{"id":486,"date":"2026-10-09T18:42:51","date_gmt":"2026-10-09T10:42:51","guid":{"rendered":"https:\/\/ezblog.cn\/?p=486"},"modified":"2026-10-09T18:42:51","modified_gmt":"2026-10-09T10:42:51","slug":"kt-c-%e5%99%aa%e5%a3%b0","status":"publish","type":"post","link":"https:\/\/ezblog.cn\/?p=486","title":{"rendered":"kT\/C \u566a\u58f0"},"content":{"rendered":"<p>\u5373\u4f7f\u8f93\u5165\u7535\u538b\u4fdd\u6301\u4e0d\u53d8\uff0c\u7535\u8def\u7684\u8f93\u51fa\u4e5f\u4e0d\u4f1a\u5b8c\u5168\u9759\u6b62\u3002\u5668\u4ef6\u5185\u90e8\u7684\u968f\u673a\u8fc7\u7a0b\u4f1a\u8ba9\u7535\u538b\u548c\u7535\u6d41\u4ea7\u751f\u7ec6\u5c0f\u7684\u6ce2\u52a8\uff0c\u8fd9\u5c31\u662f\u566a\u58f0\uff08Noise\uff09\u3002\u4fe1\u53f7\u8d8a\u5fae\u5f31\uff0c\u8fd9\u4e9b\u6ce2\u52a8\u5c31\u8d8a\u5bb9\u6613\u63a9\u76d6\u6211\u4eec\u771f\u6b63\u60f3\u6d4b\u7684\u53d8\u5316\u3002<\/p>\n<p>\u7406\u89e3\u566a\u58f0\uff0c\u53ef\u4ee5\u6293\u4f4f\u4e24\u4e2a\u95ee\u9898\uff1a\u5b83\u4ece\u54ea\u91cc\u6765\uff0c\u7ecf\u8fc7\u7535\u8def\u4e4b\u540e\u8fd8\u5269\u591a\u5c11\u3002<\/p>\n<h2>\u566a\u58f0\u4ece\u54ea\u91cc\u6765<\/h2>\n<p>\u70ed\u566a\u58f0\uff08Thermal Noise\uff09\u6765\u81ea\u8f7d\u6d41\u5b50\u7684\u70ed\u8fd0\u52a8\u3002\u5373\u4f7f\u6ca1\u6709\u5916\u52a0\u7535\u538b\uff0c\u7535\u963b\u91cc\u4e5f\u6709\u70ed\u566a\u58f0\uff1bMOS \u7ba1\u7684\u5bfc\u7535\u6c9f\u9053\u540c\u6837\u4f1a\u4ea7\u751f\u8fd9\u7c7b\u6ce2\u52a8\u3002<\/p>\n<p>\u6563\u7c92\u566a\u58f0\uff08Shot Noise\uff09\u4e0e\u7535\u8377\u7684\u79bb\u6563\u6027\u548c\u968f\u673a\u8f93\u8fd0\u6709\u5173\u3002\u5c31\u50cf\u5e73\u5747\u6d41\u91cf\u7a33\u5b9a\u7684\u96e8\uff0c\u96e8\u6ef4\u4e5f\u4e0d\u4f1a\u6bcf\u4e00\u523b\u90fd\u5747\u5300\u843d\u4e0b\u3002\u4e8c\u6781\u7ba1\u4e2d\u7684\u7535\u6d41\u5c31\u6709\u7c7b\u4f3c\u7684\u968f\u673a\u8d77\u4f0f\u3002<\/p>\n<p>\u95ea\u70c1\u566a\u58f0\uff08Flicker Noise\uff09\uff0c\u4e5f\u53eb 1\/f \u566a\u58f0\uff0c\u5728\u4f4e\u9891\u4e0b\u66f4\u660e\u663e\u3002MOS \u7ba1\u4e2d\u7535\u8377\u88ab\u4fd8\u83b7\u4e0e\u91ca\u653e\u7684\u8fc7\u7a0b\uff0c\u4f1a\u4f7f\u7535\u6d41\u7f13\u6162\u6f02\u79fb\uff0c\u56e0\u6b64\u6d4b\u91cf\u76f4\u6d41\u548c\u4f4e\u9891\u5c0f\u4fe1\u53f7\u65f6\u5c24\u5176\u8981\u7559\u610f\u5b83\u3002<\/p>\n<p>\u767d\u566a\u58f0\uff08White