{"id":28658,"date":"2026-02-02T09:00:19","date_gmt":"2026-02-02T01:00:19","guid":{"rendered":"https:\/\/techclass.wfjydl.com\/?p=28658"},"modified":"2026-02-02T13:38:27","modified_gmt":"2026-02-02T05:38:27","slug":"%e4%bb%80%e4%b9%88%e6%98%af%e5%88%86%e5%8e%8b%e5%ae%9a%e5%be%8b%ef%bc%88%e5%88%86%e5%8e%8b%e7%94%b5%e8%b7%af%ef%bc%89%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/techclass.wfjydl.com\/knowledge\/circuit-design\/circuit-design-basic\/26855","title":{"rendered":"\u4ec0\u4e48\u662f\u5206\u538b\u5b9a\u5f8b\uff08\u5206\u538b\u7535\u8def\uff09\uff1f"},"content":{"rendered":"\\(\\)\n<p>\u5206\u538b\u7535\u8def\u662f\u4e00\u79cd\u901a\u8fc7\u7ed3\u5408\u7535\u963b\u7b49\u5143\u4ef6\u5c06\u8f93\u5165\u7535\u538b\u8f6c\u6362\u4e3a\u6240\u9700\u8f93\u51fa\u7535\u538b\u7684\u7535\u8def\u3002\u901a\u8fc7\u7535\u963b\u503c\u6bd4\u4f8b\u6765\u63a7\u5236\u8f93\u51fa\u7535\u538b\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7535\u5b50\u8bbe\u5907\u7684\u5de5\u4f5c\u7535\u538b\u8c03\u6574\u7528\u9014\u3002\u4f8b\u5982\uff0c\u53ef\u7528\u4e8e\u9632\u6b62LED\u6216\u4f20\u611f\u5668\u88ab\u65bd\u52a0\u8fc7\u9ad8\u7535\u538b\uff0c\u786e\u4fdd\u5b89\u5168\u8fd0\u884c\u7b49\u7528\u9014\u3002\u5206\u538b\u7535\u8def\u662f\u7535\u8def\u8bbe\u8ba1\u4e2d\u7684\u57fa\u672c\u8981\u7d20\u4e4b\u4e00\uff0c\u88ab\u7528\u4e8e\u5404\u79cd\u573a\u666f\u3002\u5b9e\u9645\u4e0a\uff0c\u5728\u653e\u5927\u7535\u8def\u548c\u5fae\u63a7\u5236\u5668\u7684\u8f93\u5165\u5355\u5143\u7b49\u90e8\u4f4d\uff0c\u6709\u5f88\u591a\u5206\u538b\u7535\u8def\uff0c\u5b83\u4eec\u5728\u4fe1\u53f7\u5904\u7406\u548c\u6a21\u62df\u63a7\u5236\u4e2d\u53d1\u6325\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n<h2 id=\"toc1\">\u5206\u538b\u7535\u8def\u7684\u539f\u7406\u548c\u57fa\u672c\u516c\u5f0f<\/h2>\n<p>\u672c\u8282\u5c06\u9610\u8ff0\u5206\u538b\u7535\u8def\u4e2d\u7535\u963b\u503c\u7684\u6bd4\u662f\u5982\u4f55\u51b3\u5b9a\u7535\u538b\u5206\u914d\u7684\uff0c\u5e76\u9010\u6b65\u63a8\u5bfc\u51fa\u76f8\u5173\u516c\u5f0f\u3002<\/p>\n<h3 id=\"toc3\">\u6b27\u59c6\u5b9a\u5f8b\u548c\u4e32\u8054\u7535\u8def<\/h3>\n<p>\u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u6d41\u8fc7\u5404\u5143\u5668\u4ef6\u7684\u7535\u6d41\u662f\u76f8\u540c\u7684\uff0c\u800c\u5404\u7535\u963b\u7684\u7535\u538b\u964d\u4e0e\u5176\u963b\u503c\u6210\u6b63\u6bd4\u3002\u6b27\u59c6\u5b9a\u5f8b\u53ef\u7528\u4e0b\u9762\u7684\u516c\u5f0f\u6765\u8868\u793a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V=I\u00d7R\u27f9I=\\displaystyle\\frac{V}{R}\\)<\/span><\/p>\n<h3 id=\"toc4\">\u901a\u8fc7\u4e24\u4e2a\u7535\u963b\u8fdb\u884c\u5206\u538b<\/h3>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u7535\u963b\\(R_1\\)\u548c\\(R_2\\)\u4e32\u8054\u8fde\u63a5\uff0c\u65bd\u52a0\u8f93\u5165\u7535\u538b\\(V_{IN}\\)\uff0c\u5e76\u5728\\(R_2\\)\u4e24\u7aef\uff08\u4ee5\u63a5\u5730\u4e3a\u57fa\u51c6\uff09\u6d4b\u91cf\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)\u3002\u6d41\u8fc7\u7535\u8def\u7684\u7535\u6d41\u4e3a\u4e0a\u8ff0\u7684\\(I\\)\u3002\u65bd\u52a0\u4e8e\\(R_2\\)\u7684\u7535\u538b\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=I\u00d7R_2\\)<\/span><\/p>\n<p>\u5c06\\(V_{IN}\\) \/(\\(R_1\\)+\\(R_2\\))\u4ee3\u5165\u516c\u5f0f\u4e2d\u7684\\(I\\)\uff0c\u53ef\u5f97\u5230\u5982\u4e0b\u516c\u5f0f\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=\\displaystyle\\frac{V_{IN}}{R_1+R_2}\u00d7R_2\\)<\/span><\/p>\n<p>\u8fd9\u662f\u57fa\u7840\u7684\u5206\u538b\u516c\u5f0f\u3002\u6362\u8a00\u4e4b\uff0c\u53ef\u4ee5\u8bf4\u5f53\\(R_1\\)\u548c\\(R_2\\)\u4e32\u8054\u8fde\u63a5\u65f6\uff0c\u65bd\u52a0\u4e8e\\(R_2\\)\u7684\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)\u662f\u6309\u7167\u4e0b\u9762\u516c\u5f0f\u4e2d\u7684\u6bd4\u4f8b\u4ece\\(V_{IN}\\)\u5206\u538b\u5f97\u5230\u7684\u503c\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(\\displaystyle\\frac{R_2}{R_1+R_2}\\)<\/span><\/p>\n<p>\u65bd\u52a0\u4e8e\\(R_1\\)\u7684\u7535\u538b\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{R_1}=I\u00d7R_1=\\displaystyle\\frac{V_{IN}}{R_1+R_2}\u00d7R_1\\)<\/span><\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/01-deriving-voltage-divider-with-2-resistors.png\" alt=\"\u901a\u8fc7\u4e24\u4e2a\u7535\u963b\u8fdb\u884c\u5206\u538b\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc5\">\u901a\u8fc7\u4e09\u4e2a\u4ee5\u4e0a\u7684\u7535\u963b\u8fdb\u884c\u5206\u538b\u6269\u5c55<\/h3>\n<p>\u4e09\u4e2a\u4ee5\u4e0a\u7684\u591a\u4e2a\u7535\u963b\u4e32\u8054\u8fde\u63a5\u65f6\uff0c\u540c\u6837\u9002\u7528\u4e0a\u8ff0\u63a8\u5bfc