{"id":3023,"date":"2020-03-31T01:32:25","date_gmt":"2020-03-31T01:32:25","guid":{"rendered":""},"modified":"2020-03-31T09:33:25","modified_gmt":"2020-03-31T01:33:25","slug":"%e6%89%8b%e6%8a%8a%e6%89%8b%e6%95%99%e7%b3%bb%e5%88%97%e4%b9%8biir%e6%95%b0%e5%ad%97%e6%bb%a4%e6%b3%a2%e5%99%a8%e8%ae%be%e8%ae%a1%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3023","title":{"rendered":"\u624b\u628a\u624b\u6559\u7cfb\u5217\u4e4bIIR\u6570\u5b57\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u5b9e\u73b0"},"content":{"rendered":"<p style=\"margin-right: 0px; margin-bottom: 12px; margin-left: 0px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; margin-top: 0px !important; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3010\u5bfc\u8bfb\u3011\uff1a\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u4e2d\u7ecf\u5e38\u9700\u8981\u91c7\u96c6\u6a21\u62df\u4fe1\u53f7\uff0c\u91c7\u96c6\u6a21\u62df\u4fe1\u53f7\u7684\u4fe1\u53f7\u94fe\u4e2d\u96be\u514d\u5f15\u5165\u5e72\u6270\uff0c\u90a3\u4e48\u5982\u4f55\u6ee4\u9664\u5e72\u6270\u5462\uff1f\u4eca\u5929\u5c31\u6765\u4e2a\u4e00\u6b65\u4e00\u6b65\u63cf\u8ff0\u5982\u4f55\u8bbe\u8ba1\u90e8\u7f72\u4e00\u4e2aIIR<u style=\"color: rgb(51, 51, 51) !important;\">\u6ee4\u6ce2\u5668<\/u>\u5230\u4f60\u7684\u7cfb\u7edf\u3002\u5199\u8fd9\u7bc7\u6587\u7ae0\u8003\u8651\u5230\u5f88\u591a\u7c89\u4e1d\u662f\u505a<u style=\"color: rgb(51, 51, 51) !important;\">\u5355\u7247\u673a<\/u>\u7cfb\u7edf\u5f00\u53d1\u7684\uff0c\u7ecf\u5e38\u4f1a\u9700\u8981\u91c7\u96c6\u6a21\u62df\u4fe1\u53f7\uff0c\u7cfb\u7edf\u4e2d\u5f80\u5f80\u5b58\u5728\u5404\u79cd\u5404\u6837\u7684\u5e72\u6270\uff0c\u5e72\u6270\u5e38\u5e38\u8ba9\u4eba\u4e00\u7b79\u83ab\u5c55\uff0c\u6240\u4ee5\u82b1\u4e86\u4e00\u5468\u65f6\u95f4\u6574\u7406\u51faIIR\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u90e8\u7f72\u7684\u5e72\u8d27\u6587\u7ae0\uff0c\u7167\u6b64\u4e00\u6b65\u4e00\u6b65\u505a\uff0c\u4f60\u5fc5\u4f1a\u89e3\u51b3\u5927\u90e8\u5206\u5e72\u6270\u95ee\u9898\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; 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color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000<u style=\"color: rgb(51, 51, 51) !important;\">MATLAB<\/u>\u63d0\u4f9b\u4e86\u975e\u5e38\u5bb9\u6613\u4f7f\u7528\u7684FDATool\u5e2e\u52a9\u6211\u4eec\u8bbe\u8ba1\u6570\u5b57\u6ee4\u6ce2\u5668\uff0c\u771f\u6b63\u7cbe\u5f69\u7684\u5730\u65b9\u5f00\u59cb\u4e86\uff0c\u8ba9\u6211\u4eec\u62ed\u76ee\u4ee5\u5f85\u7a76\u7adf\u5982\u4f55\u4e00\u6b65\u4e00\u6b65\u8bbe\u8ba1\u5e76\u5b9e\u65bd\u4e00\u4e2aIIR\u6ee4\u6ce2\u5668\u3002\u9996\u5148\u6253\u5f00MATLAB\uff0c\u5728\u547d\u4ee4\u884c\u4e2d\u6572fdatool\uff0c\u7136\u540e\u6572\u56de\u8f66<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/093325L06-4.