{"id":2968,"date":"2020-03-13T08:04:21","date_gmt":"2020-03-13T08:04:21","guid":{"rendered":""},"modified":"2020-03-13T16:05:07","modified_gmt":"2020-03-13T08:05:07","slug":"%e6%b5%85%e8%b0%88%e7%bb%bf%e5%85%89%e6%bf%80%e5%85%89%e5%99%a8%e7%9a%84%e4%ba%a7%e7%94%9f%e5%8f%8a%e5%85%b6%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2968","title":{"rendered":"\u6d45\u8c08\u7eff\u5149\u6fc0\u5149\u5668\u7684\u4ea7\u751f\u53ca\u5176\u5e94\u7528"},"content":{"rendered":"

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\n\t\u56fe 3 \u5b9e\u9645\u7535\u538b\u8f6c\u7535\u6d41\u539f\u7406\u56fe\u53ca\u7b49\u6548\u539f\u7406\u56fe<\/p>\n

\n\t\u4e0a\u56fe\u53f3\u56fe\u4e2d\uff0c\u628aQ1\u7528\u7b49\u6548\u6a21\u578b\u66ff\u4ee3\u540e\uff0c\u53ef\u4ee5\u5f88\u6e05\u695a\u5730\u770b\u5230\uff0c\u7535\u8def\u662f\u6709\u7b2c\u4e8c\u4e2a\u6781\u70b9\u7684\uff0c\u6781\u70b9\u7684\u4f4d\u7f6e\u5982\u4e0b\u3002<\/p>\n

\n\t\"\u4e09\u6b65\u5b8c\u6574\u5b9e\u73b0\u8fd0\u653e\u8d1f\u53cd\u9988\u7535\u8def\u7a33\u5b9a\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t\u4ece\u7a33\u5b9a\u6027\u800c\u8a00\uff0c\u672c\u7535\u8def\u8981\u89e3\u51b3\u4e24\u4e2a\u95ee\u9898\uff0c\u4e00\u4e3a\u521d\u6b65\u786e\u5b9a\u7b2c\u4e8c\u6781\u70b9P2\u7684\u4f4d\u7f6e\uff0c\u4ece\u4e0a\u8ff0\u516c\u5f0f\u53ef\u4ee5\u770b\u5230\uff0c\u56e0\u4e3aRbe\u662f\u4e09\u6781\u7ba1β\u3001Vbe\uff08on\uff09\u7684\u51fd\u6570\uff0c\u4e5f\u662fIo\u7684\u51fd\u6570\uff0cβ\u548cVbe\uff08on\uff09\u53ef\u4ee5\u901a\u8fc7\u4e09\u6781\u7ba1\u7684\u6570\u636e\u624b\u518c\u67e5\u5230\uff0c\u4f46\u662f\u4e24\u4e2a\u53c2\u6570\u90fd\u4e0d\u662f\u552f\u4e00\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u53ef\u4ee5\u8003\u8651\u6700\u4e25\u9177\u7684\u60c5\u51b5\uff0c\u5373\u4e09\u6781\u7ba1β\u3001Vbe\uff08on\uff09\u53d6\u6700\u5927\u503c\uff0c\u800cIo\u53d6\u6700\u5c0f\u503c\uff0c\u8fd9\u6837Rbe\u5e94\u5f53\u8fdc\u5927\u4e8eRL\uff0cP2\u57fa\u672c\u7531RL\u4e0eCL\u51b3\u5b9a\u30020~20mA\u8f93\u51fa\u963b\u6027\u8d1f\u8f7d\u4e00\u822c\u4e0d\u4f1a\u5927\u4e8e1KΩ\uff0c\u5c31\u4ee5\u6700\u5927\u503c1KΩ\u8ba1\u7b97\uff0c\u90a3\u4e48\u5f97\u5230\u8fd9\u4e2a\u7535\u8def\u6700\u9760\u8fd1\u4f4e\u9891\u7684P2\u5927\u81f4\u4e3a1\/\uff082*π*RL*CL\uff09 = 3.4Khz\u3002<\/p>\n