\u601d\u8def\u3002\u4f8b\u5982\uff0c\u5f53\u7535\u963b\\(R_1\\)\u3001\\(R_2\\)\u2026\u2026\\(R_N\\)\u4e32\u8054\u65f6\uff0c\u6d41\u7ecf\u7535\u8def\u7684\u7535\u6d41\\(I\\)\u53ef\u8868\u793a\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I=\\displaystyle\\frac{V_{IN}}{R_1+R_2+\u22ef+R_N}\\)<\/span><\/p>\n<p>\u5982\u679c\u8981\u4ece\u67d0\u7535\u963b\u7684\u4e2d\u9014\u70b9\u83b7\u53d6\u7279\u5b9a\u7535\u538b\uff0c\u53ea\u9700\u8003\u8651\u8be5\u4e2d\u9014\u70b9\uff08\u62bd\u5934\u70b9\uff09\u4e4b\u540e\u8fde\u63a5\u7684\u6240\u6709\u7535\u963b\u7684\u603b\u503c\\(R_T\\)\uff0c\u8f93\u51fa\u7535\u538b\u53ef\u7528\u4e0b\u9762\u7684\u516c\u5f0f\u6765\u8868\u793a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=\\displaystyle\\frac{R_{T}}{R_1+R_2+\u22ef+R_N}\u00d7V_{IN}\\)<\/span><\/p>\n<p>\u5229\u7528\u8be5\u516c\u5f0f\uff0c\u53ef\u8f7b\u677e\u8ba1\u7b97\u4efb\u610f\u6570\u91cf\u7684\u7535\u963b\u6784\u6210\u7684\u4e32\u8054\u7535\u8def\u4e2d\u7684\u5206\u538b\u60c5\u51b5\u3002<\/p>\n<p>\u65bd\u52a0\u4e8e\u5404\u7535\u963b\u7684\u7535\u538b\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{R_1}=I\u00d7R_1, V_{R_2}=I\u00d7R_2,\u22ef\\)<\/span><\/p>\n<p>\u7531\u4e8e\u6d41\u7ecf\u5404\u7535\u963b\u7684\u7535\u6d41\u76f8\u540c\uff0c\u56e0\u6b64\u7535\u538b\u964d\u4e0e\u5404\u76f8\u5e94\u7684\u7535\u963b\u503c\u6210\u6b63\u6bd4\u3002\u5f53\u9700\u8981\u5728\u7535\u8def\u7684\u4e2d\u9014\u70b9\u83b7\u53d6\u7279\u5b9a\u7535\u538b\u65f6\uff0c\u53ef\u89c6\u4e3a\\(V_{IN}\\)\u5c06\u6309\u4e2d\u9014\u70b9\u4e4b\u540e\u7684\u603b\u963b\u503c\u7684\u6bd4\u4f8b\u8fdb\u884c\u5206\u538b\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/02-extending-to-3-more-resistors.png\" alt=\"\u901a\u8fc7\u4e09\u4e2a\u4ee5\u4e0a\u7535\u963b\u8fdb\u884c\u5206\u538b\u6269\u5c55\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc6\">\u5206\u538b\u5b9a\u5f8b<\/h3>\n<p>\u5728\u4e32\u8054\u7535\u8def\u4e2d\uff0c\u65bd\u52a0\u4e8e\u5404\u7535\u963b\u7684\u7535\u538b\u53d6\u51b3\u4e8e\u5176\u963b\u503c\u4e0e\u603b\u7535\u963b\u503c\u7684\u6bd4\u4f8b\u3002\u8fd9\u4e00\u539f\u7406\u88ab\u79f0\u4e3a\u201c\u5206\u538b\u5b9a\u5f8b\u201d\uff0c\u5229\u7528\u8be5\u5b9a\u5f8b\uff0c\u53ef\u5feb\u901f\u8ba1\u7b97\u51fa\u4efb\u610f\u7535\u963b\u5728\u8f93\u5165\u7535\u538b\u4e2d\u6240\u5360\u7684\u6bd4\u4f8b\u3002\u8fd9\u662f\u5206\u538b\u7535\u8def\u4e2d\u5e7f\u6cdb\u5e94\u7528\u7684\u57fa\u7840\u6982\u5ff5\uff0c\u4ece\u7b80\u5355\u7684\u53cc\u7535\u963b\u793a\u4f8b\u5230\u591a\u7ea7\u7535\u963b\u7f51\u7edc\u5747\u9002\u7528\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/03-voltage-divider-rule-in-series-circuit.png\" alt=\"\u4e32\u8054\u7535\u8def\u4e2d\u7684\u5206\u538b\u5b9a\u5f8b\" width=\"700\" height=\"394\" \/><\/p>\n<h2 id=\"toc7\">\u5206\u538b\u7535\u8def\u8bbe\u8ba1\u793a\u4f8b\u53ca\u5177\u4f53\u8ba1\u7b97\u6b65\u9aa4<\/h2>\n<p>\u672c\u8282\u5c06\u901a\u8fc7\u5177\u4f53\u6570\u503c\u5e76\u7ed3\u5408\u4eff\u771f\u6765\u4ecb\u7ecd\u5206\u538b\u7535\u8def\u7684\u8bbe\u8ba1\u6b65\u9aa4\u3002\u6211\u4eec\u5c06\u4e0d\u7701\u7565\u4e2d\u95f4\u8ba1\u7b97\u6b65\u9aa4\uff0c\u8fd9\u6837\u53ef\u4ee5\u9010\u6b65\u786e\u8ba4\u5206\u538b\u539f\u7406\u7684\u63a8\u5bfc\u903b\u8f91\u3002<\/p>\n<h3 id=\"toc8\">\u57fa\u4e8e\u53cc\u7535\u963b\u7684\u57fa\u672c\u5206\u538b\u7535\u8def\u793a\u4f8b<\/h3>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/04-basic-2-resistor-divider-example.png\" alt=\"\u57fa\u4e8e\u53cc\u7535\u963b\u7684\u57fa\u672c\u5206\u538b\u7535\u8def\u793a\u4f8b\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u6211\u4eec\u5047\u8bbe\u8fd9\u662f\u5728\u8f93\u51655V\u7684\u7535\u8def\u4e2d\u9700\u8981\u8f93\u51fa3V\u7684\u60c5\u51b5\u3002\u91c7\u7528\\(R_1\\)\u548c\\(R_2\\)\u4e24\u4e2a\u7535\u963b\uff0c\u5728\\(R_2\\)\u7aef\uff08\u63a5\u5730\u4fa7\uff09\u83b7\u53d6\u8f93\u51fa\\(V_{OUT}\\)\u3002\u4f7f\u7528\u57fa\u672c\u516c\u5f0f\u8fdb\u884c\u5982\u4e0b\u63a8\u5bfc\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=\\displaystyle\\frac{V_{IN}}{R_1+R_2}\u00d7R_2 \u27f9 3=\\displaystyle\\frac{5}{R_1+R_2}\u00d7R_2\\)<\/span><\/p>\n<p>\u53d8\u5f62\u540e\u53ef\u5f97\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(\\displaystyle\\frac{R_1}{R_2}=\\displaystyle\\frac{2}{3}\\)<\/span><\/p>\n<p>\u7136\u540e\uff0c\u5047\u8bbe\u6211\u4eec\u5e0c\u671b\u5c06\u6d41\u8fc7\u5206\u538b\u7535\u8def\u7684\u7535\u6d41\u63a7\u5236\u57281mA\u5de6\u53f3\uff0c\u5219\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(I=\\displaystyle\\frac{V_{IN}}{R_1+R_2}\u27f91\u00d710^{\u22123}=\\displaystyle\\frac{5}{R_1+R_2}\\)<\/span><\/p>\n<p>\u6240\u4ee5\uff0c\\(R_1\\)+\\(R_2\\)=5k\u03a9\uff0c\u4e3a\u6ee1\u8db32:3\u7684\u6bd4\u4f8b\u5173\u7cfb\uff0c\u5177\u4f53\u53ef\u9009\u62e9\\(R_1\\)=2k\u03a9, \\(R_2\\)=3k\u03a9\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9700\u91c7\u7528E24\u6807\u51c6\u7cfb\u5217\u7684\u8fd1\u4f3c\u503c\uff0c\u540c\u65f6\u8fd8\u9700\u8003\u8651\u8bef\u5dee\u56e0\u7d20\u3002<\/p>\n<h2 