad8\u901f\u6570\u5b57\u7535\u8def\u8bbe\u8ba1\u7684\u51e0\u4e2a\u57fa\u672c\u6982\u5ff5<\/p>\n

\n\t\u5728\u9ad8\u901f\u6570\u5b57\u7535\u8def\u4e2d\uff0c\u7531\u4e8e\u4e32\u6270\u3001\u53cd\u5c04\u3001\u8fc7\u51b2\u3001\u632f\u8361\u3001\u5730\u5f39\u3001\u504f\u79fb\u7b49\u4fe1\u53f7\u5b8c\u6574\u6027\u95ee\u9898\uff0c\u672c\u6765\u5728\u4f4e\u901f\u7535\u8def\u4e2d\u65e0\u9700\u8003\u8651\u7684\u56e0\u7d20\u5728\u8fd9\u91cc\u5c31\u663e\u5f97\u683c\u5916\u91cd\u8981\uff1b\u53e6\u5916\uff0c\u968f\u7740\u73b0\u6709\u7535\u6c14\u7cfb\u7edf\u8026\u5408<\/u>\u7ed3\u6784\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u7535\u78c1\u517c\u5bb9\u6027\u4e5f\u53d8\u6210\u4e86\u4e00\u4e2a\u4e0d\u80fd\u4e0d\u8003\u8651\u7684\u95ee\u9898\u3002<\/p>\n

\n\t\u8981\u89e3\u51b3\u9ad8\u901f\u7535\u8def\u8bbe\u8ba1\u7684\u95ee\u9898\uff0c\u9996\u5148\u9700\u8981\u771f\u6b63\u660e\u767d\u9ad8\u901f\u4fe1\u53f7\u7684\u6982\u5ff5\u3002\u9ad8\u901f\u4e0d\u662f\u5c31\u9891\u7387\u7684\u9ad8\u4f4e\u6765\u8bf4\u7684\uff0c\u800c\u662f\u7531\u4fe1\u53f7\u7684\u8fb9\u6cbf\u901f\u5ea6\u51b3\u5b9a\u7684\uff0c\u4e00\u822c\u8ba4\u4e3a\u4e0a\u5347\u65f6\u95f4\u5c0f\u4e8e4\u500d\u4fe1\u53f7\u4f20\u8f93\u5ef6\u8fdf\u65f6\u53ef\u89c6\u4e3a\u9ad8\u901f\u4fe1\u53f7\u3002\u5373\u4f7f\u5728\u5de5\u4f5c\u9891\u7387\u4e0d\u9ad8\u7684\u7cfb\u7edf\u4e2d\uff0c\u4e5f\u4f1a\u51fa\u73b0\u4fe1\u53f7\u5b8c\u6574\u6027\u7684\u95ee\u9898\u3002\u8fd9\u662f\u7531\u4e8e\u968f\u7740\u96c6\u6210\u7535\u8def<\/u>\u5de5\u827a\u7684\u63d0\u9ad8\uff0c\u6240\u7528\u5668\u4ef6I\uff0fO\u7aef\u53e3\u7684\u4fe1\u53f7\u8fb9\u6cbf\u6bd4\u4ee5\u524d\u66f4\u9661\u66f4\u5feb\uff0c\u56e0\u6b64\u5728\u5de5\u4f5c\u65f6\u949f\u4e0d\u9ad8\u7684\u60c5\u51b5\u4e0b\u4e5f\u5c5e\u4e8e\u9ad8\u901f\u5668\u4ef6\uff0c\u968f\u4e4b\u5e26\u6765\u4e86\u4fe1\u53f7\u5b8c\u6574\u6027\u7684\u79cd\u79cd\u95ee\u9898\u3002<\/p>\n

\n\t2 \u9ad8\u901f\u6570\u5b57\u7535\u8def\u8bbe\u8ba1\u7684\u57fa\u672c\u8981\u6c42<\/p>\n

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\n\t2.1 \u7aef\u63a5\u5339\u914d<\/p>\n