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 600px; height: 595px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5728\u8bbe\u8ba1\u5177\u4f53\uff0c\u6709\u51e0\u4e2a\u76f8\u5173\u6982\u5ff5\u9700\u8981\u6f84\u6e05\uff1aFs\uff1a\u91c7\u6837\u7387\uff0c\u5355\u4f4d\u4e3aHz\uff0c\u771f\u5b9e\u90e8\u7f72\u5728\u7cfb\u7edf\u4e2d\uff0c\u8bf7\u52a1\u5fc5\u786e\u4fdd\u6837\u672c\u662f\u6309\u7167\u6052\u5b9a\u91c7\u6837\u7387\u8fdb\u884c\u91c7\u6837\uff0c\u5426\u5219\u5c06\u5f97\u4e0d\u5230\u60f3\u8981\u7684\u6548\u679c\u3002Fpass\uff1a \u901a\u9891\u5e26\uff0c\u5355\u4f4d\u4e3aHz\uff0c\u5373\u7cfb\u7edf\u4e2d\u671f\u671b\u901a\u8fc7\u7684\u6700\u9ad8\u9891\u7387\u3002Fstop\uff1a \u622a\u81f3\u9891\u7387\uff0c\u5373\u5e45\u9891\u54cd\u5e94\u7684-3dB\u5904\u7684\u9891\u7387\uff0c\u8fd9\u4e2a\u5982\u4e0d\u7406\u89e3\uff0c\u8bf7\u81ea\u884c\u67e5\u9605\u76f8\u5173\u4e66\u7c4d\u3002\u5206\u8d1ddB\uff1a \u8fd9\u662f\u4e00\u4e2a\u65e0\u5355\u4f4d\u53cd\u5e94\u8f93\u51fa\u4e0e\u8f93\u5165\u500d\u6570\u7684\u4e00\u4e2a\u672f\u8bed\u3002\u7535\u5b66\u4e2d\u5206\u8d1d\u4e0e\u653e\u5927\u500d\u6570\u7684\u8f6c\u6362\u5173\u7cfb\u4e3a\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; 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color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000A\uff08p\uff09\uff08dB\uff09=10lg\uff08Po\/<u style=\"color: rgb(51, 51, 51) !important;\">Pi<\/u>\uff09\uff1b\u529f\u7387\u589e\u76ca\uff0cPo \u4e3a\u8f93\u51fa\u529f\u7387\uff0cPi\u4e3a\u8f93\u5165\u529f\u7387<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u6ee4\u6ce2\u5668\u7c7b\u578b\uff1a\u8fd9\u91cc\u6709Butterworth\uff08\u5df4\u7279\u6c83\u65af\uff09\u3001Chebyshev Type I\uff0cChebyshev Type II\u3001\uff08\u5207\u6bd4\u96ea\u592b\uff09\u3001Elipic \u7b49\u53ef\u9009\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/09332551A-5.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 275px; height: 151px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5df4\u7279\u6c83\u65af Butterworth\uff0c\u4e5f\u88ab\u79f0\u4f5c\u6700\u5927\u5e73\u5766\u6ee4\u6ce2\u5668\u3002\u5df4\u7279\u6c83\u65af\u6ee4\u6ce2\u5668\u7684\u7279\u70b9\u662f\u901a\u9891\u5e26\u5185\u7684\u9891\u7387\u54cd\u5e94\u66f2\u7ebf\u6700\u5927\u9650\u5ea6\u5e73\u5766\uff0c\u6ca1\u6709\u7eb9\u6ce2\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5207\u6bd4\u96ea\u592b Chebyshev\uff0c\u662f\u5728\u901a\u5e26\u6216\u963b\u5e26\u4e0a\u9891\u7387\u54cd\u5e94\u5e45\u5ea6\u7b49\u6ce2\u7eb9\u6ce2\u52a8\u7684\u6ee4\u6ce2\u5668\u3002\u5207\u6bd4\u96ea\u592b\u6ee4\u6ce2\u5668\u5728\u8fc7\u6e21\u5e26\u6bd4\u5df4\u7279\u6c83\u65af\u6ee4\u6ce2\u5668\u7684\u8870\u51cf\u5feb\uff0c\u4f46\u9891\u7387\u54cd\u5e94\u7684\u5e45\u9891\u7279\u6027\u4e0d\u5982\u540e\u8005\u5e73\u5766\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u692d\u5706 