{"id":3121,"date":"2020-06-24T03:28:00","date_gmt":"2020-06-24T03:28:00","guid":{"rendered":""},"modified":"2020-06-24T11:28:56","modified_gmt":"2020-06-24T03:28:56","slug":"%e7%94%a8%e4%ba%8e%e7%94%b5%e6%9c%ba%e6%8e%a7%e5%88%b6%e7%9a%84%e4%bc%98%e5%8c%96%e2%88%91-%e2%88%86%e8%b0%83%e5%88%b6%e7%94%b5%e6%b5%81%e6%b5%8b%e9%87%8f","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=3121","title":{"rendered":"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf"},"content":{"rendered":"

\n\t\u5728\u9ad8\u6027\u80fd\u7535\u673a\u548c\u4f3a\u670d\u9a71\u52a8\u5668\u4e2d\uff0c\u57fa\u4e8e\u9694\u79bb\u5f0fsigma-delta\uff08Σ-Δ\uff09\u7684\u6a21\u6570\u8f6c\u6362\u5668<\/u>\uff08ADC<\/u>\uff09\u5df2\u6210\u4e3a\u9996\u9009\u7684\u76f8\u7535\u6d41<\/u>\u6d4b\u91cf<\/u>\u65b9\u6cd5\u3002\u8fd9\u4e9b\u8f6c\u6362\u5668\u4ee5\u5176\u5f3a\u5927\u7684\u7535\u6d41\u9694\u79bb\u548c\u5353\u8d8a\u7684\u6d4b\u91cf\u6027\u80fd\u800c\u95fb\u540d\u3002\u968f\u7740\u65b0\u4e00\u4ee3ADC\u7684\u63a8\u51fa\uff0c\u5176\u6027\u80fd\u4e5f\u5728\u4e0d\u65ad\u63d0\u9ad8\uff0c\u4f46\u662f\uff0c\u8981\u5145\u5206\u5229\u7528\u6700\u65b0\u7684ADC\u7684\u529f\u80fd\uff0c\u5c31\u9700\u8981\u5bf9\u5176\u4ed6\u7684\u7535\u673a\u9a71\u52a8\u5668<\/u>\u8fdb\u884c\u76f8\u5e94\u7684\u8bbe\u8ba1\u3002<\/p>\n

\n\t\u7b80\u4ecb<\/p>\n

\n\t <\/div>\n

\n\t\u7535\u673a\u9a71\u52a8\u5668\u5236\u9020<\/u>\u5546\u4e0d\u65ad\u63d0\u9ad8\u5176\u4ea7\u54c1\u7684\u6027\u80fd\u548c\u9c81\u68d2\u6027\u3002\u4e00\u4e9b\u6539\u8fdb\u662f\u901a\u8fc7\u91c7\u7528\u66f4\u5148\u8fdb\u7684\u63a7\u5236\u7b97\u6cd5\u548c\u66f4\u9ad8\u7684\u8ba1\u7b97\u80fd\u529b\u5b9e\u73b0\u7684\u3002\u5176\u4ed6\u6539\u8fdb\u5219\u901a\u8fc7\u6700\u5c0f\u5316\u53cd\u9988\u7535\u8def<\/u>\u4e2d\u7684\u975e\u7406\u60f3\u6548\u5e94\u6765\u5b9e\u73b0\uff0c\u6bd4\u5982\u5ef6\u8fdf\u3001\u503e\u659c\u548c\u6e29\u5ea6\u6f02\u79fb\u3002<\/p>\n

