{"id":10021194,"date":"2026-01-16T09:51:49","date_gmt":"2026-01-16T01:51:49","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021194"},"modified":"2026-01-16T09:51:49","modified_gmt":"2026-01-16T01:51:49","slug":"%e8%8a%af%e7%89%87%e7%94%b5%e6%ba%90%e9%99%84%e8%bf%910-1%ce%bcf%e7%9a%84%e7%94%b5%e5%ae%b9%e7%9a%84%e4%bd%9c%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021194","title":{"rendered":"\u82af\u7247\u7535\u6e90\u9644\u8fd10.1\u03bcF\u7684\u7535\u5bb9\u7684\u4f5c\u7528\uff1f"},"content":{"rendered":"<p>\u5927\u5bb6\u597d\uff0c\u6211\u662f\u826f\u8bb8\u3002<\/p>\n<p>\u5728\u5d4c\u5165\u5f0f\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u5728\u82af\u7247\u7684\u7535\u6e90\u5f15\u811a\u9644\u8fd1\u770b\u5230\u4e00\u9897\u6216\u591a\u9897 0.1\u03bcF\uff08100nF\uff09\u7684\u7535\u5bb9\uff0c\u8fd9\u4e9b\u5c0f\u5c0f\u7684\u7535\u5bb9\u770b\u4f3c\u4e0d\u8d77\u773c\uff0c\u5374\u5728\u7535\u8def\u4e2d\u626e\u6f14\u7740\u81f3\u5173\u91cd\u8981\u7684\u89d2\u8272\u3002<\/p>\n<p>\u4eca\u5929\u6211\u4eec\u5c31\u6765\u6df1\u5165\u63a2\u8ba8\u4e00\u4e0b\u8fd9\u4e9b\u7535\u5bb9\u7684\u4f5c\u7528\u548c\u8bbe\u8ba1\u8981\u70b9\u3002<\/p>\n<h2>1. \u53bb\u8026\u7535\u5bb9\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<h3>1.1 \u4ec0\u4e48\u662f\u53bb\u8026\u7535\u5bb9<\/h3>\n<p>0.1\u03bcF \u7535\u5bb9\u5728\u82af\u7247\u7535\u6e90\u9644\u8fd1\u6700\u4e3b\u8981\u7684\u4f5c\u7528\u5c31\u662f<strong>\u53bb\u8026<\/strong>\uff08Decoupling\uff09\u3002<\/p>\n<p>\u6240\u8c13\u53bb\u8026\uff0c\u5c31\u662f\u5c06\u82af\u7247\u5de5\u4f5c\u65f6\u4ea7\u751f\u7684\u9ad8\u9891\u566a\u58f0\u4ece\u7535\u6e90\u7ebf\u4e0a\u201c\u9694\u79bb\u201d\u51fa\u53bb\uff0c\u9632\u6b62\u8fd9\u4e9b\u566a\u58f0\u5e72\u6270\u5230\u5176\u4ed6\u7535\u8def\u6216\u8005\u5f71\u54cd\u7535\u6e90\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n<p>\u5f53\u82af\u7247\u5185\u90e8\u7684\u6676\u4f53\u7ba1\u8fdb\u884c\u9ad8\u901f\u5f00\u5173\u65f6\uff0c\u4f1a\u5728\u6781\u77ed\u7684\u65f6\u95f4\u5185\u4ea7\u751f\u5f88\u5927\u7684\u77ac\u6001\u7535\u6d41\u3002<\/p>\n<p>\u8fd9\u4e2a\u7535\u6d41\u9700\u8981\u4ece\u7535\u6e90\u7ebf\u4e0a\u83b7\u53d6\uff0c\u4f46\u7531\u4e8e\u7535\u6e90\u7ebf\u672c\u8eab\u5b58\u5728\u5bc4\u751f\u7535\u611f\uff0c\u65e0\u6cd5\u77ac\u95f4\u63d0\u4f9b\u8db3\u591f\u7684\u7535\u6d41\uff0c\u5c31\u4f1a\u5bfc\u81f4\u7535\u6e90\u7535\u538b\u51fa\u73b0\u77ac\u95f4\u8dcc\u843d\u3002<\/p>\n<p>\u8fd9\u65f6\u5019\uff0c\u9760\u8fd1\u82af\u7247\u7684\u53bb\u8026\u7535\u5bb9\u5c31\u50cf\u4e00\u4e2a\u201c\u7535\u8377\u6c34\u5e93\u201d\uff0c\u53ef\u4ee5\u5feb\u901f\u91ca\u653e\u5b58\u50a8\u7684\u7535\u8377\uff0c\u8865\u5145\u82af\u7247\u6240\u9700\u7684\u77ac\u6001\u7535\u6d41\u3002<\/p>\n<h3>1.2 \u4e3a\u4ec0\u4e48\u9009\u62e9 0.1\u03bcF<\/h3>\n<p>0.1\u03bcF \u8fd9\u4e2a\u5bb9\u503c\u5e76\u4e0d\u662f\u968f\u610f\u9009\u62e9\u7684\uff0c\u800c\u662f\u7ecf\u8fc7\u5927\u91cf\u5de5\u7a0b\u5b9e\u8df5\u603b\u7ed3\u51fa\u6765\u7684\u7ecf\u9a8c\u503c\u3002<\/p>\n<p>\u8fd9\u4e2a\u5bb9\u503c\u5728\u51e0 MHz \u5230\u51e0\u5341 MHz \u7684\u9891\u7387\u8303\u56f4\u5185\u5177\u6709\u8f83\u4f4e\u7684\u963b\u6297\uff0c\u6b63\u597d\u8986\u76d6\u4e86\u5927\u591a\u6570\u6570\u5b57\u82af\u7247\u7684\u5de5\u4f5c\u9891\u7387\u8303\u56f4\u3002<\/p>\n<p>\u4ece\u9891\u7387\u54cd\u5e94\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u7535\u5bb9\u7684\u963b\u6297\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1aZ = 1\/(2\u03c0fC)\u3002<\/p>\n<p>\u5bf9\u4e8e 0.1\u03bcF \u7684\u7535\u5bb9\uff0c\u5728 10MHz \u9891\u7387\u4e0b\u7684\u963b\u6297\u7ea6\u4e3a 0.16\u03a9\uff0c\u8fd9\u4e2a\u963b\u6297\u503c\u8db3\u591f\u5c0f\uff0c\u80fd\u591f\u6709\u6548\u5730\u4e3a\u82af\u7247\u63d0\u4f9b\u9ad8\u9891\u7535\u6d41\u901a\u8def\u3002<\/p>\n<hr>\n<h2>2. \u53bb\u8026\u7535\u5bb9\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<h3>2.1 \u77ac\u6001\u7535\u6d41\u7684\u4f9b\u7ed9<\/h3>\n<p>\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u82af\u7247\u7684\u529f\u8017\u5e76\u4e0d\u662f\u6052\u5b9a\u7684\u3002<\/p>\n<p>\u4ee5 STM32 \u4e3a\u4f8b\uff0c\u5f53 CPU \u4ece\u4f4e\u529f\u8017\u6a21\u5f0f\u7a81\u7136\u5524\u9192\uff0c\u6216\u8005 GPIO \u53e3\u8fdb\u884c\u9ad8\u901f\u7ffb\u8f6c\u65f6\uff0c\u77ac\u95f4\u7535\u6d41\u53ef\u80fd\u4f1a\u4ece\u51e0\u6beb\u5b89\u8df3\u53d8\u5230\u51e0\u5341\u751a\u81f3\u4e0a\u767e\u6beb\u5b89\u3002<\/p>\n<p>\u8fd9\u79cd\u5feb\u901f\u7684\u7535\u6d41\u53d8\u5316\u4f1a\u5728\u7535\u6e90\u7ebf\u7684\u5bc4\u751f\u7535\u611f\u4e0a\u4ea7\u751f\u5f88\u5927\u7684\u538b\u964d\uff0c\u516c\u5f0f\u4e3a\uff1aV = L \u00d7 di\/dt\u3002<\/p>\n<p>\u5047\u8bbe\u7535\u6e90\u7ebf\u7684\u5bc4\u751f\u7535\u611f\u4e3a 10nH\uff08\u8fd9\u662f\u4e00\u4e2a\u6bd4\u8f83\u4fdd\u5b88\u7684\u4f30\u8ba1\u503c\uff09\uff0c\u7535\u6d41\u53d8\u5316\u7387\u4e3a 100mA\/ns\uff0c\u90a3\u4e48\u4ea7\u751f\u7684\u538b\u964d\u5c31\u662f\uff1aV = 10nH \u00d7 (0.1A\/1ns) = 1V\u3002<\/p>\n<p>\u8fd9\u4e2a 1V \u7684\u538b\u964d\u5bf9\u4e8e 3.3V \u4f9b\u7535\u7684\u7cfb\u7edf\u6765\u8bf4\u662f\u975e\u5e38\u4e25\u91cd\u7684\uff0c\u53ef\u80fd\u5bfc\u81f4\u82af\u7247\u590d\u4f4d\u6216\u8005\u5de5\u4f5c\u5f02\u5e38\u3002<\/p>\n<p>\u800c 0.1\u03bcF \u7684\u53bb\u8026\u7535\u5bb9\u5c31\u653e\u7f6e\u5728\u82af\u7247\u65c1\u8fb9\uff0c\u5b83\u4e0e\u82af\u7247\u4e4b\u95f4\u7684\u8fde\u7ebf\u5f88\u77ed\uff0c\u5bc4\u751f\u7535\u611f\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u3002<\/p>\n<p>\u5f53\u82af\u7247\u9700\u8981\u77ac\u6001\u7535\u6d41\u65f6\uff0c\u53bb\u8026\u7535\u5bb9\u53ef\u4ee5\u7acb\u5373\u91ca\u653e\u7535\u8377\uff0c\u5c06\u7535\u6e90\u7535\u538b\u7684\u6ce2\u52a8\u63a7\u5236\u5728\u53ef\u63a5\u53d7\u7684\u8303\u56f4\u5185\u3002<\/p>\n<h3>2.2 \u9ad8\u9891\u566a\u58f0\u7684\u6ee4\u9664<\/h3>\n<p>\u9664\u4e86\u63d0\u4f9b\u77ac\u6001\u7535\u6d41\uff0c\u53bb\u8026\u7535\u5bb9\u8fd8\u80fd\u6ee4\u9664\u7535\u6e90\u7ebf\u4e0a\u7684\u9ad8\u9891\u566a\u58f0\u3002<\/p>\n<p>\u6570\u5b57\u7535\u8def\u5728\u5de5\u4f5c\u65f6\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u9ad8\u9891\u8c10\u6ce2\uff0c\u8fd9\u4e9b\u8c10\u6ce2\u4f1a\u901a\u8fc7\u7535\u6e90\u7ebf\u4f20\u64ad\uff0c\u5e72\u6270\u5176\u4ed6\u7535\u8def\u3002<\/p>\n<p>\u53bb\u8026\u7535\u5bb9\u4e3a\u8fd9\u4e9b\u9ad8\u9891\u566a\u58f0\u63d0\u4f9b\u4e86\u4e00\u6761\u4f4e\u963b\u6297\u7684\u56de\u6d41\u8def\u5f84\uff0c\u5c06\u566a\u58f0\u201c\u77ed\u8def\u201d\u5230\u5730\uff0c\u9632\u6b62\u5b83\u4eec\u6cbf\u7740\u7535\u6e90\u7ebf\u4f20\u64ad\u3002<\/p>\n<p>\u4ece\u7535\u8def\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u53bb\u8026\u7535\u5bb9\u4e0e\u7535\u6e90\u7ebf\u7684\u5bc4\u751f\u7535\u611f\u6784\u6210\u4e86\u4e00\u4e2a\u4f4e\u901a\u6ee4\u6ce2\u5668\u3002<\/p>\n<p>\u9ad8\u9891\u566a\u58f0\u88ab\u7535\u5bb9\u65c1\u8def\u5230\u5730\uff0c\u800c\u4f4e\u9891\u7684\u76f4\u6d41\u7535\u6e90\u4fe1\u53f7\u5219\u53ef\u4ee5\u987a\u5229\u901a\u8fc7\u3002<\/p>\n<p>\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u7535\u6e90\u7684\u7eaf\u51c0\u6027\u3002<\/p>\n<hr>\n<h2>3. \u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u8bbe\u8ba1\u8981\u70b9<\/h2>\n<h3>3.1 \u7535\u5bb9\u7684\u653e\u7f6e\u4f4d\u7f6e<\/h3>\n<p>\u53bb\u8026\u7535\u5bb9\u7684\u653e\u7f6e\u4f4d\u7f6e\u81f3\u5173\u91cd\u8981\uff0c\u5fc5\u987b\u5c3d\u53ef\u80fd\u9760\u8fd1\u82af\u7247\u7684\u7535\u6e90\u5f15\u811a\u3002<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a\u7535\u5bb9\u4e0e\u82af\u7247\u4e4b\u95f4\u7684\u8d70\u7ebf\u4f1a\u5f15\u5165\u5bc4\u751f\u7535\u611f\uff0c\u8d70\u7ebf\u8d8a\u957f\uff0c\u5bc4\u751f\u7535\u611f\u8d8a\u5927\uff0c\u53bb\u8026\u6548\u679c\u5c31\u8d8a\u5dee\u3002<\/p>\n<p>\u5728 PCB \u8bbe\u8ba1\u65f6\uff0c\u6211\u5efa\u8bae\u5c06 0.1\u03bcF \u7535\u5bb9\u653e\u7f6e\u5728\u8ddd\u79bb\u82af\u7247\u7535\u6e90\u5f15\u811a 5mm \u4ee5\u5185\u7684\u4f4d\u7f6e\uff0c\u6700\u597d\u662f\u7d27\u8d34\u7740\u82af\u7247\u3002<\/p>\n<p>\u7535\u5bb9\u7684\u8fc7\u5b54\u4e5f\u8981\u5c3d\u91cf\u9760\u8fd1\u7535\u5bb9\u710a\u76d8\uff0c\u51cf\u5c11\u8d70\u7ebf\u957f\u5ea6\u3002<\/p>\n<p>\u6709\u4e9b\u9ad8\u901f\u7535\u8def\u751a\u81f3\u4f1a\u5c06\u53bb\u8026\u7535\u5bb9\u653e\u7f6e\u5728 