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\n\t\"\u9ad8\u901f\u6570\u5b57\u7535\u8def\u7684\u7535\u78c1\u517c\u5bb9\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t\u7528\u56fe1\u6240\u793a\u7684\u7406\u60f3\u4f20\u8f93\u7ebf\u6a21\u578b\u6765\u5206\u6790\u4e0e\u4fe1\u53f7\u53cd\u5c04\u6709\u5173\u7684\u91cd\u8981\u53c2\u6570\u3002\u56fe\u4e2d\uff0c\u7406\u60f3\u4f20\u8f93\u7ebfL\u88ab\u5185\u963b\u4e3aR0\u7684\u6570\u5b57\u4fe1\u53f7\u9a71\u52a8\u6e90Vs\u9a71\u52a8\uff0c\u4f20\u8f93\u7ebf\u7684\u7279\u6027\u963b\u6297\u4e3aZ0\uff0c\u8d1f\u8f7d\u963b\u6297\u4e3aRL\u3002<\/p>\n

\n\t\u8d1f\u8f7d\u7aef\u963b\u6297\u4e0e\u4f20\u8f93\u7ebf\u963b\u6297\u4e0d\u5339\u914d\u4f1a\u5728\u8d1f\u8f7d\u7aef\uff08B\u70b9\uff09\u53cd\u5c04\u4e00\u90e8\u5206\u4fe1\u53f7\u56de\u6e90\u7aef\uff08A\u70b9\uff09\uff0c\u53cd\u5c04\u7535\u538b\u4fe1\u53f7\u7684\u5e45\u503c\u7531\u8d1f\u8f7d\u53cd\u5c04\u7cfb\u6570ρL\u51b3\u5b9a\uff1a<\/p>\n

\n\t<\/p>\n

\n\t\u5f0f\u4e2dρL\u79f0\u4e3a\u8d1f\u8f7d\u7535\u538b\u53cd\u5c04\u7cfb\u6570\uff0c\u5b83\u5b9e\u9645\u4e0a\u662f\u53cd\u5c04\u7535\u538b\u4e0e\u5165\u5c04\u7535\u538b\u4e4b\u6bd4\u3002<\/p>\n

\n\t\u7531\u5f0f\uff081\uff09\u53ef\u89c1\uff0c-1≤ρL≤+1\uff0c\u4e14\u5f53RL=Z0\u65f6\uff0cρL=0\uff0c\u8fd9\u65f6\u5c31\u4e0d\u4f1a\u53d1\u751f\u53cd\u5c04\u3002\u5373\u53ea\u8981\u6839\u636e\u4f20\u8f93\u7ebf\u7684\u7279\u6027\u963b\u6297\u8fdb\u884c\u7ec8\u7aef\u5339\u914d\uff0c\u5c31\u80fd\u6d88\u9664\u53cd\u5c04\u3002\u4ece\u539f\u7406\u4e0a\u8bf4\uff0c\u53cd\u5c04\u6ce2\u7684\u5e45\u5ea6\u53ef\u4ee5\u5927\u5230\u5165\u5c04\u7535\u538b\u7684\u5e45\u5ea6\uff0c\u6781\u6027\u53ef\u6b63\u53ef\u8d1f\u3002\u5f53RLL\u300a0\uff0c\u5904\u4e8e\u8fc7\u963b\u5c3c\u72b6\u6001\uff0c\u53cd\u5c04\u6ce2\u6781\u6027\u4e3a\u8d1f\uff1b\u5f53RL\u300bZ0\u65f6\uff0cρL\u300b0\uff0c\u5904\u4e8e\u6b20\u963b\u5c3c\u72b6\u6001\uff0c\u53cd\u5c04\u6ce2\u6781\u6027\u4e3a\u6b63\u3002<\/p>\n