\n\t\u5c31\u7535\u673a\u63a7\u5236\u7b97\u6cd5\u7684\u53cd\u9988\u800c\u8a00\uff0c\u6700\u5173\u952e\u7684\u90e8\u5206\u662f\u76f8\u7535\u6d41\u7684\u6d4b\u91cf\u3002\u968f\u7740\u63a7\u5236\u6027\u80fd\u63d0\u9ad8\uff0c\u7cfb\u7edf\u5bf9\u65f6\u5e8f\u7cbe\u5ea6\u3001\u504f\u79fb\/\u589e\u76ca\u8bef\u5dee\u3001\u591a\u53cd\u9988\u901a\u9053\u7684\u540c\u6b65\u7b49\u975e\u7406\u60f3\u6548\u5e94\u8d8a\u6765\u8d8a\u654f\u611f\u3002\u591a\u5e74\u6765\uff0c\u534a\u5bfc\u4f53\u516c\u53f8\u4e00\u76f4\u81f4\u529b\u4e8e\u51cf\u5c11\u53cd\u9988\u4fe1\u53f7\u94fe\u4e2d\u7684\u8fd9\u4e9b\u975e\u7406\u60f3\u6548\u5e94\uff0c\u800c\u4e14\u8fd9\u79cd\u8d8b\u52bf\u5f88\u53ef\u80fd\u4f1a\u6301\u7eed\u4e0b\u53bb\u3002ADuM7701\u5c31\u662f\u4e3a\u6d4b\u91cf\u76f8\u7535\u6d41\u800c\u4f18\u5316\u7684\u6700\u65b0\u4e00\u4ee3\u9694\u79bb\u5f0fΣ-Δ ADC\u793a\u4f8b\u3002\u867d\u7136ADC\u7684\u6027\u80fd\u5f88\u91cd\u8981\uff0c\u4f46\u4e5f\u5f88\u53ef\u80fd\u5728\u53cd\u9988\u8def\u5f84\u7684\u5176\u4f59\u90e8\u5206\u9020\u6210\u975e\u7406\u60f3\u6548\u5e94\u3002\u672c\u6587\u4e0d\u8003\u8651ADC\uff0c\u4e3b\u8981\u8ba8\u8bba\u53cd\u9988\u8def\u5f84\u7684\u5176\u4f59\u90e8\u5206\u3002\u867d\u7136\u672c\u6587\u7740\u91cd\u4ecb\u7ecd\u7535\u673a\u63a7\u5236\u5e94\u7528\uff0c\u4f46\u5b83\u4e5f\u9002\u7528\u4e8e\u4efb\u4f55\u9700\u8981Σ-Δ ADC\u7d27\u5bc6\u540c\u6b65\u7684\u5176\u4ed6\u7cfb\u7edf\u3002<\/p>\n

\n\t\u4f7f\u7528Σ-Δ ADC\u65f6\u7684\u5178\u578b\u4fe1\u53f7\u94fe\u5982\u56fe1\u6240\u793a\u3002\u6a21\u62df\u8f93\u5165\u7535\u538b\u901a\u8fc7\u8ba9\u76f8\u7535\u6d41\u901a\u8fc7\u4e00\u4e2a\u7535\u963b<\/u>\u5206\u6d41\u5668\u6765\u4ea7\u751f\u3002Σ-Δ ADC\u5c06\u6a21\u62df\u4fe1\u53f7\u8f6c\u6362\u62101\u4f4d\u6570\u636e\u6d41\uff0c\u5e76\u63d0\u4f9b\u7535\u6c14\u9694\u79bb\uff0c\u56e0\u6b64ADC\u4e4b\u540e\u7684\u4e00\u5207\u90fd\u4e0e\u7535\u673a\u76f8\u7535\u4f4d\u9694\u79bb\u3002\u8f6c\u6362\u5668\u4e4b\u540e\u662f\u901a\u8fc7\u6ee4\u6ce2\u65b9\u5f0f\u6267\u884c\u7684\u89e3\u8c03\u3002\u8be5\u6ee4\u6ce2\u5668<\/u>\u5c061\u4f4d\u4fe1\u53f7\u8f6c\u6362\u4e3a\u591a\u4f4d\uff08M\u4f4d\uff09\u4fe1\u53f7\uff0c\u5e76\u901a\u8fc7\u62bd\u53d6\u8fc7\u7a0b\u964d\u4f4e\u6570\u636e\u66f4\u65b0\u901f\u7387\u3002\u867d\u7136\u6ee4\u6ce2\u5668\u62bd\u53d6\u964d\u4f4e\u4e86\u6570\u636e\u901f\u7387\uff0c\u4f46\u901f\u7387\u901a\u5e38\u4ecd\u7136\u8fc7\u9ad8\uff0c\u65e0\u6cd5\u5339\u914d\u63a7\u5236\u7b97\u6cd5\u7684\u66f4\u65b0\u901f\u7387\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u589e\u52a0\u4e86\u6700\u540e\u7684\u964d\u91c7\u6837\u9636\u6bb5\u3002<\/p>\n

\n\t\u672c\u6587\u5047\u8bbe\u6ee4\u6ce2\u5668\u548c\u62bd\u53d6\u7ea7\u5728FPGA<\/u>\u4e2d\u5b9e\u73b0\uff0c\u5e76\u4e14\u6ee4\u6ce2\u5668\u662f\u4e00\u4e2a\u4e09\u9636sinc\u6ee4\u6ce2\u5668\uff08sinc3\uff09\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe1.\u4e00\u79cd\u7528\u4e8e\u6d4b\u91cf\u76f8\u7535\u6d41\u7684∑-\u2206\u4fe1\u53f7\u94fe\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe2.\uff08a\uff09\u6ee4\u6ce2\u5668\u62bd\u53d6\u7387\u4e3a5\u7684sinc\u6ee4\u6ce2\u5668\u8109\u51b2\u54cd\u5e94\u3002\uff08b\uff09Sinc\u6ee4\u6ce2\u5668\u7684\u9636\u8dc3\u54cd\u5e94\u4ee5\u53ca\u4e0e\u8109\u51b2\u54cd\u5e94\u7684\u5173\u7cfb\u3002<\/p>\n

