{"id":10267,"date":"2022-10-10T20:32:50","date_gmt":"2022-10-10T12:32:50","guid":{"rendered":"http:\/\/www.szryc.com\/?p=10267"},"modified":"2022-10-10T20:32:50","modified_gmt":"2022-10-10T12:32:50","slug":"%e4%bb%8b%e7%bb%8d%e4%b8%80%e4%b8%8b%e8%bf%90%e6%94%be%e7%94%b5%e8%b7%af%e5%85%b1%e6%a8%a1%e6%8a%91%e5%88%b6%e6%af%94cmrr","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=10267","title":{"rendered":"\u4ecb\u7ecd\u4e00\u4e0b\u8fd0\u653e\u7535\u8def\u5171\u6a21\u6291\u5236\u6bd4CMRR"},"content":{"rendered":"

\u6458\u8981<\/strong><\/p>\n

\u672c\u6587\u4ecb\u7ecd\u4e86\u8fd0\u653e\u7535\u8def\u5171\u6a21\u6291\u5236\u6bd4CMRR\u7684\u6982\u5ff5\uff0c\u5206\u4e3a\u8fd0\u653e\u5668\u4ef6\u81ea\u8eab\u7684CMRR\uff0c\u8fd8\u6709\u4e0e\u5916\u90e8\u7535\u963b\u642d\u914d\u5728\u4e00\u8d77\u65f6\uff0c\u6574\u4f53\u7535\u8def\u7684CMRR\u8ba1\u7b97\u65b9\u6cd5\u3002\u76ee\u7684\u662f\u4e3a\u4e86\u53cd\u6620\u51fa\u8fd0\u653e\u5668\u4ef6\u81ea\u8eab\u7684CMRR\u503c\u662f\u5982\u4f55\u5f71\u54cd\u6700\u7ec8\u6574\u4f53\u7535\u8def\u7684CMRR\u503c\uff0c\u8fd8\u6709\u4ee5\u5dee\u5206\u653e\u5927\u7535\u8def\u4e3a\u4f8b\uff0c\u9610\u8ff0\u5916\u90e8\u7684\u7535\u963b\u5339\u914d\u7a0b\u5ea6\u5bf9\u6574\u4f53\u7535\u8defCMRR\u5f71\u54cd\u7684\u7a0b\u5ea6\u3002<\/p>\n

\u5f88\u591a\u7528\u6237\u5bf9\u8fd0\u653e\u5668\u4ef6\u81ea\u8eab\u7684CMRR\u503c\u6bd4\u8f83\u5728\u610f\uff0c\u5b9e\u9645\u4e0a\u5728\u5916\u90e8\u7535\u963b\u7cbe\u5ea6\u53ea\u67091%\u6216\u8005\u66f4\u5dee\u65f6\uff0c\u8fd0\u653e\u5668\u4ef6\u81ea\u8eabCMRR\u503c\u5bf9\u7535\u8def\u6574\u4f53CMRR\u503c\u7684\u964d\u4f4e\u7a0b\u5ea6\u5df2\u7ecf\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u4e86\u3002\u6587\u4e2d\u8fd8\u4ee5\u4eff\u771f<\/u>\u8f6f\u4ef6\u4e3a\u4f8b\uff0c\u8fd0\u7528CMRR\u5b9a\u4e49\u7684\u65b9\u6cd5\u6765\u6d4b\u8bd5\u7535\u8def\u6574\u4f53\u7684CMRR\uff0c\u5f97\u51fa\u672c\u6587\u4ecb\u7ecd\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e0e\u5b9e\u6d4b\u503c\u975e\u5e38\u543b\u5408\u7684\u7ed3\u8bba\u3002\u6b64\u65b9\u6cd5\u5bf9\u5b9e\u9645\u7535\u8def\u7684\u6d4b\u8bd5\u975e\u5e38\u5177\u6709\u6307\u5bfc\u610f\u4e49\uff0c\u53ef\u4ee5\u6bd4\u8f83\u51c6\u786e\u6d4b\u91cf\u7535\u8def\u7684CMRR\u503c\u3002<\/p>\n

\u5f15\u8a00<\/strong><\/p>\n

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\u672c\u6587\u6863\u901a\u8fc7\u7406\u8bba\u8ba1\u7b97\u548c\u4eff\u771f\u8bc1\u660e\u6240\u63d0\u4f9b\u7684\u8ba1\u7b97\u65b9\u6cd5\u975e\u5e38\u51c6\u786e\u6709\u6548\uff0c\u53ef\u4ee5\u5e2e\u52a9\u8bbe\u8ba1\u8005\u5feb\u901f\u4e86\u89e3\u7535\u8def\u7684\u6574\u4f53CMRR\u6c34\u5e73\u3002<\/p>\n