PCB \u7684\u80cc\u9762\uff0c\u76f4\u63a5\u5bf9\u5e94\u82af\u7247\u7535\u6e90\u5f15\u811a\u7684\u4f4d\u7f6e\uff0c\u8fd9\u6837\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c0f\u5bc4\u751f\u7535\u611f\u3002<\/p>\n<h3>3.2 \u591a\u4e2a\u7535\u5bb9\u7684\u5e76\u8054\u4f7f\u7528<\/h3>\n<p>\u5728\u5b9e\u9645\u7535\u8def\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u770b\u5230\u82af\u7247\u7535\u6e90\u9644\u8fd1\u4e0d\u6b62\u4e00\u4e2a 0.1\u03bcF \u7535\u5bb9\uff0c\u53ef\u80fd\u8fd8\u4f1a\u6709 10\u03bcF\u30011\u03bcF \u7b49\u4e0d\u540c\u5bb9\u503c\u7684\u7535\u5bb9\u5e76\u8054\u4f7f\u7528\u3002<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a\u4e0d\u540c\u5bb9\u503c\u7684\u7535\u5bb9\u5728\u4e0d\u540c\u9891\u7387\u4e0b\u7684\u53bb\u8026\u6548\u679c\u4e0d\u540c\u3002<\/p>\n<p>\u5927\u5bb9\u503c\u7535\u5bb9\uff08\u5982 10\u03bcF\uff09\u9002\u5408\u6ee4\u9664\u4f4e\u9891\u566a\u58f0\u548c\u63d0\u4f9b\u8f83\u5927\u7684\u7535\u8377\u50a8\u5907\uff0c\u4f46\u7531\u4e8e\u5176\u7b49\u6548\u4e32\u8054\u7535\u611f\uff08ESL\uff09\u8f83\u5927\uff0c\u5728\u9ad8\u9891\u4e0b\u7684\u963b\u6297\u53cd\u800c\u4f1a\u589e\u52a0\u3002<\/p>\n<p>\u800c\u5c0f\u5bb9\u503c\u7535\u5bb9\uff08\u5982 0.1\u03bcF\uff09\u867d\u7136\u7535\u8377\u50a8\u5907\u8f83\u5c11\uff0c\u4f46 ESL \u5c0f\uff0c\u5728\u9ad8\u9891\u4e0b\u963b\u6297\u4f4e\uff0c\u53bb\u8026\u6548\u679c\u597d\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5408\u7406\u7684\u8bbe\u8ba1\u662f\u5c06\u4e0d\u540c\u5bb9\u503c\u7684\u7535\u5bb9\u5e76\u8054\u4f7f\u7528\uff0c\u5f62\u6210\u4e00\u4e2a\u5bbd\u9891\u5e26\u7684\u53bb\u8026\u7f51\u7edc\u3002<\/p>\n<p>\u4e00\u822c\u7684\u914d\u7f6e\u662f\uff1a10\u03bcF\uff08\u6ee4\u9664\u4f4e\u9891\u566a\u58f0\uff09+ 1\u03bcF\uff08\u4e2d\u9891\u53bb\u8026\uff09+ 0.1\u03bcF\uff08\u9ad8\u9891\u53bb\u8026\uff09\u3002<\/p>\n<p>\u5bf9\u4e8e\u6bcf\u4e2a\u7535\u6e90\u5f15\u811a\uff0c\u81f3\u5c11\u8981\u914d\u7f6e\u4e00\u4e2a 0.1\u03bcF \u7535\u5bb9\u3002<\/p>\n<h3>3.3 \u7535\u5bb9\u7c7b\u578b\u7684\u9009\u62e9<\/h3>\n<p>0.1\u03bcF \u53bb\u8026\u7535\u5bb9\u901a\u5e38\u9009\u62e9\u9676\u74f7\u7535\u5bb9\uff08MLCC\uff09\uff0c\u800c\u4e0d\u662f\u7535\u89e3\u7535\u5bb9\u6216\u94bd\u7535\u5bb9\u3002<\/p>\n<p>\u8fd9\u662f\u56e0\u4e3a\u9676\u74f7\u7535\u5bb9\u5177\u6709\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li>ESL \u548c ESR \u90fd\u5f88\u5c0f\uff0c\u9ad8\u9891\u6027\u80fd\u597d<\/li>\n<li>\u4f53\u79ef\u5c0f\uff0c\u4fbf\u4e8e\u9760\u8fd1\u82af\u7247\u653e\u7f6e<\/li>\n<li>\u6e29\u5ea6\u7a33\u5b9a\u6027\u597d<\/li>\n<li>\u4ef7\u683c\u4fbf\u5b9c<\/li>\n<\/ul>\n<p>\u5728\u9009\u62e9\u9676\u74f7\u7535\u5bb9\u65f6\uff0c\u8fd8\u8981\u6ce8\u610f\u5176\u4ecb\u8d28\u7c7b\u578b\u3002<\/p>\n<p>X7R \u548c X5R \u7c7b\u578b\u7684\u7535\u5bb9\u6e29\u5ea6\u7279\u6027\u8f83\u597d\uff0c\u5bb9\u503c\u968f\u6e29\u5ea6\u548c\u7535\u538b\u7684\u53d8\u5316\u8f83\u5c0f\uff0c\u9002\u5408\u7528\u4f5c\u53bb\u8026\u7535\u5bb9\u3002<\/p>\n<p>\u800c Y5V \u7c7b\u578b\u7684\u7535\u5bb9\u867d\u7136\u4fbf\u5b9c\uff0c\u4f46\u5bb9\u503c\u4f1a\u968f\u6e29\u5ea6\u548c\u7535\u538b\u5927\u5e45\u53d8\u5316\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528\u3002<\/p>\n<hr>\n<h2>4. STM32 \u5e94\u7528\u5b9e\u4f8b<\/h2>\n<h3>4.1 STM32 \u7684\u7535\u6e90\u8bbe\u8ba1<\/h3>\n<p>\u4ee5 STM32F407 \u4e3a\u4f8b\uff0c\u8fd9\u6b3e\u82af\u7247\u6709\u591a\u4e2a\u7535\u6e90\u5f15\u811a\uff0c\u5305\u62ec VDD\u3001VDDA\u3001VREF+ \u7b49\u3002<\/p>\n<p>\u5728\u8bbe\u8ba1\u7535\u6e90\u7535\u8def\u65f6\uff0c\u6bcf\u4e2a VDD \u5f15\u811a\u90fd\u9700\u8981\u914d\u7f6e\u53bb\u8026\u7535\u5bb9\u3002\u6839\u636e ST \u5b98\u65b9\u7684\u8bbe\u8ba1\u6307\u5357\uff0c\u63a8\u8350\u7684\u914d\u7f6e\u662f\uff1a<\/p>\n<ul>\n<li>\u6bcf\u4e2a VDD \u5f15\u811a\u914d\u7f6e\u4e00\u4e2a 100nF\uff080.1\u03bcF\uff09\u9676\u74f7\u7535\u5bb9<\/li>\n<li>\u6bcf\u4e2a VDD \u5f15\u811a\u7ec4\u914d\u7f6e\u4e00\u4e2a 4.7\u03bcF \u9676\u74f7\u7535\u5bb9<\/li>\n<li>VDDA \u5f15\u811a\u914d\u7f6e\u4e00\u4e2a 100nF + 1\u03bcF \u9676\u74f7\u7535\u5bb9<\/li>\n<li>\u6574\u4e2a\u82af\u7247\u914d\u7f6e\u4e00\u4e2a 10\u03bcF \u94bd\u7535\u5bb9\u6216\u9676\u74f7\u7535\u5bb9<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u5178\u578b\u7684 STM32 \u7535\u6e90\u53bb\u8026\u7535\u8def\u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"c\">\/\/ \u8fd9\u662f\u786c\u4ef6\u7535\u8def\u8bbe\u8ba1\uff0c\u4e0d\u662f\u4ee3\u7801\uff0c\u8fd9\u91cc\u7528\u6ce8\u91ca\u5f62\u5f0f\u8bf4\u660e\n\n\/*\n * STM32F407 \u7535\u6e90\u53bb\u8026\u7535\u8def\n * \n * VDD_1 (Pin 1)  ---+--- 100nF --- GND\n *                   |\n *                   +--- 4.7\u03bcF --- GND\n * \n * VDD_2 (Pin 19) ---+--- 100nF --- GND\n *                   |\n *                   +--- (\u5171\u7528\u4e0a\u9762\u76844.7\u03bcF)\n * \n * VDD_3 (Pin 28) ---+--- 100nF --- GND\n *                   |\n *                   +--- 4.7\u03bcF --- GND\n * \n * VDDA (Pin 13)  ---+--- 100nF --- GND\n *                   |\n *                   +--- 1\u03bcF --- GND\n * \n * \u6240\u6709VDD ---+--- 10\u03bcF --- GND (\u653e\u7f6e\u5728\u7535\u6e90\u5165\u53e3\u5904)\n *\/<\/code><\/pre>\n<h3>4.2 \u7535\u6e90\u8d28\u91cf\u5bf9\u7a0b\u5e8f\u8fd0\u884c\u7684\u5f71\u54cd<\/h3>\n<p>\u7535\u6e90\u8d28\u91cf\u7684\u597d\u574f\u76f4\u63a5\u5f71\u54cd\u5230 