\n\tSinc\u6ee4\u6ce2\u5668\u540c\u6b65<\/strong><\/p>\n

\n\tΣ-Δ ADC\u548csinc\u6ee4\u6ce2\u5668\u7684\u7f3a\u9677\u5728\u4e8e\u5f88\u96be\u5728\u540c\u4e00\u4e2a\u65f6\u57df\u4e2d\u8fdb\u884c\u63a7\u5236\uff0c\u5e76\u4e14\u7f3a\u5c11\u6307\u5b9a\u7684\u91c7\u6837\u65f6\u523b\u30022\u4e0e\u5177\u5907\u4e13\u7528\u7684\u91c7\u6837\u4fdd\u6301\u7535\u8def\u7684\u4f20\u7edfADC\u76f8\u6bd4\uff0c\u8fd9\u4e24\u79cd\u6ee4\u6ce2\u5668\u90fd\u6709\u4e00\u4e9b\u4ee4\u4eba\u62c5\u5fe7\u7684\u5730\u65b9\u3002\u4e0d\u8fc7\u4e5f\u6709\u529e\u6cd5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u5982\u672c\u8282\u6240\u793a\uff0c\u5c06sinc\u6ee4\u6ce2\u5668\u4e0e\u7cfb\u7edf\u7684\u5176\u4f59\u90e8\u5206\u540c\u6b65\uff0c\u5e76\u5728\u9002\u5f53\u7684\u65f6\u523b\u91c7\u6837\u76f8\u7535\u6d41\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u672a\u80fd\u6b63\u786e\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u6d4b\u91cf\u7ed3\u679c\u5c06\u4f1a\u5927\u5e45\u5931\u771f\u3002<\/p>\n

\n\tsinc\u6ee4\u6ce2\u5668\u7684\u8f93\u51fa\u5e76\u4e0d\u4ee3\u8868\u8be5\u65f6\u523bΣ-Δ ADC\u7684\u8f93\u5165\u3002\u76f8\u53cd\uff0c\u8f93\u51fa\u662f\u8fc7\u53bb\u7a97\u53e3\u671f\u95f4\u8f93\u5165\u7684\u52a0\u6743\u5e73\u5747\u503c\u3002\u8fd9\u662f\u7531\u6ee4\u6ce2\u5668\u7684\u8109\u51b2\u54cd\u5e94\u9020\u6210\u7684\u3002\u56fe2a\u663e\u793a\u4e86\u62bd\u53d6\u7387\u4e3a5\u65f6sinc3\u7684\u8109\u51b2\u54cd\u5e94\u3002\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u6ee4\u6ce2\u5668\u8f93\u51fa\u5982\u4f55\u6210\u4e3a\u8f93\u5165\u5e8f\u5217\u7684\u52a0\u6743\u548c\uff0c\u4e2d\u95f4\u7684\u91c7\u6837\u83b7\u5f97\u8f83\u5927\u6743\u91cd\uff0c\u800c\u5e8f\u5217\u5f00\u59cb\/\u7ed3\u675f\u65f6\u7684\u91c7\u6837\u6743\u91cd\u8f83\u4f4e\u3002<\/p>\n

\n\t\u5728\u7ee7\u7eed\u8ba8\u8bba\u4e4b\u524d\uff0c\u9700\u8981\u7ed9\u51fa\u51e0\u4e2a\u57fa\u672c\u5b9a\u4e49\u3002Σ-Δ ADC\u65f6\u949f<\/u>\uff0c\u53c8\u79f0\u4e3a\u8c03\u5236\u5668\u65f6\u949f\uff0c\u8868\u793a\u4e3afmod\u3002\u62bd\u53d6\u7387\uff08DR\uff09\u51b3\u5b9a\u62bd\u53d6\u9891\u7387\uff08fdec\uff09\uff0c\u5e76\u4e0efmod\u5173\u8054\uff0c\u5982\u516c\u5f0f1\u6240\u793a\uff1a<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe2\u53f3\u4fa7\u663e\u793a\u4e86\u8109\u51b2\u54cd\u5e94\u5bf9\u6ee4\u6ce2\u5668\u9636\u8dc3\u54cd\u5e94\u7684\u5f71\u54cd\u3002\u5e94\u7528\u8be5\u6b65\u9aa4\u65f6\uff0c\u6ee4\u6ce2\u5668\u8f93\u51fa\u4e0d\u53d7\u5f71\u54cd\uff0c\u6ee4\u6ce2\u5668\u57283\u4e2a\u5b8c\u6574\u7684\u62bd\u53d6\u5468\u671f\u4e4b\u540e\u8fbe\u5230\u7a33\u5b9a\u72b6\u6001\u3002\u56e0\u6b64\uff0csinc3\u6ee4\u6ce2\u5668\u7684\u4e00\u4e9b\u91cd\u8981\u7279\u6027\u53ef\u4ee5\u8868\u8ff0\u4e3a\uff1a<\/p>\n