EllipTIc\uff0c\u692d\u5706\u6ee4\u6ce2\u5668\u662f\u5728\u901a\u5e26\u548c\u963b\u5e26\u7b49\u6ce2\u7eb9\u7684\u4e00\u79cd\u6ee4\u6ce2\u5668\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000&hellip;\u8fd9\u91cc\u5c31\u4e0d\u4e00\u4e00\u4ecb\u7ecd\u4e86\uff0c\u6709\u5174\u8da3\u53ef\u4ee5\u53bb\u67e5\u4fe1\u53f7\u5904\u7406\u4e66\u7c4d\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5c31\u5176\u7279\u70b9\uff0c\u8fd9\u91cc\u5bf9\u5176\u4e2d\u51e0\u79cd\u7565\u4f5c\u4ecb\u7ecd\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5df4\u7279\u6c83\u65af\u5177\u6709\u6700\u5e73\u5766\u7684\u901a\u5e26\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u692d\u5706\u6ee4\u6ce2\u5668\u8870\u51cf\u6700\u5feb\uff0c\u4f46\u662f\u901a\u5e26\u3001\u963b\u5e26\u90fd\u6709\u6ce2\u7eb9\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5207\u6bd4\u96ea\u592b\u6ee4\u6ce2\u5668\u8870\u51cf\u6bd4\u5df4\u7279\u6c83\u65af\u5feb\uff0c\u4f46\u6bd4\u692d\u5706\u6ee4\u6ce2\u5668\u6162\uff0c\u6ce2\u7eb9\u533a\u57df\u53ef\u9009\u62e9\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5047\u8bbe\u6211\u4eec\u9700\u8981\u8bbe\u8ba1\u4e00\u4e2aIIR\u6ee4\u6ce2\u5668\uff0c\u91c7\u6837\u7387\u4e3a32000Hz\uff0c \u6709\u7528\u4fe1\u53f7\u9891\u7387\u572810000Hz\u5185\uff0c\u8bbe\u8ba1IIR\u6ee4\u6ce2\u5668\u5bf9\u4fe1\u53f7\u8fdb\u884c\u6570\u5b57\u6ee4\u6ce2\u3002\u8fd9\u91cc\u4e3a\u8282\u7701\u7b97\u529b\uff0c\u6211\u4eec\u6307\u5b9a\u6ee4\u6ce2\u5668\u7684\u9636\u6570\uff0c\u4e5f\u5373\u4f20\u9012\u51fd\u6570\u4e2dN\/M\u4e2d\u7684\u6700\u5927\u503c\uff0c\u4e00\u822c\u800c\u8a00N\u5927\u4e8eM\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u8fd9\u91cc\u6307\u5b9a\u9636\u6570\u4e3a8\u9636\uff0c\u7c7b\u578b\u6307\u5b9a\u4e3a\u5df4\u7279\u6c83\u65af\u578bIIR\u6ee4\u6ce2\u5668\uff0c\u8f93\u5165\u9636\u65708\u9636\uff0c\u91c7\u6837\u738732000Hz\uff0c\u7136\u540e\u70b9\u51fbDesign Filter\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933256149-6.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 617px; height: 884px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u5c06\u5e45\u9891\u4e0e\u76f8\u9891\u66f2\u7ebf\u653e\u5728\u4e00\u4e2a\u9891\u7387\u5750\u6807\u4e0a\u53bb\u770b\u8bbe\u8ba1\u7ed3\u679c\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933253622-7.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 620px; height: 409px;\" \/><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5bfc\u51fa\u6ee4\u6ce2\u5668\u53c2\u6570\uff0c\u8fd9\u91cc\u6211\u4eec\u9009\u62e9\uff0c<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u7136\u540e\u5c31\u5f97\u5230\u4e86\u4e00\u4e2a\u6587\u4ef6\uff0c\u4fdd\u5b582KHz_LPF.fcf\uff0c\u6587\u4ef6\u540d\u968f\u4f60\u559c\u6b22\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/093325D30-8.