Noise\uff09\u63cf\u8ff0\u7684\u662f\u9891\u8c31\u8fd1\u4f3c\u5e73\u5766\u8fd9\u4e00\u7279\u5f81\uff0c\u800c\u4e0d\u662f\u53e6\u4e00\u79cd\u4ea7\u751f\u673a\u5236\u3002\u5728\u5e38\u7528\u7684\u5206\u6790\u9891\u6bb5\u5185\uff0c\u70ed\u566a\u58f0\u548c\u6563\u7c92\u566a\u58f0\u901a\u5e38\u90fd\u53ef\u4ee5\u6309\u767d\u566a\u58f0\u6765\u5904\u7406\u3002<\/p>\n<h2>\u8c31\u5bc6\u5ea6\u548c\u603b\u566a\u58f0<\/h2>\n<p>\u566a\u58f0\u529f\u7387\u8c31\u5bc6\u5ea6\uff08Power Spectral Density\uff0cPSD\uff09\u63cf\u8ff0\u566a\u58f0\u5728\u9891\u7387\u4e0a\u7684\u5206\u5e03\u3002\u5bf9\u7535\u538b\u566a\u58f0\u800c\u8a00\uff0c\u5b83\u7684\u5355\u4f4d\u662f V\u00b2\/Hz\uff0c\u8868\u793a\u5355\u4f4d\u5e26\u5bbd\u5185\u7535\u538b\u6ce2\u52a8\u5747\u65b9\u503c\u7684\u5927\u5c0f\u3002<\/p>\n<p>\u4f46\u67d0\u4e2a\u9891\u7387\u4e0a\u8c31\u5bc6\u5ea6\u4f4e\uff0c\u5e76\u4e0d\u4ee3\u8868\u6574\u4e2a\u7535\u8def\u7684\u566a\u58f0\u4e00\u5b9a\u5c0f\u3002\u7535\u8def\u4f1a\u8ba9\u4e00\u4e9b\u9891\u7387\u901a\u8fc7\u3001\u538b\u4f4e\u53e6\u4e00\u4e9b\u9891\u7387\uff0c\u6700\u7ec8\u8981\u628a\u5404\u9891\u6bb5\u7684\u8d21\u732e\u5408\u5728\u4e00\u8d77\u3002<\/p>\n<p>\u53ef\u4ee5\u628a\u566a\u58f0\u8c31\u60f3\u8c61\u6210\u4e00\u7247\u8d77\u4f0f\u7684\u5730\u5f62\uff1a\u8c31\u5bc6\u5ea6\u662f\u9ad8\u5ea6\uff0c\u603b\u566a\u58f0\u7684\u5747\u65b9\u503c\u5bf9\u5e94\u66f2\u7ebf\u4e0b\u65b9\u7684\u9762\u79ef\u3002\u53ea\u770b\u9ad8\u5ea6\u3001\u4e0d\u770b\u8986\u76d6\u591a\u5bbd\uff0c\u5c31\u65e0\u6cd5\u5224\u65ad\u603b\u91cf\u3002<\/p>\n<p>\u628a\u603b\u5747\u65b9\u503c\u5f00\u5e73\u65b9\uff0c\u5c31\u5f97\u5230\u5747\u65b9\u6839\u566a\u58f0\uff08Root Mean Square\uff0cRMS\uff09\u3002\u5b83\u4e0e\u4fe1\u53f7\u7535\u538b\u5355\u4f4d\u76f8\u540c\uff0c\u66f4\u65b9\u4fbf\u6bd4\u8f83\u4fe1\u53f7\u662f\u5426\u4f1a\u88ab\u566a\u58f0\u6df9\u6ca1\u3002<\/p>\n<h2>\u4e3a\u4ec0\u4e48\u4f1a\u5f97\u5230 kT\/C<\/h2>\n<p>\u8003\u8651\u4e00\u4e2a\u6700\u7b80\u5355\u7684\u7535\u8def\uff1a\u7535\u538b\u6e90\u901a\u8fc7\u7535\u963b R \u7ed9\u7535\u5bb9 C \u5145\u7535\u3002\u5373\u4f7f\u8f93\u5165\u7a33\u5b9a\uff0c\u7535\u963b\u7684\u70ed\u566a\u58f0\u4ecd\u4f1a\u4e0d\u65ad\u6270\u52a8\u7535\u5bb9\u4e0a\u7684\u7535\u538b\u3002<\/p>\n<p>\u7535\u5bb9\u7ecf\u7535\u963b\u5145\u653e\u7535\u9700\u8981\u65f6\u95f4\uff0c\u56e0\u6b64\u5f88\u5feb\u7684\u7535\u538b\u8d77\u4f0f\u4f1a\u88ab\u524a\u5f31\u3002\u5145\u5206\u5efa\u7acb\u3001\u8fbe\u5230\u70ed\u5e73\u8861\u4e4b\u540e\uff0c\u7535\u5bb9\u7535\u538b\u4ecd\u5728\u968f\u673a\u6ce2\u52a8\uff0c\u53ea\u662f\u6ce2\u52a8\u7684\u7edf\u8ba1\u5927\u5c0f\u7a33\u5b9a\u4e86\u4e0b\u6765\uff1a<\/p>\n<div>\n<math