\n\t\u7fa4\u5ef6\u8fdf\u4e3a1.5\u4e2a\u62bd\u53d6\u5468\u671f<\/p>\n

\n\t\u5efa\u7acb\u65f6\u95f4\u4e3a3\u4e2a\u62bd\u53d6\u5468\u671f<\/p>\n

\n\t\u5728\u5c06\u6ee4\u6ce2\u5668\u4e0e\u63a7\u5236\u7cfb\u7edf\u540c\u6b65\u65f6\uff0c\u8fd9\u4e9b\u5c5e\u6027\u975e\u5e38\u91cd\u8981\uff0c\u672c\u6587\u5c06\u59cb\u7ec8\u4f1a\u7528\u5230\u3002<\/p>\n

\n\t\u5728\u8ba8\u8bbasinc\u6ee4\u6ce2\u5668\u540c\u6b65\u4e4b\u524d\uff0c\u5fc5\u987b\u5148\u5b9a\u4e49\u8f93\u5165\u4fe1\u53f7\u7684\u7279\u6027\u3002\u8fd9\u53cd\u8fc7\u6765\u53c8\u4f1a\u5b9a\u4e49\u6ee4\u6ce2\u5668\u7684\u540c\u6b65\u7279\u6027\u3002<\/p>\n

\n\t\u56fe3\u663e\u793a\u4e86\u7531\u7535\u538b\u6e90\u9006\u53d8\u5668<\/u>\u9a71\u52a8\u76843\u76f8\u6c38\u78c1\u7535\u673a\u7684\u6a21\u62df\u76f8\u7535\u6d41\u3002\u8c03\u5236\u65b9\u5f0f\u4e3a\u7a7a\u95f4\u77e2\u91cfPWM3\uff0c\u5f00\u5173<\/u>\u9891\u7387\u4e3a10 kHz\u3002\u5c06\u7535\u673a\u52a0\u8f7d\u52305 A\u5cf0\u503c\u76f8\u7535\u6d41\u548c3000 rpm\u8f6c\u901f\u3002\u8fd9\u79cd\u8bbe\u7f6e\u52a0\u4e0a3\u4e2a\u6781\u5bf9\u6570\uff0c\u53ef\u4ee5\u5f97\u52306.67 ms\u7535\u6c14\u57fa\u672c\u5468\u671f\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe3.\u91c7\u7528\u7a7a\u95f4\u77e2\u91cf\u8109\u5bbd\u8c03\u5236\u65f6\u7684\u7535\u673a\u76f8\u7535\u6d41\u3002<\/p>\n