\n\t\u5f53\u4ece\u8d1f\u8f7d\u7aef\u53cd\u5c04\u56de\u7684\u7535\u538b\u5230\u8fbe\u6e90\u7aef\u65f6\uff0c\u53c8\u5c06\u518d\u6b21\u53cd\u5c04\u56de\u8d1f\u8f7d\u7aef\uff0c\u5f62\u6210\u4e8c\u6b21\u53cd\u5c04\u6ce2\uff0c\u6b64\u65f6\u53cd\u5c04\u7535\u538b\u7684\u5e45\u503c\u7531\u6e90\u53cd\u5c04\u7cfb\u6570ρS\u51b3\u5b9a\uff1a<\/p>\n

\n\t<\/p>\n

\n\t\u4f20\u8f93\u7ebf\u7684\u7aef\u63a5\u901a\u5e38\u91c7\u7528\u4e24\u79cd\u7b56\u7565\uff1a\u8d1f\u8f7d\u7aef\u5e76\u884c\u7aef\u63a5\u5339\u914d\u3001\u6e90\u7aef\u4e32\u884c\u7aef\u63a5\u5339\u914d\u3002\u53ea\u8981\u8d1f\u8f7d\u53cd\u5c04\u7cfb\u6570\u6216\u6e90\u53cd\u5c04\u7cfb\u6570\u4e8c\u8005\u4efb\u4e00\u4e3a\u96f6\uff0c\u53cd\u5c04\u90fd\u5c06\u88ab\u6d88\u9664\u3002\u5e76\u884c\u7aef\u63a5\u5728\u4fe1\u53f7\u80fd\u91cf\u53cd\u5c04\u56de\u6e90\u7aef\u4e4b\u524d\u5728\u8d1f\u8f7d\u7aef\u6d88\u9664\u53cd\u5c04\uff0c\u5373\u4f7fρL=0\uff0c\u6d88\u9664\u4e00\u6b21\u53cd\u5c04\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c0f\u566a\u58f0\u3001\u7535\u78c1\u5e72\u6270\uff08EMI\uff09\u53ca\u5c04\u9891<\/u>\u5e72\u6270\uff08RF<\/u>I\uff09\uff1b\u4e32\u884c\u7aef\u63a5\u5219\u662f\u5728\u6e90\u7aef\u6d88\u9664\u7531\u8d1f\u8f7d\u7aef\u53cd\u5c04\u56de\u6765\u7684\u4fe1\u53f7\uff0c\u5373\u4f7fρs=0\u548cρL=1\uff08\u8d1f\u8f7d\u7aef\u4e0d\u52a0\u4efb\u4f55\u5339\u914d\uff09\uff0c\u53ea\u662f\u6d88\u9664\u4e8c\u6b21\u53cd\u5c04\uff0c\u5728\u53d1\u751f\u7535\u5e73\u8f6c\u79fb\u65f6\uff0c\u6e90\u7aef\u4fe1\u53f7\u4f1a\u51fa\u73b0\u6301\u7eed\u65f6\u95f4\u4e3a2TD\uff08TD\u4e3a\u4fe1\u53f7\u6e90\u7aef\u5230\u7ec8\u7aef\u7684\u4f20\u8f93\u5ef6\u8fdf\uff09\u7684\u534a\u6ce2\u6ce2\u5f62\uff0c\u8fd9\u610f\u5473\u7740\u6cbf\u4f20\u8f93\u7ebf\u4e0d\u80fd\u52a0\u5165\u5176\u4ed6\u4fe1\u53f7\u8f93\u5165\u7aef\uff0c\u56e0\u4e3a\u5728\u4e0a\u8ff02TD\u65f6\u95f4\u5185\u4f1a\u51fa\u73b0\u4e0d\u6b63\u786e\u7684\u903b\u8f91\u6001\u3002\u4e24\u79cd\u7aef\u63a5\u7b56\u7565\u5404\u6709\u5176\u4f18\u7f3a\u70b9\uff0c\u4e0d\u8fc7\u7531\u4e8e\u5e76\u884c\u7aef\u63a5\u7684\u5339\u914d\u7f51\u7edc\u9700\u8981\u4e0e\u7535\u6e90\u8fde\u63a5\uff0c\u4f7f\u7528\u8f83\u4e3a\u590d\u6742\uff1b\u4e32\u884c\u7aef\u63a5\u53ea\u9700\u8981\u5728\u4fe1\u53f7\u6e90\u7aef\u4e32\u5165\u4e00\u4e2a\u7535\u963b<\/u>\uff0c\u6d88\u8017\u529f\u7387\u5c0f\u800c\u4e14\u6613\u4e8e\u5b9e\u73b0\uff0c\u6709\u8f83\u5927\u7684\u5b9e\u9645\u5de5\u7a0b\u5e94\u7528\u4ef7\u503c\uff0c\u6240\u4ee5\u88ab\u5e7f\u6cdb\u91c7\u7528\u3002<\/p>\n