display=\"block\" xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><mo>\u27e8<\/mo><msubsup><mi>v<\/mi><mi>n<\/mi><mn>2<\/mn><\/msubsup><mo>\u27e9<\/mo><mo>=<\/mo><mfrac><mrow><mi>k<\/mi><mi>T<\/mi><\/mrow><mi>C<\/mi><\/mfrac><mo>,<\/mo><mo>&nbsp;&nbsp;<\/mo><msub><mi>v<\/mi><mrow><mi>n<\/mi><mo>,<\/mo><mi>rms<\/mi><\/mrow><\/msub><mo>=<\/mo><msqrt><mfrac><mrow><mi>k<\/mi><mi>T<\/mi><\/mrow><mi>C<\/mi><\/mfrac><\/msqrt><\/math><\/div>\n<p>\u5176\u4e2d\uff0ck \u662f\u73bb\u5c14\u5179\u66fc\u5e38\u6570\uff0cT \u662f\u7edd\u5bf9\u6e29\u5ea6\u3002kT\/C \u662f\u566a\u58f0\u7535\u538b\u7684\u5747\u65b9\u503c\uff0c\u800c\u4e0d\u662f\u7535\u538b\u5e45\u5ea6\u3002<\/p>\n<p>\u7ed3\u679c\u91cc\u6ca1\u6709 R\uff0c\u8fd9\u4e00\u70b9\u503c\u5f97\u8bb0\u4f4f\uff1a\u51cf\u5c0f R\uff0c\u7535\u963b\u7684\u70ed\u566a\u58f0\u7535\u538b\u8c31\u5bc6\u5ea6\u4f1a\u4e0b\u964d\uff0c\u4f46 RC \u5e26\u5bbd\u540c\u65f6\u53d8\u5bbd\uff0c\u5141\u8bb8\u66f4\u591a\u9891\u7387\u7684\u566a\u58f0\u5230\u8fbe\u7535\u5bb9\u3002\u5bf9\u8fd9\u4e2a\u7b80\u5355\u7684 RC \u7535\u8def\uff0c\u4e24\u4e2a\u53d8\u5316\u6070\u597d\u62b5\u6d88\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u51cf\u5c0f\u7535\u963b\u80fd\u8ba9\u7535\u5bb9\u66f4\u5feb\u5efa\u7acb\uff0c\u5374\u65e0\u6cd5\u964d\u4f4e\u5145\u5206\u5efa\u7acb\u540e\u7684\u8fd9\u90e8\u5206\u603b\u566a\u58f0\u3002\u7406\u60f3\u7535\u5bb9\u672c\u8eab\u4e5f\u4e0d\u662f\u566a\u58f0\u6e90\uff0c\u5b83\u4fdd\u5b58\u7684\u5176\u5b9e\u662f\u7535\u963b\u5e26\u6765\u7684\u968f\u673a\u7535\u8377\u6ce2\u52a8\u3002<\/p>\n<h2>\u91c7\u6837\u7535\u8def<\/h2>\n<p>\u91c7\u6837\u5f00\u5173\u5bfc\u901a\u65f6\uff0c\u53ef\u4ee5\u8fd1\u4f3c\u770b\u6210\u4e00\u4e2a\u7535\u963b\uff0c\u91c7\u6837\u7535\u5bb9\u901a\u8fc7\u5b83\u8ddf\u968f\u8f93\u5165\u3002\u4fe1\u53f7\u9010\u6e10\u5efa\u7acb\u7684\u540c\u65f6\uff0c\u5f00\u5173\u7684\u70ed\u566a\u58f0\u4e5f\u4f1a\u8ba9\u7535\u5bb9\u7535\u538b\u4ea7\u751f\u7ec6\u5c0f\u6ce2\u52a8\u3002<\/p>\n<p>\u5f00\u5173\u65ad\u5f00\uff0c\u76f8\u5f53\u4e8e\u7ed9\u5f53\u65f6\u7684\u7535\u538b\u62cd\u4e0b\u4e00\u5f20\u7167\u7247\uff1a\u65e2\u62cd\u4e0b\u4e86\u4fe1\u53f7\uff0c\u4e5f\u7559\u4e0b\u4e86\u90a3\u4e00\u523b\u53e0\u52a0\u7684\u968f\u673a\u8bef\u5dee\u3002\u65ad\u5f00\u5f00\u5173\u5e76\u4e0d\u4f1a\u81ea\u52a8\u64e6\u9664\u8fd9\u4efd\u8bef\u5dee\u3002<\/p>\n<p>\u6240\u4ee5\u5728\u7b80\u5355\u7684\u91c7\u6837\u4fdd\u6301\u6a21\u578b\u4e2d\uff0c\u53ea\u8981\u5bfc\u901a\u65f6\u95f4\u8db3\u591f\u957f\uff0c\u5f00\u5173\u70ed\u566a\u58f0\u7559\u4e0b\u7684\u91c7\u6837\u8bef\u5dee\u7684\u5747\u65b9\u503c\u5c31\u662f