\n\t\u76f8\u7535\u6d41\u53ef\u4ee5\u770b\u4f5c\u7531\u4e24\u4e2a\u5206\u91cf\u7ec4\u6210\uff1a\u5e73\u5747\u5206\u91cf\u548c\u5f00\u5173\u5206\u91cf\u3002\u51fa\u4e8e\u63a7\u5236\u76ee\u7684\uff0c\u4ec5\u5173\u6ce8\u7535\u6d41\u7684\u5e73\u5747\u5206\u91cf\uff0c\u56e0\u6b64\u5fc5\u987b\u5b8c\u5168\u53bb\u9664\u5f00\u5173\u5206\u91cf\u3002\u8981\u63d0\u53d6\u5e73\u5747\u5206\u91cf\uff0c\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u5bf9\u4e0ePWM\u540c\u6b65\u7684\u4fe1\u53f7\uff08\u7528\u4e8e\u7535\u673a\u7ec8\u7aef\uff09\u8fdb\u884c\u91c7\u6837\u3002\u5982\u56fe4\u6240\u793a\u3002\u6700\u4e0a\u9762\u7684\u4fe1\u53f7\u663e\u793a\u76f8\u7535\u6d41\u7684\u5f00\u5173\u6ce2\u5f62\uff0c\u4e2d\u95f4\u7684\u4fe1\u53f7\u663e\u793a\u5bf9\u5e94\u7684\u9006\u53d8\u5668\u76f8\u4f4d\u81c2\u7684\u9ad8\u7aefPWM\uff0c\u6700\u4e0b\u9762\u7684\u4fe1\u53f7\u663e\u793a\u6765\u81eaPWM\u5b9a\u65f6\u5668<\/u>\u7684\u540c\u6b65\u4fe1\u53f7\u3002PWM\u540c\u6b65\u4fe1\u53f7\u5728PWM\u5468\u671f\u7684\u5f00\u59cb\u548c\u4e2d\u95f4\u8fdb\u884c\u7f6e\u4f4d\u3002\u4e3a\u7b80\u660e\u8d77\u89c1\uff0c\u5047\u8bbe\u6240\u6709\u4e09\u76f8\u7684\u5360\u7a7a\u6bd4\u90fd\u662f50%\uff0c\u610f\u5473\u7740\u7535\u6d41\u53ea\u6709\u4e00\u4e2a\u4e0a\u5347\u659c\u5761\u548c\u4e00\u4e2a\u4e0b\u964d\u659c\u5761\u3002\u5728PWM\u540c\u6b65\u4fe1\u53f7\u7684\u4e0a\u5347\u6cbf\uff0c\u7535\u6d41\u53d6\u5176\u5e73\u5747\u503c\uff0c\u56e0\u6b64\u5982\u679c\u6070\u597d\u5728\u90a3\u4e00\u523b\u91c7\u6837\u7535\u6d41\uff0c\u5f00\u5173\u5206\u91cf\u5c06\u88ab\u5b8c\u5168\u6291\u5236\u3002\u5b9e\u9645\u4e0a\uff0c\u91c7\u6837\u4fdd\u6301\u7535\u8def\u76f8\u5f53\u4e8e\u4e00\u4e2a\u5728\u5f00\u5173\u9891\u7387\u4e0a\u5177\u6709\u65e0\u9650\u8870\u51cf\u7684\u6ee4\u6ce2\u5668\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe4.\u5728PWM\u5468\u671f\u7684\u8d77\u59cb\u70b9\u548c\u4e2d\u5fc3\u70b9\u5904\u6d4b\u91cf\u76f8\u7535\u6d41\u4f1a\u51cf\u5f31\u7535\u6d41\u7eb9\u6ce2\u3002<\/p>\n

\n\t\u56fe5\u663e\u793a\u4e86\u5c06\u8fd9\u79cd\u91c7\u6837\u5e94\u7528\u4e8e\u56fe3\u4e2d\u6240\u793a\u6ce2\u5f62\u65f6\u7684\u7ed3\u679c\u3002\u53f3\u4fa7\u6240\u793a\u662f\u5b9e\u9645\u76f8\u7535\u6d41\u548c\u91c7\u6837\u7535\u6d41\u7684\u6ce2\u5f62\u653e\u5927\u56fe\u3002\u6ce8\u610f\u91c7\u6837\u4fdd\u6301\u8fc7\u7a0b\u5982\u4f55\u5b8c\u5168\u6d88\u9664\u7eb9\u6ce2\u3002<\/p>\n

\n\t\u91c7\u6837\u7535\u6d41\u4ee5\u6bcf\u5355\u4f4d\u8868\u793a\uff0c\u5176\u4e2d0 A\u6620\u5c04\u52300.5\uff0c\u5168\u6bd4\u4f8b\u503c\u4e3a8 A\u3002\u9009\u62e9\u8fd9\u4e2a\u6bd4\u4f8b\u662f\u4e3a\u4e86\u66f4\u5bb9\u6613\u4e0e\u540e\u9762\u7684∑-\u2206\u6d4b\u91cf\u503c\u8fdb\u884c\u6bd4\u8f83\u3002\u56fe5\u6240\u793a\u7684\u7ed3\u679c\u4e3a\u7406\u60f3\u573a\u666f\uff0c\u91c7\u6837\u540e\u53ea\u5269\u4e0b\u57fa\u6ce2\u5206\u91cf\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u6570\u636e\u5f53\u505a\u6bd4\u8f83∑-\u2206\u6d4b\u91cf\u503c\u7684\u57fa\u51c6\u503c\u3002<\/p>\n

\n\t∑-\u2206\u6d4b\u91cf\u548c\u6df7\u53e0<\/strong><\/p>\n

\n\t\u5728\u7406\u60f3\u7684\u91c7\u6837\u4fdd\u6301ADC\u4e2d\uff0c\u7531\u4e8e\u4e25\u683c\u63a7\u5236\u91c7\u6837\u65f6\u523b\uff0c\u6240\u4ee5\u80fd\u591f\u63d0\u53d6\u57fa\u6ce2\u5206\u91cf\u3002\u7136\u800c\uff0cΣ-\u2206\u8f6c\u6362\u662f\u4e00\u4e2a\u8fde\u7eed\u7684\u91c7\u6837\u8fc7\u7a0b\uff0c\u7eb9\u6ce2\u5206\u91cf\u5c06\u4e0d\u53ef\u907f\u514d\u5730\u6210\u4e3a\u6d4b\u91cf\u7684\u4e00\u90e8\u5206\u3002<\/p>\n