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 620px; height: 885px;\" \/><br \/>\n\t&nbsp;<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u6240\u8c13\u76f4\u63a5II\u578b\uff0cSOS\uff08second order section\uff09\u7406\u89e3\u5f88\u7b80\u5355\uff0c\u672c\u8d28\u662f\u5c06IIR Z\u4f20\u9012\u51fd\u6570\u5206\u89e3\u4e3a\u4e0a\u8ff0\u4e8c\u9636\u5757\u7684\u7ea7\u8054\u5f62\u5f0f\u3002<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<strong>\u3000\u3000\u90e8\u7f72<u>\u6d4b\u8bd5<\/u>\u6ee4\u6ce2\u5668<\/strong><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5230\u8fd9\u91cc\uff0c\u6ca1\u6709\u7ecf\u9a8c\u7684\u670b\u53cb\u53ef\u80fd\u4f1a\u8bf4\uff0c\u8fd9\u4e48\u4e00\u5806\u53c2\u6570\u6211\u8be5\u548b\u7528\u5462\uff1f<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u9700\u8981\u81ea\u5df1\u53bb\u5199\u524d\u9762\u63cf\u8ff0\u7684\u8ba1\u7b97\u516c\u5f0f\u5417\uff1f\u5f53\u7136\u4f60\u4e5f\u53ef\u4ee5\u8fd9\u4e48\u505a\uff0c\u8fd9\u91cc\u5c31\u4e0d\u5199\u4e86\uff0c<u style=\"color: rgb(51, 51, 51) !important;\">ARM<\/u>\u7684CMSIS\u5e93\u5df2\u7ecf\u5e2e\u5927\u5bb6\u8bbe\u8ba1\u597d\u4e86\u79cd\u7c7b\u7e41\u591a\u7684\u6570\u5b57\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5b9e\u73b0\u4e86\uff0c\u800c\u4e14\u7ecf\u8fc7\u4e86\u6d4b\u8bd5\uff0c\u8fd9\u91cc\u76f4\u63a5\u62ff\u6765\u7528\u5373\u53ef\u3002\u6709\u5174\u8da3\u81ea\u5df1\u5199\u4e5f\u4e0d\u96be\uff0c\u53ea\u8981\u7406\u89e3Z\u4f20\u9012\u51fd\u6570\u6982\u5ff5\u5185\u6db5\uff0c\u975e\u5e38\u5bb9\u6613\u5b9e\u73b0\u3002\u8fd9\u91cc\u6211\u4eec\u91c7\u752832\u4f4d\u6d6e\u70b9\u5b9e\u73b0\u51fd\u6570\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000arm_biquad_cascade_df1_f32\u3002\u8be5\u51fd\u6570\u4f4d\u4e8e\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000CMSIS\\<u style=\"color: rgb(51, 51, 51) !important;\">DSP<\/u>\\Source\\FilteringFunctions\\arm_biquad_cascade_df1_init_f32.c<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000CMSIS\\DSP\\Source\\FilteringFunctions\\arm_biquad_cascade_df1_f32.c<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u6211\u4eec\u6765\u770b\u4e00\u770b\u8fd9\u4e2a\u51fd\u6570\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000arm_biquad_cascade_df1_init_f32.c\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933253946-9.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 619px; height: 702px;\" \/><\/p>\n<div class=\"post-image\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933253440-10.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 632px; height: 810px;\" \/><\/div>\n<div class=\"post-image\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933255B5-11.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 600px; height: 900px;\" \/><\/div>\n<p>\t<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933253116-12.