\n\t\u7b2c\u4e8c\u4e2a\u95ee\u9898\u662f\u6d88\u9664\u7b2c\u4e8c\u4e2a\u6781\u70b9\u5e26\u6765\u76f8\u79fb-180°\u7684\u5f71\u54cd\u3002\u6839\u636eAOL\u6ce2\u7279\u56fe\u66f2\u7ebf\u4e0e1\/F\u6ce2\u7279\u56fe\u66f2\u7ebf\u5173\u7cfb\u7684\u4e0d\u540c\uff0c\u6709\u591a\u79cd\u76f8\u9002\u5e94\u7684\u65b9\u6cd5\u8fdb\u884c\u7a33\u5b9a\u6027\u8bbe\u8ba1\uff0c\u5982\u5728AOL\u7b2c\u4e8c\u4e2a\u6781\u70b9\u4e4b\u540e\u4ea7\u751f\u4e00\u4e2a\u96f6\u70b9\uff0c\u6216\u8005\u4f7f1\/F\u5728\u8fdc\u5c0f\u4e8eAOL\u7b2c\u4e8c\u4e2a\u6781\u70b9\u9891\u7387\u5904\u4ea7\u751f\u4e00\u4e2a\u96f6\u70b9\uff0c\u62ac\u9ad81\/F\uff0c\u7136\u540e\u518d\u4ea7\u751f\u4e00\u4e2a\u6781\u70b9\uff0c\u4f7f\u4e4b\u4e0eAOL\u5728-20dB\/10\u500d\u9891\u7684\u659c\u7387\u5904\u76f8\u4ea4\uff0c\u7b49\u7b49\u3002\u8fd9\u91cc\u56e0\u4e3a\u5df2\u77e5P2\u5f88\u5c0f\uff0c\u63a8\u8350\u4f7f\u7528\u57281\/F\u66f2\u7ebf\u4e0a\u76f4\u63a5\u4ea7\u751f\u4e00\u4e2a\u6781\u70b9\uff0c\u4f7f\u5176\u4e0eAOL\u66f2\u7ebf\u76f8\u4ea4\u65f6\uff0c\u5dee\u503c\u4e3a-40dB\/10-\uff08-20dB\/10\uff09\uff0c\u8fd9\u6837\u4ecd\u7136\u662f-20dB\/10\u500d\u9891\u7684\u901f\u5ea6\u3002\u5148\u7b97\u51fa1\/F\u7684\u8868\u8fbe\u5f0f\uff0c\u5982\u4e0b\uff1a<\/p>\n

\n\t\"\u4e09\u6b65\u5b8c\u6574\u5b9e\u73b0\u8fd0\u653e\u8d1f\u53cd\u9988\u7535\u8def\u7a33\u5b9a\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t\u90a3\u4e48\u4ea7\u751f\u6781\u70b9\u7684\u65b9\u6cd5\u4e3a\u5728R4\u4e0a\u5e76\u8054\u4e00\u4e2a\u7535\u5bb9<\/u>\u3002<\/p>\n

\n\t\"\u4e09\u6b65\u5b8c\u6574\u5b9e\u73b0\u8fd0\u653e\u8d1f\u53cd\u9988\u7535\u8def\u7a33\u5b9a\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t\u56fe 4 \u7a33\u5b9a\u6027\u8bbe\u8ba1\u539f\u7406\u56fe<\/p>\n

\n\t\u5e76\u8054\u7535\u5bb9C1\u540e\uff0c1\/F\u7684\u6781\u70b9\u9891\u7387\u516c\u5f0f\u4e3a\uff1a<\/p>\n

\n\t\"\u4e09\u6b65\u5b8c\u6574\u5b9e\u73b0\u8fd0\u653e\u8d1f\u53cd\u9988\u7535\u8def\u7a33\u5b9a\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t1\/F\u7684\u6781\u70b9\u539f\u5219\u4e0a\u5728AOL\u7684\u6781\u70b9P2\u523010\u500d\u7684P2\u4e4b\u95f4\uff0c\u56e0\u4e3aR4=100KΩ\uff0cAOL\u7684\u6781\u70b9P2\u4e3a3.4Khz\uff0c\u8fd9\u6837\u7b97\u51fa\u6765C1\u7684\u8303\u56f4\u5927\u81f4\u572847pF~470pF\u4e4b\u95f4\u3002<\/p>\n