\n\t\u5728Σ-\u2206\u8f6c\u6362\u4e2d\uff0c\u62bd\u53d6\u7387\u4e0e\u4fe1\u566a\u6bd4\uff08SNR\uff09\u4e4b\u95f4\u5b58\u5728\u5bc6\u5207\u8054\u7cfb\u3002\u62bd\u53d6\u7387\u8d8a\u9ad8\uff0c\u8f93\u51fa\u7684\u6709\u6548\u4f4d\u6570\uff08ENOB\uff09\u8d8a\u591a\u3002\u7f3a\u70b9\u662f\uff0c\u968f\u7740\u62bd\u53d6\u7387\u589e\u52a0\uff0c\u7fa4\u5ef6\u8fdf\u4e5f\u4f1a\u589e\u52a0\uff0c\u56e0\u6b64\u8bbe\u8ba1\u8005\u5fc5\u987b\u5728\u4fe1\u53f7\u5206\u8fa8\u7387\u548c\u53cd\u9988\u94fe\u7684\u5ef6\u8fdf\u4e4b\u95f4\u6298\u4e2d\u8003\u91cf\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u4e0e\u63a7\u5236\u5468\u671f\u76f8\u6bd4\uff0c\u5e94\u5c06\u5ef6\u8fdf\u4fdd\u6301\u5728\u8f83\u5c0f\u8303\u56f4\u3002\u5bf9\u4e8e\u7535\u673a\u63a7\u5236\uff0c\u5178\u578b\u7684\u62bd\u53d6\u7387\u5728128\u5230256\u4e4b\u95f4\uff0c\u8fd9\u53ef\u4ee5\u5f88\u597d\u5730\u5e73\u8861\u4fe1\u566a\u6bd4\u548c\u7fa4\u5ef6\u8fdf\u3002<\/p>\n

\n\t\u5728\u6570\u636e\u624b\u518c\u89c4\u8303\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528256\u4f5c\u4e3a\u62bd\u53d6\u7387\u3002\u4f8b\u5982\uff0cADuM7701\u7684ENOB\u4e3a14\u4f4d\uff0c\u62bd\u53d6\u7387\u4e3a256\u3002ENOB\u503c\u5982\u6b64\u9ad8\u65f6\uff0c\u9884\u8ba1\u53ef\u4ee5\u5f97\u5230\u975e\u5e38\u51c6\u786e\u7684\u6d4b\u91cf\u7ed3\u679c\u3002\u4e3a\u4e86\u9a8c\u8bc1\u8fd9\u4e00\u70b9\uff0c\u5047\u8bbe\u56fe3\u6240\u793a\u7684\u76f8\u7535\u6d41\u662f\u91c7\u7528Σ-Δ ADC\u572820 MHz\u65f6\u6d4b\u91cf\u6240\u5f97\uff0c\u6570\u636e\u6d41\u5219\u7531\u4f7f\u7528256\u62bd\u53d6\u7387\u7684sinc3\u8fdb\u884c\u89e3\u8c03\u3002\u7ed3\u679c\u5982\u56fe6a\u6240\u793a\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe5.\u7406\u60f3\u7684\u76f8\u7535\u6d41\u91c7\u6837\uff1a\uff08a\uff09\u7406\u60f3\u7684\u91c7\u6837\u76f8\u7535\u6d41\u7684\u57fa\u6ce2\u5468\u671f\uff0c\uff08b\uff09\u76f8\u7535\u6d41\u548c\u91c7\u6837\u76f8\u7535\u6d41\u7684\u6ce2\u5f62\u653e\u5927\u56fe\u3002<\/p>\n

\n\t\"\u7528\u4e8e\u7535\u673a\u63a7\u5236\u7684\u4f18\u5316\u2211-\u2206\u8c03\u5236\u7535\u6d41\u6d4b\u91cf\"<\/p>\n

\n\t\u56fe6.\uff08a\uff09sinc\u6ee4\u6ce2\u5668\u7684\u8f93\u51fa\u3002\uff08B\uff09\u5b9e\u9645\u7684\u76f8\u7535\u6d41\u548csinc\u6ee4\u6ce2\u5668\u62bd\u53d6\u8f93\u51fa\u7684\u6ce2\u5f62\u653e\u5927\u56fe\u3002<\/p>\n

\n\t\"\"<\/p>\n

\n\t\u56fe7.\uff08a\uff09sinc\u6ee4\u6ce2\u5668\u7684\u91c7\u6837\u8f93\u51fa\u3002\uff08b\uff09\u6d4b\u91cf\u8bef\u5dee\u3002<\/p>\n