\n\t2.2 \u9632\u6b62\u5730\u5f39<\/p>\n

\n\t\u5f53PCB\u677f\u4e0a\u7684\u4f17\u591a\u6570\u5b57\u4fe1\u53f7\u540c\u6b65\u8fdb\u884c\u5207\u6362\u65f6\uff08\u5982CPU<\/u>\u7684\u6570\u636e\u603b\u7ebf\u3001\u5730\u5740\u603b\u7ebf\u7b49\uff09\uff0c\u7531\u4e8e\u7535\u6e90\u7ebf\u548c\u5730\u7ebf\u4e0a\u5b58\u5728\u963b\u6297\uff0c\u4f1a\u4ea7\u751f\u540c\u6b65\u5207\u6362\u566a\u58f0\uff08Simultaneous SwitchNoise\uff0cSSN\uff09\u3002\u4e0e\u6b64\u540c\u65f6\uff0c\u7531\u4e8e\u82af\u7247\u5c01\u88c5\u7535\u611f\u7684\u5b58\u5728\uff0c\u5728\u7535\u8def\u540c\u6b65\u5207\u6362\u8fc7\u7a0b\u4e2d\u5f62\u6210\u7684\u5927\u7535\u6d41<\/u>\u6d8c\u52a8\u4f1a\u5f15\u8d77\u5730\u5e73\u9762\u7684\u53cd\u5f39\u566a\u58f0\uff08\u7b80\u79f0\u4e3a\u5730\u5f39\uff09\uff0c\u8fd9\u6837\u5728\u771f\u6b63\u7684\u5730\u5e73\u9762\uff080 V\uff09\u4e0a\u5c31\u8981\u4ea7\u751f\u7535\u538b\u7684\u6ce2\u52a8\u548c\u53d8\u5316\uff0c\u8fd9\u4e2a\u566a\u58f0\u4f1a\u5f71\u54cd\u5176\u4ed6\u5143\u5668\u4ef6<\/u>\u7684\u52a8\u4f5c\u3002<\/p>\n

\n\tSSN\u548c\u5730\u5f39\u7684\u5f3a\u5ea6\u4e5f\u53d6\u51b3\u4e8e\u96c6\u6210\u7535\u8def\u7684I\uff0fO\u7279\u6027\u3001PCB\u677f\u7535\u6e90\u5c42\u548c\u5730\u5e73\u9762\u5c42\u7684\u963b\u6297\u4ee5\u53ca\u9ad8\u901f\u5668\u4ef6\u5728PCB\u677f\u4e0a\u7684\u5e03\u5c40\u548c\u5e03\u7ebf\u65b9\u5f0f\uff0c\u8d1f\u8f7d\u7535\u5bb9\u7684\u589e\u5927\u3001\u8d1f\u8f7d\u7535\u963b\u7684\u51cf\u5c0f\u3001\u5730\u7535\u611f\u7684\u589e\u5927\u3001\u540c\u65f6\u5f00\u5173<\/u>\u5668\u4ef6\u6570\u76ee\u7684\u589e\u52a0\u5747\u4f1a\u5bfc\u81f4\u5730\u5f39\u7684\u589e\u5927\u3002\u5728\u9ad8\u901fPCB\u7535\u8def\u8bbe\u8ba1\u4e2d\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u4e00\u4e9b\u57fa\u672c\u63aa\u65bd\u6765\u51cf\u5c0fSSN\u548c\u5730\u5f39\u7684\u5f71\u54cd\uff1a<\/p>\n