kT\/C\u3002\u5b9e\u9645\u7535\u8def\u8fd8\u53ef\u80fd\u53e0\u52a0\u653e\u5927\u5668\u7b49\u5176\u4ed6\u566a\u58f0\u6765\u6e90\uff0c\u4e0d\u80fd\u628a\u5168\u90e8\u566a\u58f0\u90fd\u5f52\u5230\u8fd9\u4e00\u9879\u4e0a\u3002<\/p>\n<h2>\u7535\u5bb9\u8be5\u53d6\u591a\u5927<\/h2>\n<p>\u7531\u516c\u5f0f\u53ef\u89c1\uff0c\u628a C \u589e\u5927\u5230\u56db\u500d\uff0c\u566a\u58f0\u7535\u538b\u7684 RMS \u624d\u4f1a\u51cf\u534a\u3002\u964d\u4f4e\u566a\u58f0\u6240\u8981\u4ed8\u51fa\u7684\u7535\u5bb9\u4ee3\u4ef7\uff0c\u6bd4\u76f4\u89c9\u4e2d\u66f4\u5927\u3002<\/p>\n<p>\u66f4\u5927\u7684\u7535\u5bb9\u8fd8\u5360\u7528\u66f4\u591a\u9762\u79ef\u3002\u5728\u5f00\u5173\u7535\u963b\u4e0d\u53d8\u65f6\uff0c\u5b83\u5efa\u7acb\u5f97\u66f4\u6162\uff1b\u82e5\u60f3\u7ef4\u6301\u539f\u6765\u7684\u901f\u5ea6\uff0c\u5c31\u9700\u8981\u66f4\u5f3a\u7684\u9a71\u52a8\uff0c\u8fd9\u901a\u5e38\u4e5f\u4f1a\u589e\u52a0\u529f\u8017\u3002<\/p>\n<p>\u56e0\u6b64\uff0ckT\/C \u7ed9\u51fa\u4e86\u9009\u62e9\u91c7\u6837\u7535\u5bb9\u7684\u4e00\u4e2a\u8d77\u70b9\uff1a\u5148\u6ee1\u8db3\u566a\u58f0\u8981\u6c42\uff0c\u518d\u68c0\u67e5\u901f\u5ea6\u548c\u529f\u8017\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5373\u4f7f\u8f93\u5165\u7535\u538b\u4fdd\u6301\u4e0d\u53d8\uff0c\u7535\u8def\u7684\u8f93\u51fa\u4e5f\u4e0d\u4f1a\u5b8c\u5168\u9759\u6b62\u3002\u5668\u4ef6\u5185\u90e8\u7684\u968f\u673a\u8fc7\u7a0b\u4f1a\u8ba9\u7535\u538b\u548c\u7535\u6d41\u4ea7\u751f\u7ec6\u5c0f\u7684\u6ce2\u52a8\uff0c\u8fd9\u5c31\u662f\u566a\u58f0\uff08Noise\uff09\u3002\u4fe1\u53f7\u8d8a\u5fae\u5f31\uff0c\u8fd9\u4e9b\u6ce2\u52a8\u5c31\u8d8a\u5bb9\u6613\u63a9\u76d6\u6211\u4eec\u771f\u6b63\u60f3\u6d4b\u7684\u53d8\u5316\u3002 \u7406\u89e3\u566a\u58f0\uff0c\u53ef\u4ee5\u6293\u4f4f\u4e24\u4e2a\u95ee&#8230; <a href=\"https:\/\/ezblog.cn\/?p=486\" class=\"readmore\">Read more<span class=\"screen-reader-text\">kT\/C \u566a\u58f0<\/span><span class=\"fa fa-angle-double-right\" aria-hidden=\"true\"><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[12],"tags":[],"views":7,"_links":{"self":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/486"}],"collection":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=486"}],"version-history":[{"count":1,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/486\/revisions"}],"predecessor-version":[{"id":487,"href":"https:\/\/ezblog.cn\/index.php?rest_route=\/wp\/v2\/posts\/486\/revisions\/487"}],"wp:attachment":[{"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ezblog.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}