\n\t\u76f8\u7535\u6d41\u7684\u57fa\u6ce2\u5206\u91cf\u975e\u5e38\u660e\u663e\uff0c\u4f46\u4e0e\u56fe5a\u6240\u793a\u7684\u7406\u60f3\u91c7\u6837\u76f8\u6bd4\uff0c\u6d4b\u91cf\u4fe1\u53f7\u5b58\u5728\u5f88\u5927\u7684\u566a\u58f0\u3002\u56e0\u6b64\uff0c\u867d\u7136ADC\u548csinc\u6ee4\u6ce2\u5668\u672c\u8eab\u63d0\u4f9b\u4e86\u4e0d\u9519\u7684ENOB\u6570\u91cf\uff0c\u4f46\u53cd\u9988\u4fe1\u53f7\u7684\u8d28\u91cf\u5374\u5f88\u5dee\u3002\u4ece\u56fe6b\u53ef\u4ee5\u770b\u51fa\u5176\u539f\u56e0\uff0c\u8be5\u56fe\u662fsinc\u6ee4\u6ce2\u5668\u8f93\u51fa\u548c\u5b9e\u9645\u7684\u76f8\u7535\u6d41\u7684\u6ce2\u5f62\u653e\u5927\u56fe\u3002\u6ce8\u610f\u76f8\u7535\u6d41\u768410 kHz\u5f00\u5173\u5206\u91cf\u662f\u5982\u4f55\u53d1\u751f\u76f8\u79fb\uff0c\u4ee5\u53ca\u51e0\u4e4e\u672a\u88absinc\u6ee4\u6ce2\u5668\u8870\u51cf\u3002\u73b0\u5728\uff0c\u5047\u8bbe\u5728\u6bcf\u4e2aPWM\u5468\u671f\u6267\u884c\u4e00\u6b21\u7535\u673a\u63a7\u5236\u7b97\u6cd5\uff0c\u5e76\u5728\u5468\u671f\u5f00\u59cb\u65f6\u8bfb\u53d6\u6700\u65b0\u7684sinc\u6ee4\u6ce2\u5668\u8f93\u51fa\u3002\u5b9e\u9645\u4e0a\uff0csinc\u6ee4\u6ce2\u5668\u7684\u8f93\u51fa\u4f1a\u5411\u4e0b\u91c7\u6837\uff0c\u4ee5\u5339\u914d\u63a7\u5236\u7b97\u6cd5\u7684\u66f4\u65b0\u901f\u7387\u3002\u5411\u4e0b\u91c7\u6837\u548c\u5f97\u5230\u7684\u4fe1\u53f7\u5728\u56fe6b\u4e2d\u663e\u793a\u4e3a\u91c7\u6837sinc\u8f93\u51fa\u3002\u56fe7a\u663e\u793a\u4e86\u6309\u7167PWM\u901f\u7387\u6ee4\u6ce2\u548c\u91c7\u6837\u7684\u6574\u4e2a\u57fa\u6ce2\u5468\u671f\u7684\u7ed3\u679c\u3002<\/p>\n

\n\t\u5f88\u660e\u663e\uff0c\u76f8\u7535\u6d41\u6d4b\u91cf\u5931\u771f\u4e25\u91cd\uff0c\u56e0\u6b64\u63a7\u5236\u6027\u80fd\u4f1a\u975e\u5e38\u5dee\u3002\u5982\u6b64\uff0c\u5e94\u8be5\u589e\u52a0\u626d\u77e9\u6ce2\u7eb9\uff0c\u5e76\u4e14\u9700\u8981\u964d\u4f4e\u7535\u6d41\u63a7\u5236\u73af\u8def\u7684\u5e26\u5bbd\u3002\u4ece\u7406\u60f3\u6d4b\u91cf\u503c\uff08\u56fe5a\uff09\u4e2d\u51cf\u53bb\u56fe7a\u4e2d\u7684\u6d4b\u91cf\u503c\uff0c\u5c31\u53ef\u4ee5\u5f97\u5230\u8bef\u5dee\uff08\u56fe7b\uff09\u3002\u8bef\u5dee\u7ea6\u4e3a\u539f\u6bd4\u4f8b\u4fe1\u53f7\u76847%\uff0c\u4e0e\u9884\u671f\u768414 ENOB\u76f8\u5dee\u751a\u8fdc\u3002<\/p>\n