id=\"toc9\">\u5206\u538b\u7535\u8def\u8bbe\u8ba1\u7684\u4e3b\u8981\u8003\u8651\u56e0\u7d20<\/h2>\n<p>\u4ec5\u5c06\u4e24\u4e2a\u4ee5\u4e0a\u7535\u963b\u4e32\u8054\u8fde\u63a5\u6709\u65f6\u5e76\u4e0d\u8db3\u4ee5\u5b9e\u73b0\u8bbe\u8ba1\u76ee\u6807\u3002\u5bfc\u81f4\u7406\u60f3\u8ba1\u7b97\u4e0e\u5b9e\u9645\u7535\u8def\u5b58\u5728\u5dee\u5f02\u7684\u539f\u56e0\u5305\u62ec\u7535\u963b\u503c\u7684\u516c\u5dee\u3001\u8d1f\u8f7d\u6ce2\u52a8\u4ee5\u53ca\u6e29\u5ea6\u7279\u6027\u7b49\u56e0\u7d20\u3002\u901a\u8fc7\u9884\u5148\u8003\u91cf\u8fd9\u4e9b\u56e0\u7d20\uff0c\u53ef\u4ee5\u63d0\u5347\u6700\u7ec8\u7684\u5206\u538b\u7cbe\u5ea6\u3002\u672c\u8282\u5c06\u9610\u8ff0\u5206\u538b\u6bd4\u7684\u7a33\u5b9a\u6027\u3001\u529f\u8017\u3001\u6e29\u5ea6\u7cfb\u6570\u7b49\u5173\u952e\u8bbe\u8ba1\u8981\u70b9\u3002<\/p>\n<h3 id=\"toc10\">\u8d1f\u8f7d\u7684\u5f71\u54cd\u548c\u8d1f\u8f7d\u6ce2\u52a8<\/h3>\n<p>\u5206\u538b\u7535\u8def\u7684\u8f93\u51fa\u7aef\u5b50\u6240\u8fde\u63a5\u7684\u8bbe\u5907\u6216\u7535\u8def\uff0c\u901a\u5e38\u79f0\u4e3a\u201c\u8d1f\u8f7d\u201d\u3002\u5f53\u5728\u7535\u963b\\(R_1\\)\u548c\\(R_2\\)\u6784\u6210\u7684\u5206\u538b\u7535\u8def\u4e2d\u5e76\u8054\u8fde\u63a5\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u65f6\uff0c\\(R_2\\)\u4e0e\\(R_L\\)\u5c06\u5f62\u6210\u5e76\u8054\u5173\u7cfb\uff0c\u7528\u7b26\u53f7\u201c\u2016\u201d\u8868\u793a\u7535\u963b\u7684\u5e76\u8054\u8fde\u63a5\u3002\u4f8b\u5982\uff0c\u5f53\u7535\u963b\\(R_2\\)\u548c\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u5e76\u8054\u65f6\uff0c\u5176\u5408\u6210\u7535\u963b\u53ef\u8868\u793a\u5982\u4e0b\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_2\u2225R_{L}=\\displaystyle\\frac{R_2\u00d7R_{L}}{R_2+R_{L}}\\)<\/span><\/p>\n<p>\u8be5\u5408\u6210\u7535\u963b\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5b9e\u9645\u7535\u538b\u4f4e\u4e8e\u9884\u671f\u7535\u538b\u503c\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/05-loading-effect-in-voltage-divider.png\" alt=\"\u5206\u538b\u7535\u8def\u4e2d\u8d1f\u8f7d\u7684\u5f71\u54cd\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u4ee5\u4e0a\u8ff0\u53cc\u7535\u963b\u5206\u538b\u7535\u8def\u4e3a\u4f8b\u8fdb\u884c\u63a2\u8ba8\u3002<\/p>\n<ul class=\"unordered-list\">\n<li>\\(V_{IN}\\)\uff1a5V<\/li>\n<li>\\(R_1\\)\uff1a2k\u03a9<\/li>\n<li>\\(R_2\\)\uff1a3k\u03a9<\/li>\n<\/ul>\n<p>\u5047\u8bbe\u7ed9\u8f93\u51fa\u7aef\u65bd\u52a0\u7ea69k\u03a9\u7684\u8d1f\u8f7d\u3002\u7531\u4e8e\\(R_2\\)\u4e0e\\(R_L\\)\u5e76\u8054\uff0c\u56e0\u6b64\u5176\u5408\u6210\u7535\u963b\\(R_2\\)\u2016\\(R_L\\)\u4e3a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_2\u2225R_{L}=\\displaystyle \\frac{3k\u00d79k}{3k+9k}=2.25k\\)<\/span><\/p>\n<p>\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)\u4e3a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=\\displaystyle \\frac{2.25k}{2k+2.25k}\u00d75\u22482.65\\)<\/span><\/p>\n<p>\u8f93\u51fa\u7535\u538b\u4f4e\u4e8e\u9884\u671f\u76843V\u3002\u50cf\u8fd9\u6837\u8f93\u51fa\u7535\u538b\u4f4e\u4e8e\u7406\u60f3\u503c\u7684\u539f\u56e0\u5728\u4e8e\uff0c\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u4e0e\u7535\u963b\\(R_2\\)\u5e76\u8054\uff0c\u5bfc\u81f4\u5408\u6210\u7535\u963b\u503c\u6bd4\u539f\u5148\u5355\u72ec\u7684\\(R_2\\)\u963b\u503c\u66f4\u5c0f\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/06-example-of-voltage-divider-circuit-considering-load.png\" alt=\"\u8003\u8651\u5230\u8d1f\u8f7d\u7684\u5206\u538b\u7535\u8def\u793a\u4f8b\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u5728\u8bbe\u8ba1\u4e00\u4e2a\u8d1f\u8f7d\u80fd\u591f\u77ac\u65f6\u5207\u6362\u7684\u7535\u8def\u65f6\uff0c\u8d1f\u8f7d\u7535\u963b\\(R_L\\)\u8d8a\u5c0f\uff0c\\(R_2\\)\u2016\\(R_L\\)\u7684\u503c\u4e5f\u968f\u4e4b\u51cf\u5c0f\uff0c(\\(R_2\\)\u2016\\(R_L\\)) \u4e0e ((\\(R_1\\)+((\\(R_2\\)\u2016\\(R_L\\)))\u7684\u6bd4\u503c\u4e0b\u964d\uff0c\u56e0\u6b64\\(V_{OUT}\\)\u5c06\u4f4e\u4e8e\u7406\u60f3\u503c\u3002\u53cd\u4e4b\uff0c\u82e5\\(R_L\\)\u8db3\u591f\u5927(\u5373\\(R_2\\)\u2016\\(R_L\\)\u2248\\(R_2\\))\uff0c\u5219\u8ba1\u7b97\u7ed3\u679c\u5c06\u8d8b\u8fd1\u4e8e\u65e0\u8d1f\u8f7d\u8ba1\u7b97\u3002<br \/>\n\u5f53\u5206\u538b\u7535\u8def\u6240\u8fde\u63a5\u7684\u8d1f\u8f7d\u7535\u963b\u4e0d\u6052\u5b9a\u3001\u963b\u6297\u56e0\u8bbe\u5907\u8fd0\u884c\u800c\u6ce2\u52a8\u65f6\uff0c\u8f93\u51fa\u7535\u538b\u4e5f\u4f1a\u6709\u5f88\u5927\u6ce2\u52a8\u3002\u56e0\u6b64\uff0c\u9700\u8981\u91c7\u53d6\u8bf8\u5982\u7528\u8fd0\u7b97\u653e\u5927\u5668\u7b49\u9ad8\u8f93\u5165\u963b\u6297\u7eed\u201c\u5206\u538b\u7535\u8def\u4e0e\u5176\u4ed6\u7535\u8def\u5143\u4ef6\u7684\u7ec4\u5408\u201d\u4e2d\u7535\u8def\u5bf9\u5206\u538b\u7535\u8def\u7684\u8f93\u51fa\u8fdb\u884c\u7f13\u51b2\uff0c\u6216\u8bbe\u8ba1\u8db3\u591f\u5927\u7684\u8d1f\u8f7d\u7535\u963b\u7b49\u63aa\u65bd\u3002\u5fc5\u987b\u5bf9\u5404\u79cd\u5de5\u51b5\u8fdb\u884c\u4eff\u771f\uff0c\u4ece\u800c\u8fdb\u884c\u5408\u7406\u8bbe\u8ba1\u3002<br \/>\n\u203b\u540e\u5c06\u9610\u8ff0\u91c7\u7528\u8fd0\u7b97\u653e\u5927\u5668\u5b9e\u73b0\u7684\u7f13\u51b2\u3002<\/p>\n<h3 id=\"toc11\">\u7535\u963b\u503c\u8bef\u5dee<\/h3>\n<p>\u7535\u963b\u5b58\u5728\u00b15%\u3001\u00b11%\u7b49\u8bef\u5dee\u7b49\u7ea7\u3002\u5373\u4f7f\u4e25\u5bc6\u5730\u8bbe\u5b9a\u4e86\u51b3\u5b9a\u5206\u538b\u6bd4\u7684\u6bd4\u4f8b\\(R_1\\)\uff1a\\(R_2\\)\uff0c\u5b9e\u9645\u7684\u5143\u5668\u4ef6\u8bef\u5dee\u4ecd\u53ef\u80fd\u5bfc\u81f4\u767e\u5206\u4e4b\u51e0\u7684\u8bef\u5dee\u3002\u5982\u679c\u8ffd\u6c42\u9ad8\u7cbe\u5ea6\uff0c\u5c31\u5e94\u9009\u7528\u8bef\u5dee\u8f83\u5c0f\u7684\u91d1\u5c5e\u819c\u7535\u963b\u548c\u6e29\u5ea6\u7279\u6027\u4f18\u5f02\u7684\u4ea7\u54c1\u3002<\/p>\n<p>\u5047\u8bbe\u5728\\(R_1\\) = 7.0k\u03a9 \u00b11%\u3001\\(R_2\\) = 5.0k\u03a9 \u00b1 1%\u7684\u6761\u4ef6\u4e0b\uff0c\u8fdb\u884c12V\u21925V\u7684\u5206\u538b\u65f6\uff0c\u5728\\(R_2\\)\u53d6\u6700\u5927\u503c\u3001\\(R_1\\)\u53d6\u6700\u5c0f\u503c\u7b49\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u83b7\u5f97\u9ad8\u4e8e5V\u7684\u7535\u538b\u503c\u3002\u53cd\u4e4b\uff0c\u7535\u538b\u53ef\u80fd\u4f4e\u4e8e5V\uff0c\u4ece\u800c\u5bfc\u81f4\u8f93\u51fa\u7535\u538b\u51fa\u73b0\u6ce2\u52a8\u3002\u5982\u679c\u5e0c\u671b\u63d0\u5347\u7cbe\u5ea6\uff0c\u53ef\u9009\u62e9\u516c\u5dee\u66f4\u5c0f\u7684\u7535\u963b\uff08\u5982\u00b10.1%\uff09\uff0c\u6216\u901a\u8fc7\u5fae\u8c03\u7535\u4f4d\u5668\u8fdb\u884c\u7cbe\u7ec6\u8c03\u6574\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/07-resistor-tolerance-in-voltage-divider-circuit.png\" alt=\"\u5206\u538b\u7535\u8def\u7684\u7535\u963b\u503c\u8bef\u5dee\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc12\">\u6e29\u5ea6\u7279\u6027\u548c\u73af\u5883<\/h3>\n<p>\u7535\u963b\u5668\u5177\u6709\u963b\u503c\u968f\u6e29\u5ea6\u53d8\u5316\u800c\u53d8\u6362\u7684\u7279\u6027\u3002\u6e29\u5ea6\u7cfb\u6570\u8f83\u5927\u65f6\uff0c\u73af\u5883\u6e29\u5ea6\u53d8\u5316\u53ef\u80fd\u5bfc\u81f4\u5206\u538b\u6bd4\u53d1\u751f\u53d8\u5316\u3002\u5728\u5206\u538b\u7535\u8def\u4e2d\u9700\u8981\u7cbe\u786e\u63a7\u5236\u7535\u538b\u65f6\uff0c\u53ef\u9009\u7528\u6e29\u5ea6\u7cfb\u6570\u8f83\u5c0f\u7684\u7535\u963b\uff08\u5982\u91d1\u5c5e\u819c\u7535\u963b\u7b49\uff09\uff0c\u6216\u901a\u8fc7\u9650\u5b9a\u5de5\u4f5c\u6e29\u5ea6\u8303\u56f4\u7b49\u63aa\u65bd\u6765\u83b7\u5f97\u7a33\u5b9a\u7684\u7535\u538b\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/08-resistance-temperature-coefficient-calc-example.png\" alt=\"\u7535\u963b\u6e29\u5ea6\u7cfb\u6570\uff08TCR\uff09\u793a\u4f8b\" width=\"700\" height=\"394\" \/><\/p>\n<p>\\(R_1\\)\u548c\\(R_2\\)\u7684\u6e29\u5ea6\u7cfb\u6570\u4e3a+100ppm\/\u2103\u65f6\uff0c\u82e5\u6e29\u5ea6\u4ece25\u2103\u5347\u81f335\u2103\uff08\u5347\u6e2910\u2103\uff09\uff0c\u5219\u5176\u963b\u503c\u5c06\u5206\u522b\u589e\u52a00.1%\u3002\u5982\u679c\u4e24\u4e2a\u7535\u963b\u53d1\u751f\u540c\u7b49\u7a0b\u5ea6\u7684\u53d8\u5316\uff0c\u5219\u5206\u538b\u6bd4\u4e0d\u4f1a\u53d1\u751f\u663e\u8457\u53d8\u5316\uff1b\u7136\u800c\uff0c\u5982\u679c\u56e0\u7535\u963b\u6ce2\u52a8\u6216\u5c40\u90e8\u53d1\u70ed\u800c\u5f15\u53d1\u5dee\u5f02\u53d8\u5316\uff0c\u5219\u4f1a\u5f15\u8d77\u8f93\u51fa\u7535\u538b\u6ce2\u52a8\u3002<\/p>\n<h3 id=\"toc13\">\u529f\u8017\u548c\u6563\u70ed\u95ee\u9898<\/h3>\n<p>\u5206\u538b\u7535\u8def\u56e0\u59cb\u7ec8\u6709\u7535\u6d41\u901a\u8fc7\uff0c\u56e0\u6b64\u7535\u963b\u4f1a\u4ea7\u751f\u529f\u7387\u635f\u8017\u3002\u6839\u636e\u6b27\u59c6\u5b9a\u5f8b\u548c\u7126\u8033\u70ed\u7684\u5173\u7cfb<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(P=I^2\u00d7R\\)<\/span><\/p>\n<p>\u6216<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(P=\\displaystyle \\frac{V^2}{R}\\)<\/span><\/p>\n<p>\u6240\u793a\uff0c\u9700\u8981\u8003\u8651\u7535\u963b\u6240\u6d88\u8017\u7684\u529f\u7387\u3002<\/p>\n<p>\u7279\u522b\u662f\u5728\u5206\u914d\u9ad8\u7535\u538b\u65f6\u6216\u6d41\u8fc7\u5927\u7535\u6d41\u7684\u7535\u8def\u4e2d\uff0c\u529f\u8017\u53ef\u80fd\u4f1a\u589e\u52a0\uff0c\u7535\u963b\u53d1\u70ed\u53ef\u80fd\u4f1a\u6210\u4e3a\u65e0\u6cd5\u5ffd\u89c6\u7684\u95ee\u9898\u3002\u9700\u8981\u6ce8\u610f\u786e\u4fdd\u4e0d\u8d85\u8fc7\u7535\u963b\u5668\u7684\u989d\u5b9a\u529f\u8017\u3002<\/p>\n<h2 id=\"toc14\">\u4f7f\u7528\u4e86\u53ef\u53d8\u7535\u963b\u5668\uff08\u7535\u4f4d\u5668\uff09\u7684\u5206\u538b\u7535\u8def<\/h2>\n<h3 id=\"toc15\">\u7535\u4f4d\u5668\u7684\u7ed3\u6784\u548c\u4f5c\u7528<\/h3>\n<p>\u7535\u4f4d\u5668\u67093\u4e2a\u5f15\u51fa\u7aef\uff08\u53733\u4e2a\u5f15\u811a\uff09\uff0c\u4e24\u7aef\u7684\u5f15\u811a\u4e3a\u7535\u963b\u4f53\u7684\u4e24\u7aef\uff0c\u4e2d\u592e\u7684\u5f15\u811a\u662f\u6ed1\u52a8\u7aef\uff08\u7535\u5237\uff09\u3002\u5728\u4e24\u7aef\u65bd\u52a0\u7535\u538b\uff0c\u901a\u8fc7\u4e2d\u592e\u5f15\u811a\u4e0e\u4efb\u4e00\u5f15\u811a\u95f4\u5f15\u51fa\u7535\u538b\uff0c\u5373\u53ef\u6839\u636e\u65cb\u94ae\u4f4d\u7f6e\u8fde\u7eed\u8c03\u6574\u5206\u538b\u6bd4\u3002\u7531\u4e8e\u4ec5\u9700\u5355\u4e2a\u7535\u963b\u5143\u4ef6\u5373\u53ef\u5b9e\u73b0\u53ef\u8c03\u5206\u538b\u529f\u80fd\uff0c\u56e0\u6b64\u5176\u4f5c\u4e3a\u8c03\u6574\u7528\u7684\u7535\u8def\u5143\u4ef6\u5df2\u88ab\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n<p>\u5728\u8fd9\u91cc\u6211\u4eec\u5047\u8bbe\u6709\u4e00\u4e2a10k\u03a9\u7684\u7535\u4f4d\u5668\u3002\u6709\u5f15\u811aA\uff08\u5de6\u7aef\uff09\u3001\u5f15\u811aW\uff08\u6ed1\u52a8\u7aef\uff09\u548c\u5f15\u811aB\uff08\u53f3\u7aef\uff09\uff0c\u6b64\u65f6A\u2013B\u95f4\u7535\u963b\u59cb\u7ec8\u4e3a10k\u03a9\u3002\u5f53\u7535\u5237\u4ec5\u65cb\u8f6c\u89d2\u5ea6\\(\u03b8\\)[\u5ea6]\u65f6\uff0c\u82e5\u8bbe\u5b9aA-W\u95f4\u7535\u963b\u4e3a\\(R_1\\)\uff08\\(\u03b8\\)\uff09\u3001W-B\u95f4\u4e3a\\(R_2\\)\uff08\\(\u03b8\\)\uff09\uff0c\u5219\u5982\u4e0b\u5173\u7cfb\u6210\u7acb\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(R_1(\u03b8)+R_2(\u03b8)=10k\\)<\/span><\/p>\n<p>\u7406\u60f3\u60c5\u51b5\u4e0b\uff0c\u5f53\u7535\u5237\u5904\u4e8e\u4e2d\u592e50%\u4f4d\u7f6e\u65f6\uff0c\\(R_1\\)\uff08\\(\u03b8\\)\uff09\u4e0e\\(R_2\\)\uff08\\(\u03b8\\)\uff09\u7684\u963b\u503c\u5e94\u5404\u7ea65k\u03a9\u3002<\/p>\n<p>\u203b\u5b9e\u9645\u7535\u4f4d\u5668\u7684\u516c\u5dee\u901a\u5e38\u4e3a\u00b120%\uff0c\u4e14\u5b58\u5728\u7535\u5237\u63a5\u89e6\u7535\u963b\uff08\u6570\u202f\u03a9\uff5e\u6570\u5341\u202f\u03a9\uff09\u4e32\u8054\u5f71\u54cd\uff0c\u56e0\u6b64\u5728\u7cbe\u5bc6\u6d4b\u91cf\u5e94\u7528\u4e2d\u9700\u8fdb\u884c\u8bef\u5dee\u8865\u507f\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/09-structure-and-purpose-of-potentiometer.png\" alt=\"\u7535\u4f4d\u5668\u7684\u7ed3\u6784\u548c\u4f5c\u7528\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc16\">\u7535\u4f4d\u5668\u5206\u538b\u8ba1\u7b97<\/h3>\n<ul class=\"unordered-list\">\n<li>\u8f93\u5165\\(V_{IN}\\)=5V<\/li>\n<li>10k\u03a9\u7535\u4f4d\u5668<\/li>\n<li>\u4f7f\u7535\u5237\u4f4d\u7f6e\u57280\u301c100%\u7684\u8303\u56f4\u5185\u53ef\u8c03<\/li>\n<\/ul>\n<p>\u5c06\u7535\u4f4d\u5668\u7684\u4e24\u7aef\u5206\u522b\u8fde\u63a5\u81f35V\u7535\u6e90\u548c\u5730\u7ebf\uff0c\u5c06\u4e2d\u592e\u6ed1\u52a8\u7aef\uff08\u7535\u5237\uff09\u4f5c\u4e3a\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)\u3002\u7406\u60f3\u60c5\u51b5\u4e0b\uff0c\u5f53\u7535\u5237\u5904\u4e8e0%\uff08\u63a5\u5730\u7aef\uff09\u65f6\u7535\u538b\u4e3a0V\uff0c\u5904\u4e8e100%\uff085V\u7aef\uff09\u65f6\u7535\u538b\u4e3a5V\uff0c\u5176\u95f4\u7535\u538b\u5448\u8fde\u7eed\u53d8\u5316\u72b6\u6001\u3002\u5f53\u5904\u4e8e30%\u9644\u8fd1\u65f6\uff0c\u82e5A-W\u95f4\u4e3a7k\u03a9\u3001W-B\u95f4\u4e3a3k\u03a9\uff0c\u5219\u53ef\u83b7\u5f97\u5982\u4e0b\u7535\u538b\u503c\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=5\u00d70.3=1.5\\)<\/span><\/p>\n<h3 id=\"toc17\">\u97f3\u91cf\u63a7\u5236\u7535\u8def\u5b9e\u4f8b<\/h3>\n<p>\u97f3\u9891\u653e\u5927\u5668\u7684\u97f3\u91cf\u8c03\u8282\u65cb\u94ae\u901a\u5e38\u91c7\u7528\u5bf9\u6570\u7535\u4f4d\u5668\uff0c\u4ee5\u5b9e\u73b0\u7b26\u5408\u4eba\u7c7b\u542c\u89c9\u7279\u6027\u7684\u53d8\u5316\u3002\u5176\u539f\u7406\u662f\u901a\u8fc7\u7535\u963b\u6bd4\u8fdb\u884c\u5206\u538b\u6765\u8c03\u6574\u97f3\u9891\u4fe1\u53f7\u7535\u5e73\uff0c\u5982\u679c\u7535\u8def\u6574\u4f53\u7684\u963b\u6297\u8fc7\u4f4e\uff0c\u53ef\u80fd\u65e0\u6cd5\u83b7\u5f97\u9884\u671f\u7684\u7279\u6027\uff0c\u56e0\u6b64\u9700\u8981\u8003\u8651\u5230\u4e0e\u4e0b\u4e00\u7ea7\u653e\u5927\u5668\u7684\u8f93\u5165\u963b\u6297\u4e4b\u95f4\u7684\u5339\u914d\u60c5\u51b5\u3002<\/p>\n<h2 