\u5171\u6a21\u6291\u5236\u6bd4CMRR\u7684\u5b9a\u4e49<\/strong><\/p>\n

\u5171\u6a21\u6291\u5236\u6bd4\uff0c\u5b9a\u4e49\u4e3a\u7535\u8def\u4e2d\u5dee\u6a21\u589e\u76ca\u4e0e\u5171\u6a21\u589e\u76ca\u7684\u6bd4\u503c\uff0c\u5176\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n

\"9c4b9338-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u4e00\u822c\u7528\u5bf9\u6570\u5f62\u5f0f\u6765\u8868\u8ff0\uff0c\u5b9a\u4e49\u4e3a<\/p>\n

\"9c6c9f42-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u5171\u6a21\u7535\u538b\u4e0e\u5dee\u6a21\u7535\u538b\u63a5\u5165\u7535\u8def\u793a\u610f\u56fe\u89c1 Figure 1\uff1a<\/p>\n

\"9c88210e-4883-11ed-a3b6-dac502259ad0\"<\/div>\n


\nFigure 1\u5171\u6a21\u7535\u538b\u4e0e\u5dee\u6a21\u7535\u538b\u793a\u610f\u56fe<\/strong><\/p>\n

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\"9c99738c-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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\u5dee\u5206\u653e\u5927\u7535\u8def\u7684\u5171\u6a21\u6291\u5236\u6bd4<\/strong><\/p>\n

CMRR<\/strong>\u8ba1\u7b97\u65b9\u6cd5<\/strong><\/p>\n

\u975e\u7406\u60f3\u8fd0\u653e\u7531\u4e8e\u5171\u6a21\u6291\u5236\u6bd4CMRR\u6709\u9650\uff0c\u4f4e\u9891\u5904CMRR\u503c\u4e00\u822c\u670980dB\u4ee5\u4e0a\uff0c\u518d\u52a0\u4e0a\u5916\u90e84\u4e2a\u7535\u963b\u7684\u8bef\u5dee\uff0c\u5dee\u5206\u653e\u5927\u7535\u8def\u6574\u4f53\u7684CMRR\u503c\u4f1a\u4e0b\u964d\u3002\u5178\u578b\u7684\u5dee\u5206\u653e\u5927\u7535\u8def\u56fe\u5982 Figure 2\uff1a<\/p>\n

\"9cbbaa38-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\nFigure 2\u5178\u578b\u7684\u5dee\u5206\u653e\u5927\u7535\u8def\u56fe<\/strong><\/p>\n

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\"9ce16818-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u7b2c\u4e8c\u6b65\u518d\u8ba1\u7b97<\/p>\n

\"9cf6cf5a-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u7b2c\u4e09\u6b65\u8ba1\u7b97<\/p>\n

\"9d085720-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

1)\u8ba1\u7b97\u7535\u8def\u6574\u4f53Acm_total<\/strong><\/p>\n

\"9d20df0c-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

Figure 3\u5bf9\u5171\u6a21\u7535\u538b\u7684\u5dee\u5206\u653e\u5927\u7535\u8def\u56fe<\/strong><\/p>\n

\"9d3ac124-4883-11ed-a3b6-dac502259ad0\"\"9d5fb182-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u6839\u636e\u516c\u5f0f( 2-1)\uff0c\u6709<\/p>\n

\"9d7f136a-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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\"9da01786-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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\"9df1273e-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

2)\u8ba1\u7b97\u7535\u8def\u6574\u4f53Ad<\/u>m_total<\/strong><\/p>\n

\"9e1f0618-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

Figure 4\u5bf9\u5dee\u6a21\u7535\u538b\u7684\u5dee\u5206\u653e\u5927\u7535\u8def\u56fe<\/strong><\/p>\n

\"9e2f9730-4883-11ed-a3b6-dac502259ad0\"\"9e4a21a4-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u6839\u636e\u516c\u5f0f( 2-1)\uff0c\u6709<\/p>\n

\"9e64d7e2-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\n\u7ecf\u8fc7\u4e00\u7cfb\u5217\u5408\u5e76\u540c\u7c7b\u9879\u548c\u5316\u7b80\u540e\uff0c\u5f97\u51fa\uff1a<\/p>\n

\"9e86b920-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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\"9ebf2738-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