\n\t\u8fd9\u4e2aΣ-Δ\u6d4b\u91cf\u548c\u6df7\u53e0\u573a\u666f\u6f14\u793a\u4e86\u57fa\u4e8eΣ-Δ\u7684\u975e\u5e38\u5e38\u89c1\u7684\u7535\u6d41\u6d4b\u91cf\u6a21\u5f0f\uff0c\u4ee5\u53ca\u5b83\u662f\u5982\u4f55\u5f15\u5bfc\u8bbe\u8ba1\u4eba\u5458\u5f97\u51fa“Σ-Δ ADC\u4e0d\u9002\u5408\u7535\u673a\u9a71\u52a8\u5668”\u8fd9\u4e2a\u7ed3\u8bba\u7684\u3002\u4f46\u662f\uff0c\u8fd9\u4e2a\u793a\u4f8b\u5e76\u6ca1\u6709\u663e\u793a\u51faADC\u672c\u8eab\u7684\u7cdf\u7cd5\u6027\u80fd\u3002\u76f8\u53cd\uff0c\u56e0\u4e3a\u672a\u80fd\u6b63\u786e\u8bbe\u7f6e\u76f8\u7535\u6d41\u6d4b\u91cf\u503c\uff0c\u6240\u4ee5\u4f59\u4e0b\u4fe1\u53f7\u94fe\u7684\u6027\u80fd\u6b20\u4f73\u3002<\/p>\n

\n\tADC\u5728\u51e0\u5146\u8d6b\uff08\u4e00\u822c\u4e3a10 MHz\u81f320 MHz\uff09\u4e0b\u5bf9\u8f93\u5165\u4fe1\u53f7\u91c7\u6837\uff0c\u5728\u62bd\u53d6\u7387\u4e3a256\u65f6\uff0csinc\u6ee4\u6ce2\u5668\u6709\u6548\u53bb\u9664\u8c03\u5236\u566a\u58f0\u3002\u5728\u5982\u6b64\u9ad8\u7684\u91c7\u6837\u7387\u4e0b\uff0c\u6ee4\u6ce2\u5668\u8f93\u51fa\u4e2d\u5b58\u5728\u76f8\u7535\u6d41\u7eb9\u6ce2\u5206\u91cf\uff0c\u5728\u4fe1\u53f7\u94fe\u7684\u5411\u4e0b\u91c7\u6837\u7ea7\uff0c\u8fd9\u53ef\u80fd\u6210\u4e3a\u4e00\u4e2a\u95ee\u9898\uff08\u89c1\u56fe1\uff09\u3002\u5982\u679c\u7eb9\u6ce2\u5206\u91cf\u6ca1\u6709\u5145\u5206\u8870\u51cf\uff0c\u4e14\u7535\u673a\u63a7\u5236\u7b97\u6cd5\u4ee5PWM\u901f\u5ea6\u6d88\u8017\u7535\u6d41\u53cd\u9988\uff0c\u5219\u7ed3\u679c\u4f1a\u56e0\u4e3a\u964d\u91c7\u6837\u800c\u4ea7\u751f\u6df7\u53e0\u3002<\/p>\n

\n\t\u6839\u636e\u6807\u51c6\u91c7\u6837\u7406\u8bba\uff0c\u4e3a\u4e86\u907f\u514d\u6df7\u53e0\uff0c\u4fe1\u53f7\u5728\u4e00\u534a\u91c7\u6837\u9891\u7387\u4ee5\u4e0a\u65f6\u5fc5\u987b\u65e0\u80fd\u91cf\u3002\u5982\u679c\u5bf9Σ-Δ ADC\u8f93\u51fa\u5411\u4e0b\u91c7\u6837\u81f310 kHz\uff0c\u90a3\u4e485 kHz\u6216\u66f4\u9ad8\u9891\u7387\u4e0b\u7684\u566a\u58f0\u5c06\u4f1a\u6df7\u53e0\u5230\u6d4b\u91cf\u503c\u4e2d\u3002\u5982\u56fe\u6240\u793a\uff0c\u5728sinc\u6ee4\u6ce2\u5668\u4e4b\u540e\uff0c\u4fe1\u53f7\u4e2d\u8fd8\u5b58\u5728\u5927\u91cf10 kHz\u5f00\u5173\u566a\u58f0\u3002\u964d\u4f4e10 kHz\u566a\u58f0\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u589e\u52a0\u62bd\u53d6\u7387\uff0c\u4f46\u662f\u8fd9\u6837\u505a\u4f1a\u5bfc\u81f4\u4e0d\u53ef\u63a5\u53d7\u7684\u957f\u65f6\u95f4\u7fa4\u5ef6\u8fdf\u3002\u6211\u4eec\u9700\u8981\u91c7\u7528\u4e00\u79cd\u4e0d\u540c\u7684\u65b9\u6cd5\u3002<\/p>\n

\n\t\u901a\u8fc7\u540c\u6b65\u6539\u5584\u6d4b\u91cf<\/p>\n

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\n\t\"\"<\/p>\n

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\n\t\"\"<\/p>\n

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\n\t\"\"<\/p>\n

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\n\t\"\"<\/p>\n

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\n\t\"\"<\/p>\n

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