id=\"toc18\">\u5206\u538b\u7535\u8def\u7684\u4e3b\u8981\u7528\u9014<\/h2>\n<p>\u4e86\u89e3\u5206\u538b\u7535\u8def\u7684\u5e94\u7528\u65b9\u5f0f\uff0c\u6709\u52a9\u4e8e\u6df1\u5316\u5bf9\u7535\u8def\u8bbe\u8ba1\u6574\u4f53\u7684\u7406\u89e3\u3002\u672c\u8282\u5c06\u4ecb\u7ecd\u5177\u6709\u4ee3\u8868\u6027\u7684\u5e94\u7528\u573a\u666f\uff0c\u5305\u62ec\u57fa\u672c\u7684\u504f\u7f6e\u7535\u8def\u3001\u4f20\u611f\u5668\u8f93\u5165\u4fe1\u53f7\u8c03\u7406\u7b49\u5e38\u89c1\u7528\u9014\u3002<\/p>\n<h3 id=\"toc19\">\u6676\u4f53\u7ba1\u7535\u8def\u7684\u504f\u7f6e<\/h3>\n<p>\u8981\u5c06\u6676\u4f53\u7ba1\u5e03\u7f6e\u5728\u6240\u9700\u7684\u5de5\u4f5c\u70b9\uff08\u504f\u7f6e\u70b9\uff09\uff0c\u9700\u8981\u7a33\u5b9a\u5730\u63d0\u4f9b\u57fa\u6781\u7535\u538b\u6216\u6805\u6781\u7535\u538b\u3002\u7531\u7535\u963b\\(R_1\\)\u548c\\(R_2\\)\u4e32\u8054\u6784\u6210\u7684\u5206\u538b\u7535\u8def\uff0c\u662f\u975e\u5e38\u57fa\u7840\u7684\u83b7\u53d6\u7a33\u5b9a\u5206\u538b\u6bd4\u5e76\u4e3a\u6676\u4f53\u7ba1\u7684\u57fa\u6781\uff08\u6216\u6805\u6781\uff09\u63d0\u4f9b\u504f\u7f6e\u7535\u538b\u7684\u65b9\u6cd5\u3002\u867d\u7136\u8fd9\u79cd\u65b9\u6cd5\u53ef\u80fd\u4f1a\u56e0\u57fa\u6781\u7535\u6d41\u548c\u6e29\u5ea6\u53d8\u5316\u7b49\u56e0\u7d20\u800c\u504f\u79bb\u7406\u60f3\u503c\uff0c\u4f46\u5728\u6a21\u62df\u7535\u8def\u4e2d\u4ecd\u88ab\u5e7f\u6cdb\u91c7\u7528\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/10-biasing-in-transistor-circuit.png\" alt=\"\u6676\u4f53\u7ba1\u7535\u8def\u7684\u504f\u7f6e\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc20\">\u4f20\u611f\u5668\u8f93\u51fa\u7684\u8c03\u8282<\/h3>\n<p>\u5f53\u4f20\u611f\u5668\u7684\u6a21\u62df\u8f93\u51fa\u8d85\u51fa\u5fae\u63a7\u5236\u5668\u5bb9\u8bb8\u7684\u8f93\u5165\u8303\u56f4\u65f6\uff0c\u53ef\u901a\u8fc7\u5206\u538b\u7535\u8def\u5c06\u5176\u964d\u81f3\u5b89\u5168\u6c34\u5e73\u3002\u4f8b\u5982\uff0c\u5f53\u9700\u8981\u5c06\u6700\u5927\u8f93\u51fa\u4e3a12V\u7684\u4f20\u611f\u5668\u63a5\u5165\u4ec5\u652f\u63015V\u7684ADC\u65f6\uff0c\u901a\u8fc7\u8c03\u8282\u7535\u963b\\(R_1\\)\u548c\\(R_2\\)\u7684\u963b\u503c\u6bd4\u4f8b\uff0c\u6309\u4e0b\u9762\u516c\u5f0f\u6765\u8bbe\u5b9a\u5373\u53ef\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(\\displaystyle \\frac{R_2}{R_1+R_2}\u00d712=5\\)<\/span><\/p>\n<p>\u3068\u306a\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3059\u308c\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/11-scaling-sensor-output.png\" alt=\"\u4f20\u611f\u5668\u8f93\u51fa\u7684\u8c03\u8282\" width=\"700\" height=\"394\" \/><\/p>\n<h3 id=\"toc21\">\u5176\u4ed6\u7528\u9014<\/h3>\n<p><strong>\u7535\u538b\u76d1\u6d4b\u548c\u4eea\u8868\u7535\u8def<\/strong><br \/>\n\u5728\u7535\u6e90\u76d1\u6d4b\u548c\u4eea\u8868\u7535\u8def\u7b49\u5e94\u7528\u4e2d\uff0c\u5f53\u9700\u8981\u5c06\u4e0d\u540c\u7535\u538b\u7535\u5e73\u964d\u81f3\u6d4b\u91cf\u4eea\u5668\u6216ADC\u53ef\u5904\u7406\u7684\u8303\u56f4\u65f6\uff0c\u5206\u538b\u7535\u8def\u540c\u6837\u662f\u4e00\u79cd\u7b80\u4fbf\u7684\u89e3\u51b3\u65b9\u6848\u3002\u4f8b\u5982\u8981\u5c0620V\u5206\u538b\u81f35V\u65f6\uff0c\u9700\u6309\u6240\u9700\u6bd4\u4f8b\u9009\u53d6\u7535\u963b\u5e76\u8fdb\u884c\u8fde\u63a5\u3002\u4f46\u4e3a\u786e\u4fdd\u5206\u538b\u540e\u7684\u963b\u6297\u548c\u7cbe\u5ea6\uff0c\u9700\u6839\u636e\u9700\u8981\u91c7\u7528\u7f13\u51b2\u7535\u8def\u6216\u9ad8\u7cbe\u5ea6\u7535\u963b\u3002<\/p>\n<p><strong>\u7535\u5bb9\u5206\u538b\u7535\u8def<\/strong><br \/>\n\u5206\u538b\u7535\u8def\u4e0d\u4ec5\u53ef\u4ee5\u901a\u8fc7\u7535\u963b\u5b9e\u73b0\uff0c\u4e5f\u53ef\u91c7\u7528\u7535\u5bb9\u5668\u4e32\u8054\u65b9\u5f0f\u6784\u6210\u7535\u5bb9\u5206\u538b\u7535\u8def\u3002\u8fd9\u79cd\u65b9\u5f0f\u5177\u6709\u53ef\u6839\u636e\u9891\u7387\u7279\u6027\u5206\u5272\u4fe1\u53f7\u548c\u7535\u538b\u7684\u4f18\u52bf\uff0c\u5e38\u88ab\u5e94\u7528\u4e8e\u9ad8\u9891\u7535\u8def\u7b49\u573a\u666f\u3002\u7136\u800c\uff0c\u7531\u4e8e\u7535\u5bb9\u5668\u7684\u7535\u6297\u4f1a\u968f\u9891\u7387\u53d8\u5316\u800c\u53d8\u5316\uff0c\u4ece\u800c\u4f7f\u5206\u538b\u6bd4\u4e5f\u968f\u4e4b\u6539\u53d8\uff0c\u56e0\u6b64\u9700\u8981\u8003\u8651\u5230\u76ee\u6807\u9891\u6bb5\u7684\u7279\u6027\u8fdb\u884c\u8bbe\u8ba1\u3002\u4e0e\u7535\u963b\u5206\u538b\u4e0d\u540c\uff0c\u5176\u5728\u76f4\u6d41\u9886\u57df\u7684\u529f\u8017\u8f83\u4f4e\uff0c\u4f46\u53ef\u80fd\u53d1\u751f\u5176\u4ed6\u590d\u6742\u95ee\u9898\u3002<\/p>\n<h2 