STM32 \u7684\u7a33\u5b9a\u8fd0\u884c\u3002<\/p>\n<p>\u5982\u679c\u53bb\u8026\u7535\u5bb9\u914d\u7f6e\u4e0d\u5f53\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n<p><strong>\u7a0b\u5e8f\u8dd1\u98de\u6216\u6b7b\u673a<\/strong>\uff1a\u5f53\u7535\u6e90\u7535\u538b\u6ce2\u52a8\u8fc7\u5927\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4 CPU \u5185\u6838\u5de5\u4f5c\u5f02\u5e38\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\uff08PC\uff09\u8df3\u8f6c\u5230\u9519\u8bef\u7684\u5730\u5740\uff0c\u9020\u6210\u7a0b\u5e8f\u8dd1\u98de\u3002<\/p>\n<p><strong>ADC \u91c7\u6837\u4e0d\u51c6\u786e<\/strong>\uff1aVDDA \u662f\u6a21\u62df\u7535\u6e90\uff0c\u5982\u679c\u53bb\u8026\u4e0d\u597d\uff0c\u6570\u5b57\u7535\u8def\u7684\u566a\u58f0\u4f1a\u8026\u5408\u5230\u6a21\u62df\u7535\u6e90\u4e0a\uff0c\u5bfc\u81f4 ADC \u91c7\u6837\u7ed3\u679c\u51fa\u73b0\u8f83\u5927\u8bef\u5dee\u3002<\/p>\n<p><strong>\u901a\u4fe1\u5f02\u5e38<\/strong>\uff1a\u9ad8\u901f\u901a\u4fe1\u63a5\u53e3\uff08\u5982 USB\u3001\u4ee5\u592a\u7f51\uff09\u5bf9\u7535\u6e90\u8d28\u91cf\u8981\u6c42\u5f88\u9ad8\uff0c\u7535\u6e90\u566a\u58f0\u53ef\u80fd\u5bfc\u81f4\u901a\u4fe1\u9519\u8bef\u7387\u589e\u52a0\u3002<\/p>\n<p>\u6211\u66fe\u7ecf\u9047\u5230\u8fc7\u4e00\u4e2a\u6848\u4f8b\uff0c\u5ba2\u6237\u53cd\u9988 STM32 \u5728\u9ad8\u8d1f\u8f7d\u8fd0\u884c\u65f6\u5076\u5c14\u4f1a\u590d\u4f4d\u3002<\/p>\n<p>\u7ecf\u8fc7\u6392\u67e5\u53d1\u73b0\uff0c PCB \u4e0a 0.1\u03bcF \u53bb\u8026\u7535\u5bb9\u7684\u4f4d\u7f6e\u79bb\u82af\u7247\u592a\u8fdc\uff0c\u5927\u7ea6\u6709 2cm \u7684\u8ddd\u79bb\u3002<\/p>\n<p>\u5f53 CPU \u9ad8\u901f\u8fd0\u884c\u65f6\uff0c\u77ac\u6001\u7535\u6d41\u65e0\u6cd5\u53ca\u65f6\u8865\u5145\uff0c\u5bfc\u81f4\u7535\u6e90\u7535\u538b\u8dcc\u843d\u89e6\u53d1\u4e86\u6b20\u538b\u590d\u4f4d\u3002<\/p>\n<p>\u540e\u6765\u5c06\u53bb\u8026\u7535\u5bb9\u79fb\u5230\u7d27\u8d34\u82af\u7247\u7684\u4f4d\u7f6e\uff0c\u95ee\u9898\u5c31\u89e3\u51b3\u4e86\u3002<\/p>\n<h3>4.3 \u7535\u6e90\u5b8c\u6574\u6027\u6d4b\u8bd5<\/h3>\n<p>\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u793a\u6ce2\u5668\u6765\u6d4b\u8bd5\u7535\u6e90\u7684\u8d28\u91cf\u3002<\/p>\n<p>\u5c06\u793a\u6ce2\u5668\u63a2\u5934\u7684\u5730\u7ebf\u5c3d\u91cf\u77ed\uff08\u6700\u597d\u4f7f\u7528\u5f39\u7c27\u5730\u7ebf\uff09\uff0c\u6d4b\u91cf\u82af\u7247\u7535\u6e90\u5f15\u811a\u7684\u7535\u538b\u6ce2\u5f62\u3002<\/p>\n<pre><code class=\"c\">\/\/ STM32 GPIO\u9ad8\u901f\u7ffb\u8f6c\u6d4b\u8bd5\u4ee3\u7801\n\/\/ \u7528\u4e8e\u4ea7\u751f\u77ac\u6001\u7535\u6d41\uff0c\u89c2\u5bdf\u7535\u6e90\u6ce2\u52a8\n\nvoid GPIO_HighSpeed_Toggle_Test(void)\n{\n    GPIO_InitTypeDef