3)\u8ba1\u7b97\u7535\u8def\u6574\u4f53<\/strong>CMRR<\/strong>total<\/strong><\/p>\n

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\n4)\u8ba1\u7b97\u7531\u7535\u963b\u503c\u8bef\u5dee\u5f15\u8d77\u7684CMRRtotal<\/strong><\/p>\n

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\u8bbe R1=G\u00d7R\u00d7(1+K),R2=R\u00d7(1-K)\uff0cR3=R\u00d7(1+K) \uff0cR4=G\u00d7R\u00d7(1-K) \uff0c<\/p>\n

\u6b64\u65f6\u75314\u4e2a\u7535\u963b\u5f15\u8d77\u7684\u4e0d\u5e73\u8861\u7a0b\u5ea6\u662f\u6700\u5927\u7684\u3002<\/p>\n

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\"9f30b704-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\nFigure 5\u53d8\u66f4\u540e\u5bf9\u5171\u6a21\u7535\u538b\u7684\u5dee\u5206\u653e\u5927\u5668<\/u>\u7535\u8def\u56fe<\/strong><\/p>\n

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\"9f41e7fe-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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\"9f5a7aee-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

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5)\u8ba1\u7b97\u4efb\u610f\u8f93\u5165\u7535\u538b\u4e0b\u7684\u8f93\u51fa\u7535\u538b\u00a0<\/strong>(\u672c\u8282\u5185\u5bb9\u4e0eCMRR\u8ba1\u7b97\u65e0\u5173\uff0c\u4ec5\u4e3a\u5c55\u793a\u8ba1\u7b97Vout )<\/p>\n

\"9f75ad82-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\nFigure 6\u5bf9\u4e0d\u540c\u8f93\u5165\u7535\u538b\u7684\u5dee\u5206\u653e\u5927\u7535\u8def\u56fe<\/strong><\/p>\n

\u6839\u636e\u516c\u5f0f( 2-1)\uff0c\u5f97\u51fa\uff1a<\/p>\n

\"9f8e3032-4883-11ed-a3b6-dac502259ad0\"\"9fad5f8e-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u5176\u4e2dAOL\u662f\u8fd0\u653e\u7684\u5f00\u73af\u589e\u76caCMRROPA\u662f\u8fd0\u653e\u5668\u4ef6\u81ea\u8eab\u7684\u5171\u6a21\u6291\u5236\u6bd4,Vos\u662f\u8fd0\u653e\u7684\u5931\u8c03\u7535\u538b\u3002<\/p>\n

\u6b64\u516c\u5f0f\u53ef\u4ee5\u7528\u4e8e\u51c6\u786e\u8ba1\u7b97\u4e24\u4e2a\u8f93\u5165\u7535\u538bV1\u3001V2\u4e0b\u8f93\u51fa\u7684\u7535\u538b\u3002<\/p>\n

\u4eff\u771f\u9a8c\u8bc1<\/strong><\/p>\n

\u4e3e\u4f8b\u9a8c\u8bc1 Figure 7 \u7535\u8def\u4e2d\uff0cG= 10\uff0ck=1%\uff0c\u7535\u8def\u6574\u4f53\u7684CMRR\u503c\u3002<\/p>\n

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\u6839\u636e\u516c\u5f0f (3-6)\uff0c\u8ba1\u7b97CMRRtotal<\/p>\n

\"9ff6596e-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\u5bf9\u6570\u5f62\u5f0f\u4e3a<\/p>\n

\"a02742e0-4883-11ed-a3b6-dac502259ad0\"<\/div>\n

\n2)\u4eff\u771f\u9a8c\u8bc1\u7535\u8def\u7684\u5171\u6a21\u6291\u5236\u6bd4CMRRtotal<\/strong><\/p>\n

\u4eff\u771f\u8f6f\u4ef6\u4e2d\u8bbe\u7f6eVos=3mV\uff0cAOL=200k\uff0cCMRROPA=100dB<\/p>\n

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Figure 7\u9a8c\u8bc1\u7535\u8def\u8f93\u5165Vcm=1V\u65f6\u7684\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n

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Figure 8\u9a8c\u8bc1\u7535\u8def\u8f93\u5165 Vcm=11V\u65f6\u7684\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n

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Figure 9\u9a8c\u8bc1\u7535\u8def\u8f93\u5165Vdm=10mV \u65f6\u7684\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n

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Figure 10\u9a8c\u8bc1\u7535\u8def\u8f93\u5165Vdm=20mV \u65f6\u7684\u8f93\u51fa\u7535\u538b<\/strong><\/p>\n

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