id=\"toc22\">\u5206\u538b\u7535\u8def\u4e0e\u5176\u4ed6\u7535\u8def\u5143\u4ef6\u7684\u7ec4\u5408<\/h2>\n<p>\u5206\u538b\u7535\u8def\u4e0d\u4ec5\u53ef\u4ee5\u5355\u72ec\u4f7f\u7528\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4e0e\u8fd0\u7b97\u653e\u5927\u5668\u3001\u6676\u4f53\u7ba1\u7b49\u6709\u6e90\u5668\u4ef6\u7ec4\u5408\u642d\u914d\uff0c\u5b9e\u73b0\u66f4\u7075\u6d3b\u7684\u8bbe\u8ba1\u3002\u672c\u8282\u5c06\u4ecb\u7ecd\u5229\u7528\u5206\u538b\u7535\u8def\u4f5c\u4e3a\u7f13\u51b2\u7535\u8def\u548c\u53cd\u9988\u56de\u8def\u7684\u793a\u4f8b\u3002<\/p>\n<h3 id=\"toc23\">\u4e0e\u8fd0\u7b97\u653e\u5927\u5668\u76f8\u7ed3\u5408\u7684\u7f13\u51b2\u7535\u8def<\/h3>\n<p>\u5c06\u5206\u538b\u7535\u8def\u7684\u8f93\u51fa\u63a5\u5165\u8fd0\u7b97\u653e\u5927\u5668\u7684\u9ad8\u8f93\u5165\u963b\u6297\u540c\u76f8\u8f93\u5165\u7aef\uff0c\u4f7f\u5176\u4f5c\u4e3a\u7535\u538b\u8ddf\u968f\u5668\uff08\u7f13\u51b2\u5668\uff09\u5de5\u4f5c\u65f6\uff0c\u6d41\u5165\u8f93\u5165\u7aef\u7684\u7535\u6d41\u53ef\u63a7\u5236\u5728\u6570\\(p\\)A\uff5e\\(n\\)A\u7684\u7a0b\u5ea6\uff08\u5728\u8f93\u5165\u7535\u963b\u8ba1\u7b97\u4e2d\u8d85\u8fc7\u6570\\(G\\)\u03a9\uff09\u3002\u56e0\u6b64\u4ece\u5206\u538b\u70b9\u6765\u770b\uff0c\u51e0\u4e4e\u4e0d\u5b58\u5728\u8d1f\u8f7d\uff0c\u6d41\u8fc7\u7684\u4ec5\u662f\u7b49\u4e8e\\(V_{IN}\\) \/(\\(R_1\\)+\\(R_2\\))\u7684\u9759\u6001\u7535\u6d41\uff0c\u4ee5\u53ca\u975e\u5e38\u5fae\u5c0f\u7684\u8f93\u5165\u504f\u7f6e\u7535\u6d41\u3002\u7531\u6b64\uff0c\u53ef\u5927\u5927\u964d\u4f4e\u8d1f\u8f7d\u7535\u963b\u5bf9\u5206\u538b\u6bd4\u7684\u5f71\u54cd\u3002<\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/12-op-amp-buffering-and-voltage-divider.png\" alt=\"\u4e0e\u8fd0\u7b97\u653e\u5927\u5668\u76f8\u7ed3\u5408\u7684\u7f13\u51b2\u7535\u8def\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u6211\u4eec\u518d\u770b\u5e0c\u671b\u5728\\(R_1\\)=2k\u03a9, \\(R_2\\)=3k\u03a9, \\(V_IN\\) =5V\u7684\u6761\u4ef6\u4e0b\u83b7\u5f973V\u8f93\u51fa\uff0c\u4f46\u5f53\u76f4\u63a5\u65bd\u52a0\\(R_L\\)=1k\u03a9\u7684\u8d1f\u8f7d\u65f6\uff0c\u8f93\u51fa\u7535\u538b\u5c06\u663e\u8457\u4e0b\u964d\u7684\u60c5\u51b5\u3002\u5728\u5176\u4e2d\u63d2\u5165\u8fd0\u653e\u7684\u7535\u538b\u8ddf\u968f\u5668\u540e\uff0c\u8d1f\u8f7d\u7535\u6d41\u5c06\u7531\u8fd0\u653e\u4f9b\u7ed9\uff0c\u800c\u5206\u538b\u7535\u8def\u81ea\u8eab\u7684\u7535\u6d41\u5c06\u53d8\u5f97\u975e\u5e38\u5c0f\uff0c\u56e0\u6b64\\(V_{OUT}\\)\u80fd\u7a33\u5b9a\u4fdd\u6301\u57283V\u5de6\u53f3\u3002<\/p>\n<h3 id=\"toc24\">\u53cd\u9988\u7535\u8def\u4e0e\u5206\u538b<\/h3>\n<p>\u5728\u7535\u6e90\u7535\u8def\u548c\u63a7\u5236\u7535\u8def\u4e2d\uff0c\u5728\u901a\u8fc7\u76d1\u6d4b\u548c\u6bd4\u8f83\u8f93\u51fa\u7535\u538b\u6765\u8bbe\u5b9a\u76ee\u6807\u7535\u538b\u7684\u53cd\u9988\u8def\u5f84\u4e2d\uff0c\u6709\u65f6\u4f1a\u4f7f\u7528\u5206\u538b\u7535\u8def\u3002\u4f8b\u5982\uff0c\u5728\u7ebf\u6027\u7a33\u538b\u5668\u548c\u5f00\u5173\u7a33\u538b\u5668\u4e2d\uff0c\u901a\u8fc7\u5c06\u8f93\u51fa\u7535\u538b\u5206\u538b\u5e76\u4e0e\u5185\u7f6e\u7684\u57fa\u51c6\u7535\u538b\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ece\u800c\u4f7f\u7ef4\u6301\u8f93\u51fa\u6052\u5b9a\u7684\u5de5\u4f5c\u673a\u5236\u5f97\u4ee5\u8fd0\u884c\u3002<\/p>\n<p>\u5728\u5178\u578b\u7684\u7ebf\u6027\u7a33\u538b\u5668\u4e2d\uff0c\u7531\u4e8e\u5185\u90e8\u53cd\u9988\u5f15\u811a\u4fdd\u6301\u57281.25V\uff0c\u56e0\u6b64\u53ef\u901a\u8fc7\u4e0b\u9762\u7684\u516c\u5f0f\u4efb\u610f\u8bbe\u5b9a\u8f93\u51fa\u7535\u538b\\(V_{OUT}\\)\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(V_{OUT}=1.25\\begin{pmatrix}1+\\displaystyle \\frac{R_2}{R_1}\\end{pmatrix}\\)<\/span><\/p>\n<p><!-- \u753b\u50cf --><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/techclass.wfjydl.com\/wp-content\/uploads\/2026\/01\/13-feedback-circuit-using-voltage-divider.png\" alt=\"\u53cd\u9988\u7535\u8def\u4e0e\u5206\u538b\" width=\"700\" height=\"394\" \/><\/p>\n<p>\u4f8b\u5982\uff0c\u5e0c\u671b\u5c06\u8f93\u51fa\u7535\u538b\u8bbe\u5b9a\u4e3a5V\u65f6\uff0c\u4e3a\uff1a<\/p>\n<p><!