\n\t\u2460\u964d\u4f4e\u8f93\u51fa\u7ffb\u8f6c\u901f\u5ea6\u3002\u4e00\u4e9b\u65b0\u7684\u603b\u7ebf\u9a71\u52a8\u5668\u4ef6\u91c7\u7528\u5185\u5d4c\u7684\u7535\u8def\u8bbe\u8ba1\uff0c\u5728\u5bf9\u4f20\u8f93\u5ef6\u65f6\u5f71\u54cd\u6700\u5c0f\u7684\u524d\u63d0\u4e0b\uff0c\u964d\u4f4e\u7ffb\u8f6c\u901f\u5ea6\u3002<\/p>\n

\n\t\u2461\u91c7\u7528\u5206\u79bb\u7684\u4e13\u95e8\u53c2\u8003\u5730\u3002\u5206\u79bb\u7684\u53c2\u8003\u5730\u7531\u4e8e\u7535\u6d41\u5f88\u5c0f\uff0c\u5730\u53cd\u5c04\u73b0\u8c61\u4f1a\u5927\u5927\u51cf\u5c0f\u3002\u5206\u79bb\u5730\u7684\u82af\u7247\u8981\u6ce8\u610f\u4f7f\u6bcf\u4e2a\u5730\u7ebf\u80fd\u591f\u6709\u76f4\u63a5\u5230\u5730\u5e73\u9762\u7684\u6700\u77ed\u8def\u5f84\u3002<\/p>\n

\n\t\u2462\u964d\u4f4e\u7cfb\u7edf\u4f9b\u7ed9\u7535\u6e90\u7684\u7535\u611f\u3002\u9ad8\u901f\u7535\u8def\u8bbe\u8ba1\u4e2d\u8981\u6c42\u4f7f\u7528\u5355\u72ec\u7684\u7535\u6e90\u5c42\uff0c\u5e76\u8ba9\u7535\u6e90\u5c42\u548c\u5730\u5e73\u9762\u5c3d\u91cf\u63a5\u8fd1\u3002<\/p>\n

\n\t\u2463\u964d\u4f4e\u82af\u7247\u5c01\u88c5\u4e2d\u7684\u7535\u6e90\u548c\u5730\u5f15\u811a\u7684\u7535\u611f\u3002\u6bd4\u5982\u589e\u52a0\u7535\u6e90\uff0f\u5730\u7684\u5f15\u811a\u6570\u76ee\uff0c\u51cf\u77ed\u5f15\u7ebf\u957f\u5ea6\uff0c\u5c3d\u53ef\u80fd\u91c7\u7528\u5927\u9762\u79ef\u94fa\u94dc\u3002<\/p>\n

\n\t\u2464\u589e\u52a0\u7535\u6e90\u548c\u5730\u7684\u4e92\u611f\u3002\u8981\u8ba9\u7535\u6e90\u548c\u5730\u7684\u5f15\u811a\u6210\u5bf9\u5206\u5e03\uff0c\u5e76\u5c3d\u91cf\u9760\u8fd1\u3002<\/p>\n

\n\t\u2465\u7ed9\u7cfb\u7edf\u7535\u6e90\u589e\u52a0\u65c1\u8def\u7535\u5bb9\uff0c\u8fd9\u4e9b\u7535\u5bb9\u53ef\u4ee5\u7ed9\u9ad8\u9891\u7684\u77ac\u53d8\u4ea4\u6d41\u4fe1\u53f7\u63d0\u4f9b\u4f4e\u7535\u611f\u7684\u65c1\u8def\uff0c\u800c\u53d8\u5316\u8f83\u6162\u7684\u4fe1\u53f7\u4ecd\u7136\u8d70\u7cfb\u7edf\u7535\u6e90\u56de\u8def\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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