{"id":64491,"date":"2023-11-03T12:50:59","date_gmt":"2023-11-03T04:50:59","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=64491"},"modified":"2023-11-03T12:51:09","modified_gmt":"2023-11-03T04:51:09","slug":"gmyzbkzms","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/64491.html","title":{"rendered":"\u5171\u6a21\u6291\u5236\u6bd4kcmr\u600e\u4e48\u7b97\uff1f"},"content":{"rendered":"\n<p>\u3000\u3000<strong>\u5171\u6a21\u6291\u5236\u6bd4(Common Mode Rejection Ratio\uff0c\u7b80\u79f0CMRR)<\/strong>\u662f\u8861\u91cf\u7535\u5b50\u8bbe\u5907\u6291\u5236\u5171\u6a21\u5e72\u6270\u80fd\u529b\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\u3002\u5728\u7535\u8def\u8bbe\u8ba1\u548c\u4fe1\u53f7\u5904\u7406\u9886\u57df\uff0c\u8ba1\u7b97CMRR\u662f\u975e\u5e38\u91cd\u8981\u7684\u5de5\u4f5c\u3002\u672c\u6587\u5c06\u4ecb\u7ecdCMRR\u7684\u5b9a\u4e49\u3001\u8ba1\u7b97\u65b9\u6cd5\u4ee5\u53ca\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f5c\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e00\u3001\u4ec0\u4e48\u662f\u5171\u6a21\u6291\u5236\u6bd4(CMRR)?<\/h2>\n\n\n\n<p>\u3000\u3000<strong>\u5171\u6a21\u6291\u5236\u6bd4\u662f\u4e00\u79cd\u7528\u6765\u5ea6\u91cf\u5dee\u6a21\u4fe1\u53f7\u589e\u76ca\u4e0e\u5171\u6a21\u4fe1\u53f7\u589e\u76ca\u4e4b\u95f4\u6bd4\u503c\u7684\u6307\u6807\u3002\u5b83\u8868\u793a\u7535\u5b50\u8bbe\u5907\u5728\u5dee\u6a21\u4fe1\u53f7\u8f93\u5165\u65f6\uff0c\u5bf9\u5171\u6a21\u4fe1\u53f7\u7684\u6291\u5236\u80fd\u529b\u3002<\/strong>CMRR\u8d8a\u9ad8\uff0c\u8bf4\u660e\u8bbe\u5907\u5bf9\u5171\u6a21\u5e72\u6270\u7684\u6291\u5236\u80fd\u529b\u8d8a\u5f3a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e8c\u3001\u5171\u6a21\u6291\u5236\u6bd4(CMRR)\u7684\u8ba1\u7b97\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u3000\u3000\u8ba1\u7b97CMRR\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4e24\u79cd\uff1a\u7406\u8bba\u8ba1\u7b97\u548c\u5b9e\u9645\u6d4b\u8bd5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u7406\u8bba\u8ba1\u7b97\u65b9\u6cd5\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000CMRR\u7684\u7406\u8bba\u8ba1\u7b97\u65b9\u6cd5\u662f\u901a\u8fc7\u7535\u8def\u7684\u53c2\u6570\u548c\u7406\u8bba\u6a21\u578b\u6765\u8fdb\u884c\u8ba1\u7b97\u3002\u4ee5\u4e0b\u662f\u4e00\u79cd\u5e38\u7528\u7684\u8ba1\u7b97\u516c\u5f0f\uff1a<\/p>\n\n\n\n<p>\u3000\u3000<strong>CMRR = 20log10(Adm\/Acm)<\/strong><\/p>\n\n\n\n<p>\u3000\u3000\u5176\u4e2d\uff0cAdm\u8868\u793a\u5dee\u6a21\u589e\u76ca\uff0cAcm\u8868\u793a\u5171\u6a21\u589e\u76ca\u3002\u8fd9\u4e2a\u516c\u5f0f\u662f\u57fa\u4e8e\u7406\u60f3\u60c5\u51b5\u4e0b\u7684\u8ba1\u7b97\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u521d\u6b65\u7684\u53c2\u8003\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u5b9e\u9645\u6d4b\u8bd5\u65b9\u6cd5\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5b9e\u9645\u6d4b\u8bd5\u662f\u901a\u8fc7\u5b9e\u9a8c\u6d4b\u91cf\u7684\u65b9\u5f0f\u6765\u8ba1\u7b97CMRR\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3000\u3000a. \u65bd\u52a0\u4e00\u4e2a\u5dee\u6a21\u4fe1\u53f7\uff0c\u4f7f\u5176\u8f93\u5165\u5230\u88ab\u6d4b\u8bbe\u5907\u4e2d\u3002<\/li>\n\n\n\n<li>\u3000\u3000b. \u65bd\u52a0\u4e00\u4e2a\u76f8\u540c\u7684\u5171\u6a21\u4fe1\u53f7\uff0c\u4f7f\u5176\u8f93\u5165\u5230\u88ab\u6d4b\u8bbe\u5907\u4e2d\u3002<\/li>\n\n\n\n<li>\u3000\u3000c. \u6d4b\u91cf\u8f93\u51fa\u4fe1\u53f7\u7684\u5dee\u6a21\u5206\u91cf\u548c\u5171\u6a21\u5206\u91cf\u3002<\/li>\n\n\n\n<li>\u3000\u3000d. \u8ba1\u7b97CMRR\uff1aCMRR = 