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 600px; height: 858px;\" \/><br \/>\n\t&nbsp;<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u5f00\u59cb\u6d4b\u8bd5\uff1a<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; text-align: center; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t<img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933255518-13.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 605px; height: 890px;\" \/><\/p>\n<div class=\"post-image\"><img decoding=\"async\" alt=\"\" src=\"http:\/\/www.szryc.com\/uploads\/allimg\/200331\/0933253420-14.png\" style=\"border: 0px; vertical-align: middle; cursor: pointer; margin: 0px auto; display: block; max-width: 100%; border-radius: 2px; width: 603px; height: 852px;\" \/><\/div>\n<p>\t\uff08\u7f16\u8005\u6ce8\uff1a\u4ee5\u4e0a\u662f\u4e0a\u622a\u56fe\u4e0d\u5b8c\u6574\u90e8\u5206\u7684\u8865\u5145\uff1a\uff09<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000const float iir_coeffs\uff3b5*IIR_SECTION\uff3d={<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u30000.035416141341387819\uff0c2*0.035416141341387819\uff0c0.035416141341387819\uff0c1.7193929141691948\uff0c-0.8610574795347461\uff0c 0.031387100113383172\uff0c2*0.031387100113383172\uff0c0.031387100113383172\uff0c1.5237898734101736\uff0c-0.64933827386370635\uff0c 0.028873109331868367\uff0c2*0.028873109331868367\uff0c0.028873109331868367\uff0c1.4017399331200424\uff0c-0.51723237044751591\uff0c 0.027673522765052503\uff0c2*0.027673522765052503\uff0c0.027673522765052503\uff0c1.3435020629061745\uff0c-0.45419615396638446<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000};<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000static arm_biquad_casd_df1_inst_f32 S;<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\/*\u5047\u5b9a\u91c7\u6837512\u4e2a\u70b9*\/<\/p>\n<p>\t\uff08\u8865\u5145\u5b8c\u6210\uff0c\u63a5\u4e0a\uff09<br \/>\n\t&nbsp;<\/p>\n<p style=\"margin: 0px 0px 12px; 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color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u7b2c\u4e09\u5e45\u56fe\uff0c \u4e3a800Hz \u6df7\u5165\u968f\u673a\u566a\u58f0\u8fc7\u6ee4\u540e\uff0c\u5df2\u7ecf\u5f88\u597d\u7684\u8fd8\u539f\u6709\u7528\u4fe1\u53f7\u9891\u7387<\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; overflow-wrap: break-word; letter-spacing: 0.5px; font-size: 16px; color: rgb(51, 51, 51) !important; line-height: 30px !important; font-family: &quot;Microsoft yahei&quot;, \u5fae\u8f6f\u96c5\u9ed1 !important;\">\n\t\u3000\u3000\u7b2c\u56db\u5e45\u56fe\uff0c \u4e3a800Hz\u4fe1\u53f7\u6df7\u5165\u968f\u673a\u566a\u58f0\uff0c\u540c\u65f6\u53e0\u52a04000Hz\u5e72\u6270\u7684\u6ce2\u5f62\uff0c\u5bf9\u7cfb\u7edf\u800c\u8a00\uff0c\u4ece\u65f6\u57df\u4e2d\uff0c\u660e\u663e\u53ef\u89c1\uff0c\u6709\u7528\u4fe1\u53f7\u5df2\u7ecf\u5b8c\u5168<u>\u626d\u66f2<\/u><\/p>\n<p style=\"margin: 0px 0px 12px; padding: 0px; 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