\n\t3\u8fd0\u653e\u7a33\u5b9a\u6027\u4eff\u771f\u8bc4\u4f30<\/h2>\n

\n\t\u5f88\u591a\u7684\u7535\u5b50\u7535\u8def\uff0c\u5176\u5b9e\u5e76\u4e0d\u4e25\u683c\u9700\u8981\u4eff\u771f\u6765\u6a21\u62df\uff0c\u56e0\u4e3a\u7406\u8bba\u8ba1\u7b97\u6216\u8005\u7ecf\u9a8c\u5df2\u7ecf\u628a\u6027\u80fd\u6478\u5f97\u5f88\u900f\u3002\u4f46\u662f\u632f\u8361\u7684\u7279\u6027\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u5c31\u5982\u7a33\u5b9a\u7684\u72b6\u6001\u53ea\u6709\u4e00\u79cd\uff0c\u4f46\u662f\u4e0d\u7a33\u5b9a\u7684\u72b6\u6001\u53ef\u80fd\u6709\u5343\u4e07\u79cd\u3002\u4eff\u771f\u6a21\u62df\u5c31\u662f\u89e3\u51b3\u8fd9\u79cd\u4e0d\u786e\u5b9a\u6027\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u540c\u65f6\uff0c\u5728\u7a33\u5b9a\u6027\u5206\u6790\u65b9\u9762\uff0c\u4eff\u771f\u6a21\u62df\u8fd8\u6709\u4ee5\u4e0b\u4f18\u52bf\u3002<\/p>\n

\n\tØ\u4e3a\u7406\u8bba\u5206\u6790\u628a\u5173<\/p>\n

\n\t\u7ecf\u8fc7\u7406\u8bba\u5206\u6790\uff0c\u8bbe\u8ba1\u8005\u5e94\u5f53\u6709\u4e00\u79cd\u731c\u60f3\uff0c\u5c31\u662f\u5927\u6982\u5230\u4ec0\u4e48\u9891\u6bb5\uff0c\u5982\u679c\u6ca1\u6709\u5bfc\u5165\u7a33\u5b9a\u6027\u8bbe\u8ba1\uff0c\u5219\u7cfb\u7edf\u4f1a\u632f\u8361\u3002\u4eff\u771f\u6a21\u62df\u901a\u8fc7\u53cd\u63a8\u7684\u65b9\u5f0f\u6765\u8bc1\u660e\u7406\u8bba\u5206\u6790\u7684\u6b63\u786e\u6027\u3002\u5982\u672c\u7535\u538b\u8f6c\u7535\u6d41\u7684\u7535\u8def\uff0c\u5982\u679c\u7b2c\u4e8c\u6781\u70b9\u9891\u7387\u4e3a3.4Khz\uff0c\u5219\u4ece3.4Khz \u523034Khz\u53ca\u4ee5\u4e0a\uff0c\u76f8\u79fb\u4f1a\u9010\u6b65\u589e\u5927\u76f4\u5230-180°\uff0c\u5f15\u8d77\u632f\u8361\u3002\u800c\u5b9e\u9645\u4e0a\uff0c\u5728\u4e00\u5b9a\u6761\u4ef6\u4e0b\u672c\u7535\u8def\u786e\u5b9e\u5728\u4f4e\u4e8e34Khz\u65f6\u5c31\u6709\u632f\u8361\u4ea7\u751f\u3002<\/p>\n

\n\t\"\u4e09\u6b65\u5b8c\u6574\u5b9e\u73b0\u8fd0\u653e\u8d1f\u53cd\u9988\u7535\u8def\u7a33\u5b9a\u6027\u8bbe\u8ba1\"<\/p>\n

\n\t\u56fe 5 \u632f\u8361\u4eff\u771f\u6ce2\u5f62\u56fe<\/p>\n

\n\tØ\u4e3a\u5173\u952e\u5668\u4ef6\u9009\u578b<\/u>\u63d0\u4f9b\u4f9d\u636e<\/p>\n