20log10(\u5dee\u6a21\u5206\u91cf\/\u5171\u6a21\u5206\u91cf)\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u4e09\u3001\u5171\u6a21\u6291\u5236\u6bd4(CMRR)\u7684\u5e94\u7528<\/h2>\n\n\n\n<p>\u3000\u3000CMRR\u5728\u7535\u5b50\u8bbe\u5907\u7684\u8bbe\u8ba1\u548c\u5e94\u7528\u4e2d\u5177\u6709\u91cd\u8981\u7684\u4f5c\u7528\uff0c\u4e3b\u8981\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30001. \u6291\u5236\u5171\u6a21\u5e72\u6270\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000CMRR\u9ad8\u7684\u8bbe\u5907\u80fd\u591f\u6709\u6548\u6291\u5236\u5171\u6a21\u5e72\u6270\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7684\u8d28\u91cf\u548c\u51c6\u786e\u6027\u3002\u5728\u6a21\u62df\u4fe1\u53f7\u5904\u7406\u548c\u4f20\u8f93\u4e2d\uff0c\u5171\u6a21\u5e72\u6270\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u95ee\u9898\u3002\u901a\u8fc7\u63d0\u9ad8\u8bbe\u5907\u7684CMRR\uff0c\u53ef\u4ee5\u964d\u4f4e\u5171\u6a21\u5e72\u6270\u5bf9\u4fe1\u53f7\u7684\u5f71\u54cd\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30002. \u63d0\u9ad8\u4fe1\u53f7\u7684\u7a33\u5b9a\u6027\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000\u5171\u6a21\u6291\u5236\u6bd4\u9ad8\u7684\u8bbe\u5907\u80fd\u591f\u6709\u6548\u6291\u5236\u5171\u6a21\u566a\u58f0\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7684\u7a33\u5b9a\u6027\u3002\u5728\u9ad8\u7cbe\u5ea6\u6d4b\u91cf\u548c\u4eea\u5668\u8bbe\u5907\u4e2d\uff0c\u4fe1\u53f7\u7684\u7a33\u5b9a\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u901a\u8fc7\u63d0\u9ad8\u8bbe\u5907\u7684CMRR\uff0c\u53ef\u4ee5\u51cf\u5c11\u5171\u6a21\u566a\u58f0\u5bf9\u4fe1\u53f7\u7684\u5f71\u54cd\uff0c\u63d0\u9ad8\u4fe1\u53f7\u7684\u7a33\u5b9a\u6027\u548c\u51c6\u786e\u6027\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u3000\u30003. \u4fdd\u62a4\u8bbe\u5907\u5b89\u5168\uff1a<\/h3>\n\n\n\n<p>\u3000\u3000CMRR\u9ad8\u7684\u8bbe\u5907\u80fd\u591f\u6709\u6548\u6291\u5236\u5171\u6a21\u7535\u538b\u7684\u5f71\u54cd\uff0c\u4fdd\u62a4\u8bbe\u5907\u7684\u5b89\u5168\u3002\u5728\u5de5\u4e1a\u63a7\u5236\u548c\u7535\u529b\u7cfb\u7edf\u4e2d\uff0c\u5171\u6a21\u7535\u538b\u53ef\u80fd\u4f1a\u5bf9\u8bbe\u5907\u4ea7\u751f\u635f\u5bb3\u3002\u901a\u8fc7\u63d0\u9ad8\u8bbe\u5907\u7684CMRR\uff0c\u53ef\u4ee5\u51cf\u5c11\u5171\u6a21\u7535\u538b\u5bf9\u8bbe\u5907\u7684\u5f71\u54cd\uff0c\u4fdd\u62a4\u8bbe\u5907\u7684\u5b89\u5168\u8fd0\u884c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u3000\u3000\u56db\u3001\u603b\u7ed3<\/h2>\n\n\n\n<p>\u3000\u3000<strong>\u5171\u6a21\u6291\u5236\u6bd4(CMRR)\u662f\u8861\u91cf\u7535\u5b50\u8bbe\u5907\u6291\u5236\u5171\u6a21\u5e72\u6270\u80fd\u529b\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\u3002\u672c\u6587\u4ecb\u7ecd\u4e86CMRR\u7684\u5b9a\u4e49\u3001\u8ba1\u7b97\u65b9\u6cd5\u4ee5\u53ca\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u4f5c\u7528\u3002<\/strong>\u901a\u8fc7\u63d0\u9ad8\u8bbe\u5907\u7684CMRR\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u7684\u8d28\u91cf\u3001\u7a33\u5b9a\u6027\u548c\u8bbe\u5907\u7684\u5b89\u5168\u6027\u3002\u5728\u7535\u8def\u8bbe\u8ba1\u548c\u4fe1\u53f7\u5904\u7406\u4e2d\uff0c\u5408\u7406\u8ba1\u7b97\u548c\u63d0\u9ad8CMRR\u662f\u975e\u5e38\u91cd\u8981\u7684\u5de5\u4f5c\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5171\u6a21\u6291\u5236\u6bd4\u662f\u4e00\u79cd\u7528\u6765\u5ea6\u91cf\u5dee\u6a21\u4fe1\u53f7\u589e\u76ca\u4e0e\u5171\u6a21\u4fe1\u53f7\u589e\u76ca\u4e4b\u95f4\u6bd4\u503c\u7684\u6307\u6807\u3002\u5b83\u8868\u793a\u7535\u5b50\u8bbe\u5907\u5728\u5dee\u6a21\u4fe1\u53f7\u8f93\u5165\u65f6\uff0c\u5bf9\u5171\u6a21\u4fe1\u53f7\u7684\u6291\u5236\u80fd\u529b\u3002CMRR\u8d8a\u9ad8\uff0c\u8bf4\u660e\u8bbe\u5907\u5bf9\u5171\u6a21\u5e72\u6270\u7684\u6291\u5236\u80fd\u529b\u8d8a\u5f3a<\/p>\n","protected":false},"author":1,"featured_media":48454,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[176],"class_list":["post-64491","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-dzgc"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/64491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=64491"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/64491\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/48454"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=64491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=64491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=64491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}