GPIO_InitStruct = {0};\n    \n    \/\/ \u4f7f\u80fdGPIOA\u65f6\u949f\n    __HAL_RCC_GPIOA_CLK_ENABLE();\n    \n    \/\/ \u914d\u7f6ePA0\u4e3a\u8f93\u51fa\u6a21\u5f0f\uff0c\u6700\u9ad8\u901f\u5ea6\n    GPIO_InitStruct.Pin = GPIO_PIN_0;\n    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;\n    GPIO_InitStruct.Pull = GPIO_NOPULL;\n    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;\n    HAL_GPIO_Init(GPIOA, &amp;GPIO_InitStruct);\n    \n    \/\/ \u9ad8\u901f\u7ffb\u8f6cGPIO\uff0c\u4ea7\u751f\u77ac\u6001\u7535\u6d41\n    while(1)\n    {\n        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET);\n        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_RESET);\n    }\n}<\/code><\/pre>\n<p>\u8fd0\u884c\u4e0a\u8ff0\u4ee3\u7801\u65f6\uff0c\u7528\u793a\u6ce2\u5668\u89c2\u5bdf VDD \u5f15\u811a\u7684\u7535\u538b\u6ce2\u5f62\u3002<\/p>\n<p>\u5982\u679c\u53bb\u8026\u7535\u5bb9\u914d\u7f6e\u5408\u7406\uff0c\u7535\u538b\u6ce2\u52a8\u5e94\u8be5\u5728 \u00b150mV \u4ee5\u5185\u3002<\/p>\n<p>\u5982\u679c\u6ce2\u52a8\u8d85\u8fc7 100mV\uff0c\u5c31\u9700\u8981\u68c0\u67e5\u53bb\u8026\u7535\u5bb9\u7684\u914d\u7f6e\u548c PCB \u5e03\u5c40\u4e86\u3002<\/p>\n<hr>\n<h2>5. \u5e38\u89c1\u95ee\u9898\u548c\u8bef\u533a<\/h2>\n<h3>5.1 \u7535\u5bb9\u5bb9\u503c\u8d8a\u5927\u8d8a\u597d\uff1f<\/h3>\n<p>\u8fd9\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u8bef\u533a\u3002\u867d\u7136\u5927\u5bb9\u503c\u7535\u5bb9\u53ef\u4ee5\u5b58\u50a8\u66f4\u591a\u7684\u7535\u8377\uff0c\u4f46\u5e76\u4e0d\u610f\u5473\u7740\u53bb\u8026\u6548\u679c\u5c31\u66f4\u597d\u3002<\/p>\n<p>\u524d\u9762\u63d0\u5230\uff0c\u5927\u5bb9\u503c\u7535\u5bb9\u7684 ESL \u8f83\u5927\uff0c\u5728\u9ad8\u9891\u4e0b\u963b\u6297\u53cd\u800c\u4f1a\u589e\u52a0\uff0c\u53bb\u8026\u6548\u679c\u53d8\u5dee\u3002<\/p>\n<p>\u6b63\u786e\u7684\u505a\u6cd5\u662f\u6839\u636e\u9891\u7387\u7279\u6027\u9009\u62e9\u5408\u9002\u7684\u5bb9\u503c\uff0c\u5e76\u5c06\u4e0d\u540c\u5bb9\u503c\u7684\u7535\u5bb9\u5e76\u8054\u4f7f\u7528\uff0c\u8986\u76d6\u4e0d\u540c\u7684\u9891\u7387\u8303\u56f4\u3002<\/p>\n<p>\u5bf9\u4e8e\u6570\u5b57\u7535\u8def\u7684\u9ad8\u9891\u53bb\u8026\uff0c0.1\u03bcF \u662f\u4e00\u4e2a\u7ecf\u8fc7\u9a8c\u8bc1\u7684\u6700\u4f73\u9009\u62e9\u3002<\/p>\n<h3>5.2 \u6240\u6709\u7535\u5bb9\u90fd\u653e\u5728\u4e00\u8d77\u53ef\u4ee5\u5417\uff1f<\/h3>\n<p>\u6709\u4e9b\u5de5\u7a0b\u5e08\u4e3a\u4e86\u8282\u7701 PCB \u7a7a\u95f4\uff0c\u4f1a\u5c06\u6240\u6709\u7684\u53bb\u8026\u7535\u5bb9\u96c6\u4e2d\u653e\u7f6e\u5728\u4e00\u4e2a\u533a\u57df\u3002<\/p>\n<p>\u8fd9\u79cd\u505a\u6cd5\u662f\u9519\u8bef\u7684\u3002<\/p>\n<p>\u53bb\u8026\u7535\u5bb9\u5fc5\u987b\u5206\u6563\u653e\u7f6e\uff0c\u6bcf\u4e2a\u7535\u6e90\u5f15\u811a\u90fd\u8981\u6709\u81ea\u5df1\u7684\u53bb\u8026\u7535\u5bb9\uff0c\u5e76\u4e14\u8981\u5c3d\u91cf\u9760\u8fd1\u5f15\u811a\u3002<\/p>\n<p>\u96c6\u4e2d\u653e\u7f6e\u7684\u7535\u5bb9\u4e0e\u82af\u7247\u4e4b\u95f4\u7684\u8d70\u7ebf\u4f1a\u5f15\u5165\u8f83\u5927\u7684\u5bc4\u751f\u7535\u611f\uff0c\u5927\u5927\u964d\u4f4e\u53bb\u8026\u6548\u679c\u3002<\/p>\n<p>\u7279\u522b\u662f\u5bf9\u4e8e\u591a\u7535\u6e90\u5f15\u811a\u7684\u82af\u7247\uff0c\u5982\u679c\u53ea\u5728\u4e00\u4e2a\u5f15\u811a\u9644\u8fd1\u653e\u7f6e\u7535\u5bb9\uff0c\u5176\u4ed6\u5f15\u811a\u7684\u53bb\u8026\u6548\u679c\u4f1a\u5f88\u5dee\u3002<\/p>\n<h3>5.3 0.1\u03bcF \u53ef\u4ee5\u7528\u5176\u4ed6\u5bb9\u503c\u4ee3\u66ff\u5417\uff1f<\/h3>\n<p>\u867d\u7136 0.1\u03bcF \u662f\u6700\u5e38\u7528\u7684\u53bb\u8026\u7535\u5bb9\u5bb9\u503c\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u5bb9\u503c\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5bf9\u4e8e\u4f4e\u901f\u7535\u8def\uff08\u65f6\u949f\u9891\u7387\u5728\u51e0 MHz \u4ee5\u4e0b\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528 0.47\u03bcF \u6216 1\u03bcF \u7684\u7535\u5bb9\u3002<\/p>\n<p>\u5bf9\u4e8e\u8d85\u9ad8\u901f\u7535\u8def\uff08\u65f6\u949f\u9891\u7387\u5728\u51e0\u767e MHz \u4ee5\u4e0a\uff09\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u66f4\u5c0f\u5bb9\u503c\u7684\u7535\u5bb9\uff0c\u5982 0.01\u03bcF \u6216 0.047\u03bcF\u3002<\/p>\n<p>\u4f46\u662f\uff0c0.1\u03bcF \u4f5c\u4e3a\u4e00\u4e2a\u901a\u7528\u7684\u9009\u62e9\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u5e94\u7528\u573a\u666f\u3002<\/p>\n<p>\u5982\u679c\u6ca1\u6709\u7279\u6b8a\u8981\u6c42\uff0c\u4f7f\u7528 0.1\u03bcF \u662f\u6700\u4fdd\u9669\u7684\u505a\u6cd5\u3002<\/p>\n<hr>\n<h2>6. \u603b\u7ed3<\/h2>\n<p>0.1\u03bcF \u53bb\u8026\u7535\u5bb9\u867d\u7136\u5c0f\uff0c\u4f46\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7684\u4f5c\u7528\u5374\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<p>\u5b83\u5c31\u50cf\u82af\u7247\u7684\u201c\u8d34\u8eab\u4fdd\u9556\u201d\uff0c\u65f6\u523b\u51c6\u5907\u7740\u4e3a\u82af\u7247\u63d0\u4f9b\u77ac\u6001\u7535\u6d41\uff0c\u6ee4\u9664\u7535\u6e90\u566a\u58f0\uff0c\u4fdd\u8bc1\u82af\u7247\u7a33\u5b9a\u53ef\u9760\u5730\u5de5\u4f5c\u3002<\/p>\n<p>\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d\uff0c\u6211\u4eec\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<ul>\n<li>\u6bcf\u4e2a\u7535\u6e90\u5f15\u811a\u90fd\u8981\u914d\u7f6e 0.1\u03bcF \u53bb\u8026\u7535\u5bb9<\/li>\n<li>\u7535\u5bb9\u8981\u5c3d\u91cf\u9760\u8fd1\u82af\u7247\u653e\u7f6e\uff0c\u8ddd\u79bb\u4e0d\u8d85\u8fc7 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