\n\t\u7406\u8bba\u5206\u6790\u4e2d\uff0c\u867d\u7136\u91c7\u7528\u6a21\u578b\u5316\u3001\u53c2\u6570\u5316\u7684\u65b9\u5f0f\u89e3\u91ca\u4e86\u4e00\u4e9b\u666e\u904d\u7684\u9053\u7406\uff0c\u4f46\u5b9e\u9645\u771f\u7684\u5c31\u4e0e\u7406\u8bba\u4e25\u4e1d\u5408\u7f1d\u5417\uff0c\u6050\u6015\u4e0d\u89c1\u5f97\u3002\u7406\u8bba\u5206\u6790\u4e2d\uff0c\u4e3a\u4e86\u7b80\u5316\u8d77\u89c1\uff0c\u5e38\u5e38\u5148\u6293\u4e3b\u8981\u6a21\u578b\uff0c\u4e3b\u8981\u53c2\u6570\uff0c\u6709\u4e00\u4e9b\u53c2\u6570\u56e0\u6b64\u88ab\u5ffd\u7565\u3002\u5982\u672c\u4f8b\u4e2d\uff0c\u8fd0\u7b97\u653e\u5927\u5668AOL\u548c\u53cd\u9988\u7cfb\u6570\u5012\u65701\/F\u7684\u5b9e\u9645\u66f2\u7ebf\u653e\u5728\u4e86\u6b21\u8981\u4f4d\u7f6e\uff0c\u800c\u4e09\u6781\u7ba1\u7684β\u3001Vbe\uff08on\uff09\u53c2\u6570\u4e5f\u7b80\u5316\u800c\u88ab\u5ffd\u7565\u3002<\/p>\n

\n\t\u800c\u6700\u7ec8\uff0c\u6211\u4eec\u603b\u8981\u4ece\u79cd\u7c7b\u7e41\u591a\u7684\u8fd0\u653e\u548c\u4e09\u6781\u7ba1\u4e2d\u9009\u51fa\u4e00\u4e2a\u578b\u53f7\u6765\u4e3a\u4ea7\u54c1\u6240\u7528\uff0c\u53bb\u7814\u7a76\u6570\u636e\u624b\u518c\u8bda\u7136\u4e0d\u9519\uff0c\u4f46\u62b1\u6b49\u7684\u662f\uff0c\u8fd9\u4e9b\u53c2\u6570\u5bf9\u7a33\u5b9a\u6027\u5206\u6790\u5230\u5e95\u4f1a\u5e26\u6765\u591a\u5927\u8bef\u5dee\uff0c\u8fd8\u662f\u672a\u77e5\u6570\u3002\u4eff\u771f\u5c31\u662f\u5728\u8fd9\u4e9b\u4ea7\u54c1\u4e2d\u52a0\u4e86\u4e00\u628a\u7b5b\u5b50\uff0c\u53ea\u6709\u4e0d\u88ab\u7a33\u5b9a\u6027\u6307\u6807\u6f0f\u4e0b\u53bb\u7684\u624d\u662f\u53ef\u9009\u9879\u3002<\/p>\n

\n\tØ\u4e3a\u6539\u5584\u65b9\u6848\u9009\u62e9\u6700\u4f18\u5316\u53c2\u6570<\/p>\n

\n\t\u63d0\u51fa\u4eff\u771f\u8bc4\u4f30\u7684\u5fc5\u8981\u6027\uff0c\u53e6\u4e00\u76ee\u7684\u662f\u4e3a\u7406\u8bba\u96be\u4ee5\u5206\u6790\u6216\u8005\u8fc7\u4e8e\u590d\u6742\u7684\u5730\u65b9\u505a\u5fc5\u8981\u7684\u8865\u5145\u3002\u8fd0\u653e\u7a33\u5b9a\u6027\u7684\u4eff\u771f\u4e0e\u4e00\u822c\u4fe1\u53f7\u4f20\u8f93\u7684\u4eff\u771f\u8fd8\u662f\u6709\u4e9b\u4e0d\u540c\uff0c\u5b83\u4e0d\u80fd\u4ec5\u662f\u628aSPI<\/u>CE\u6a21\u578b\u8c03\u51fa\u6765\u800c\u5df2\uff0c\u800c\u5e94\u5f53\u8981\u8003\u8651\u5230\u4e00\u4e9bPCB\u677f\u7ea7\u7684\u56e0\u7d20\uff0c\u6bd4\u5982\u8981\u8003\u8651\u5206\u5e03\u53c2\u6570\u7684\u5f71\u54cd\u3002\u8fd0\u653e\u8f93\u5165\u8f93\u51fa\u5f15\u811a\u4e0a\u7684\u5206\u5e03\u963b\u6297\u3001\u5206\u5e03\u7535\u5bb9\u53ef\u80fd\u4f1a\u4ea7\u751f\u989d\u5916\u7684\u96f6\u3001\u6781\u70b9\uff0c\u7535\u7f06<\/u>\u957f\u5ea6\u7684\u4e0d\u540c\uff0c\u9020\u6210\u9644\u52a0\u8d1f\u8f7d\u7535\u5bb9\u7684\u53d8\u5316\uff0c\u4e5f\u4f1a\u5f71\u54cd\u7b2c\u4e8c\u6781\u70b9\u7684\u4f4d\u7f6e\u3002\u5b9e\u4f8b\u4e2d\uff0c\u7ecf\u8fc7\u4eff\u771f\uff0c\u5728\u8003\u8651\u8fd0\u653e\u5f15\u811a\u5206\u5e03\u7535\u5bb9\u76f4\u523020pF\uff0c\u8f93\u51fa\u8d1f\u8f7d\u7535\u5bb9\u589e\u52a0\u52301uF\uff0c\u8fd0\u653e\u9009\u7528LM224\uff0c\u4e09\u6781\u7ba1\u9009\u75282SC3613\uff0c\u5728C1=100pF\u7684\u60c5\u51b5\u4e0b\uff0c\u7cfb\u7edf\u80fd\u591f\u7a33\u5b9a\u7684\u5de5\u4f5c\u3002<\/p>\n