-- \u6570\u5f0f --><\/p>\n<p><span class=\"mathjax-text\">\\(5=1.25\\begin{pmatrix}1+\\displaystyle \\frac{R_2}{R_1}\\end{pmatrix}\u27f9\\displaystyle\\frac{R_2}{R_1}=3\\)<\/span><\/p>\n<p>\u56e0\u6b64\uff0c\u7535\u963b\u7684\u6bd4\u4f8b\u53ef\u4ee5\u9009\u62e9\u4e3a\\(R_1\\)\uff1a\\(R_2\\)=1\uff1a3\uff08\u4f8b\u598210k\u03a9\u548c30k\u03a9\uff09\u3002\u5982\u4e0a\u6240\u8ff0\uff0c\u901a\u8fc7\u8c03\u6574\u7535\u963b\u6bd4\u8fdb\u884c\u5206\u538b\uff0c\u5373\u53ef\u8bbe\u5b9a\u6240\u9700\u7684\u8f93\u51fa\u7535\u538b\u3002<\/p>\n<h3 id=\"toc25\">\u7a33\u538b\u5668\u4e2d\u7684\u5206\u538b<\/h3>\n<p>\u65e0\u8bba\u662f\u7ebf\u6027\u7a33\u538b\u5668\u8fd8\u662f\u5f00\u5173\u7a33\u538b\u5668\uff0c\u90e8\u5206\u7a33\u538b\u5668\u901a\u8fc7\u5916\u7f6e\u6216\u5185\u7f6e\u7684\u5206\u538b\u7535\u8def\u6765\u786e\u5b9a\u8bbe\u5b9a\u7535\u538b\u3002\u7ed9\u53cd\u9988\u5f15\u811a\u6216\u68c0\u6d4b\u5f15\u811a\u8f93\u5165\u5206\u538b\u540e\u7684\u8f93\u51fa\u7535\u538b\uff0c\u7a33\u538b\u5668\u5c06\u8be5\u7535\u538b\u4e0e\u5185\u90e8\u57fa\u51c6\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ece\u800c\u63a7\u5236\u8f93\u51fa\u3002\u5982\u679c\u6d41\u8fc7\u5206\u538b\u7535\u963b\u7684\u7535\u6d41\u8fc7\u5c0f\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7a33\u538b\u5668\u65e0\u6cd5\u7a33\u5b9a\u5de5\u4f5c\uff0c\u56e0\u6b64\u67e5\u9605\u624b\u518c\u5e76\u786e\u8ba4\u5176\u4e2d\u63a8\u8350\u7684\u7535\u6d41\u503c\u548c\u7535\u963b\u503c\u8303\u56f4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"toc26\">\u5206\u538b\u7535\u8def\u603b\u7ed3<\/h2>\n<p>\u5206\u538b\u7535\u8def\u662f\u901a\u8fc7\u7535\u963b\u503c\u7684\u6bd4\u4f8b\u6765\u5206\u5272\u8f93\u5165\u7535\u538b\u7684\u4e00\u79cd\u7b80\u5355\u65b9\u6cd5\u3002\u5728\u6676\u4f53\u7ba1\u504f\u7f6e\u7535\u8def\u3001\u4f20\u611f\u5668\u4fe1\u53f7\u8c03\u7406\u3001\u9ad8\u7535\u538b\u76d1\u6d4b\u7b49\u5e7f\u6cdb\u9886\u57df\u5747\u6709\u5e94\u7528\u3002\u5728\u5b9e\u9645\u8bbe\u8ba1\u4e2d\uff0c\u9700\u8981\u5145\u5206\u8003\u8651\u8d1f\u8f7d\u7684\u5f71\u54cd\u3001\u6e29\u5ea6\u7cfb\u6570\u3001\u516c\u5dee\u7b49\u5de5\u4f5c\u76f8\u5173\u7684\u56e0\u7d20\u3002\u53e6\u5916\uff0c\u901a\u8fc7\u91c7\u7528\u8fd0\u7b97\u653e\u5927\u5668\u8fdb\u884c\u7f13\u51b2\u6216\u5d4c\u5165\u53cd\u9988\u56de\u8def\uff0c\u8fd8\u53ef\u63d0\u9ad8\u5206\u538b\u7535\u8def\u7684\u7a33\u5b9a\u6027\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u5c3d\u7ba1\u7ed3\u6784\u7b80\u5355\uff0c\u4f46\u5176\u5e94\u7528\u5374\u975e\u5e38\u5e7f\u6cdb\uff0c\u662f\u7535\u5b50\u7535\u8def\u8bbe\u8ba1\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u57fa\u7840\u7535\u8def\u3002\u6b63\u786e\u7406\u89e3\u539f\u7406\uff0c\u5e76\u6839\u636e\u4f7f\u7528\u73af\u5883\u548c\u76ee\u7684\u6070\u5f53\u9009\u62e9\u9002\u5408\u7684\u5143\u5668\u4ef6\u975e\u5e38\u91cd\u8981\u3002\u6b64\u5916\uff0c\u6839\u636e\u9700\u6c42\uff0c\u7ed3\u5408\u6e29\u5ea6\u8865\u507f\u548c\u9694\u79bb\u6280\u672f\u7b49\uff0c\u53ef\u5b9e\u73b0\u5b89\u5168\u7a33\u5b9a\u7684\u8bbe\u8ba1\u3002\u76f8\u4fe1\u5927\u5bb6\u638c\u63e1\u5206\u538b\u7535\u8def\u540e\uff0c\u5c06\u80fd\u4ee5\u66f4\u5e7f\u9614\u7684\u89c6\u89d2\u628a\u63e1\u6574\u4e2a\u7535\u8def\uff0c\u4ece\u800c\u5728\u5404\u79cd\u5e94\u7528\u573a\u666f\u4e2d\u53d1\u6325\u5176\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5206\u538b\u7535\u8def\u662f\u4e00\u79cd\u901a\u8fc7\u7ed3\u5408\u7535\u963b\u7b49\u5143\u4ef6\u5c06\u8f93\u5165\u7535\u538b\u8f6c\u6362\u4e3a\u6240\u9700\u8f93\u51fa\u7535\u538b\u7684\u7535\u8def\u3002\u901a\u8fc7\u7535\u963b\u503c\u6bd4\u4f8b\u6765\u63a7\u5236\u8f93\u51fa\u7535\u538b\uff0c\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7535\u5b50\u8bbe\u5907\u7684\u5de5\u4f5c\u7535\u538b\u8c03\u6574\u7528\u9014\u3002\u4f8b\u5982\uff0c\u53ef\u7528\u4e8e\u9632\u6b62LED\u6216\u4f20\u611f\u5668\u88ab\u65bd\u52a0\u8fc7\u9ad8\u7535\u538b\uff0c\u786e\u4fdd\u5b89\u5168\u8fd0\u884c\u7b49\u7528\u9014\u3002\u5206\u538b\u7535\u8def\u662f\u7535\u8def\u8bbe [&hellip;]","protected":false},"author":4,"featured_media":28604,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2448],"tags":[],"class_list":["post-28658","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-10-s-si"],"acf":[],"wps_subtitle":"","_links":{"self":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/28658","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/comments?post=28658"}],"version-history":[{"count":11,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/28658\/revisions"}],"predecessor-version":[{"id":28708,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/posts\/28658\/revisions\/28708"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media\/28604"}],"wp:attachment":[{"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/media?parent=28658"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/categories?post=28658"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techclass.wfjydl.com\/wp-json\/wp\/v2\/tags?post=28658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}