\n\t4\u8fd0\u653e\u7a33\u5b9a\u6027\u6d4b\u8bd5\u9a8c\u8bc1<\/h2>\n

\n\t\u5b9e\u9645\u7684\u4ea7\u54c1\uff0c\u8fd8\u5305\u542b\u4e86\u5143\u5668\u4ef6<\/u>\u8d28\u91cf\u56e0\u7d20\u3001\u4e0d\u540c\u5382\u5bb6\u56e0\u7d20\u3001\u751f\u4ea7\u56e0\u7d20\u3001\u4e0e\u5176\u4ed6\u4ea7\u54c1\u63a5\u53e3<\/u>\u7b49\u5404\u73af\u8282\uff0c\u901a\u8fc7\u5b9e\u6d4b\u6765\u76d6\u68fa\u5b9a\u8bba\uff0c\u8fd9\u5bf9\u4efb\u4f55\u53c2\u6570\u90fd\u662f\u516c\u5e73\u7684\u3002\u5b9e\u6d4b\u7684\u53e6\u5916\u4e00\u4e2a\u4f18\u52bf\u662f\u53ef\u4ee5\u91c7\u53d6\u591a\u79cd\u7ec4\u5408\u6d4b\u8bd5\uff0c\u52a0\u4e25\u6d4b\u8bd5\u6761\u4ef6\u3002\u5982\u672c\u4f8b\u4e2d\u9664\u4e86\u5728\u5e38\u6e29\u4e0b\u6d4b\u8bd5\uff0c\u8fd8\u53ef\u4ee5\u5728\u9ad8\u3001\u4f4e\u6e29\u4e0b\uff0c\u52a0\u5927\u5bb9\u6027\u8d1f\u8f7d\u6761\u4ef6\u4e0b\uff0c\u5728\u6ee1\u8d1f\u8f7d\u6216\u8005\u7528\u6237\u7aef\u77ed\u8def<\/u>\u7684\u60c5\u51b5\u4e0b\u6d4b\u91cf<\/u>\u662f\u5426\u8fd8\u6709\u632f\u8361\u7684\u60c5\u51b5\u53d1\u751f\uff0c\u800c\u9a8c\u8bc1\u8bbe\u8ba1\u88d5\u91cf\u7684\u5145\u8db3\u6027\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6d89\u53ca\u5230\u7a33\u5b9a\u6027\uff0c\u5373\u4f7f\u662f\u76f4\u6d41\u6a21\u62df\u91cf\u9886\u57df\uff0c\u6d4b\u8bd5\u5de5\u5177\u4e5f\u4e0d\u4ec5\u9650\u4e8e\u4e07\u7528\u8868<\/u>\uff0c\u800c\u66f4\u5e94\u5f53\u7528\u793a\u6ce2\u5668<\/u>\u53bb\u770b\u770b\u4fe1\u53f7\u7684\u5b9e\u9645\u6ce2\u5f62\u3002<\/p>\n

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