{"id":730,"date":"2026-10-04T21:59:02","date_gmt":"2026-10-04T13:59:02","guid":{"rendered":"https:\/\/jncircuit.com\/?p=730"},"modified":"2026-10-04T21:59:02","modified_gmt":"2026-10-04T13:59:02","slug":"op-amp-filter","status":"publish","type":"post","link":"https:\/\/jncircuit.com\/index.php\/2026\/10\/04\/op-amp-filter","title":{"rendered":"\u5f53\u8fd0\u7b97\u653e\u5927\u5668\u9047\u4e0a\u6ee4\u6ce2\u5668\uff1a\u597d\u5144\u5f1f\u4e00\u8f88\u5b50"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e0a\u4e00\u7bc7\u4ecb\u7ecd\u4e86\u8fd0\u7b97\u653e\u5927\u5668\u7684\u6982\u5ff5\u4ee5\u53ca\u52a0\u51cf\u6cd5\u8fd0\u7b97\uff0c\u53ef\u4ee5\u56de\u987e<strong>\u300a<\/strong><a href=\"https:\/\/jncircuit.com\/index.php\/2026\/10\/04\/operational-amplifier\" target=\"_blank\" rel=\"noopener\">\u200b<strong>\u7535\u5b50\u6280\u672f\u7684\u91cc\u7a0b\u7891\uff0c\u5e26\u4f60\u8d70\u8fdb\u8fd0\u7b97\u653e\u5927\u5668\u7684\u5947\u5999\u4e16\u754c<\/strong><\/a><strong>\u300b<\/strong>\u3002\u4ece\u8fd9\u7bc7\u5f00\u59cb\uff0c\u8fd0\u653e\u5c31\u4e0d\u518d\u5b64\u5355\u4e86\uff0c\u4eca\u5929\u8981\u51fa\u573a\u7684\u662f\u5b83\u7684\u4eb2\u5144\u5f1f\uff1a<strong>\u6ee4\u6ce2\u5668<\/strong>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u589e\u52a0\u4e86\u6ee4\u6ce2\u5668\u7684\u540c\u76f8\u914d\u7f6e<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"449\" src=\"https:\/\/img.jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-d6064f8a5ddc63df9c221aa2d794ad5f_720w.jpg\" alt=\"\" class=\"wp-image-731\" style=\"aspect-ratio:1.6047548291233285;width:1080px;height:auto\" srcset=\"https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-d6064f8a5ddc63df9c221aa2d794ad5f_720w.jpg 720w, https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-d6064f8a5ddc63df9c221aa2d794ad5f_720w-300x187.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u7684\u8fd0\u653e\u5728\u7b80\u5355\u7684\u540c\u76f8\u63a5\u6cd5\u7684\u57fa\u7840\u4e0a\u589e\u52a0\u4e86Cf\u6ee4\u6ce2\u5668\uff0c\u6211\u4eec\u90fd\u77e5\u9053\u7535\u5bb9\u5668\u5177\u6709\u201c<strong>\u901a\u4ea4\u6d41<\/strong>\u201d\u7684\u7279\u6027\uff0c\u4f46\u662f\u4ea4\u6d41\u4fe1\u53f7\u7684\u9891\u7387\u6709\u9ad8\u6709\u4f4e\uff0c\u591a\u5927\u7684\u9891\u7387\u624d\u80fd\u201c\u901a\u8fc7\u201d\u7535\u5bb9\u5668\u5462\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"344\" src=\"https:\/\/img.jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-198ef8b418cfb93bb4aa46a18cd4ce40_720w-1.jpg\" alt=\"\" class=\"wp-image-732\" style=\"aspect-ratio:2.091764705882353;width:889px;height:auto\" srcset=\"https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-198ef8b418cfb93bb4aa46a18cd4ce40_720w-1.jpg 720w, https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-198ef8b418cfb93bb4aa46a18cd4ce40_720w-1-300x143.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u7535\u5bb9\u5668\u5b9e\u9645\u6a21\u578b<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u8981\u4ece\u7535\u5bb9\u5668\u7684\u57fa\u7840\u6a21\u578b\u8bb2\u8d77\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u5e38\u7528\u7684\u53c2\u6570\uff1a<strong>\u7b49\u6548\u4e32\u8054\u7535\u963b\uff08ESR\uff09\uff0c\u5b83\u968f\u7740\u4fe1\u53f7\u9891\u7387\u7684\u589e\u5927\u800c\u53d8\u5c0f<\/strong>\u3002\u5f53\u4fe1\u53f7\u9891\u7387\u63a5\u8fd1\u7535\u5bb9\u5668\u7684\u201c\u622a\u6b62\u201d\u9891\u7387\uff08-3dB\u6eda\u964d\u70b9\uff09\u65f6\uff0c\u7535\u5bb9\u5668\u7684ESR\u5f00\u59cb\u5feb\u901f\u53d8\u5c0f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7535\u5bb9\u5668\u622a\u6b62\u9891\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>fc=1\/\uff082\u03c0\u2716Rf\u2716Cf\uff09<\/strong>\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5047\u8bbe\u4fe1\u53f7\u9891\u7387\u8fdc\u8fdc\u4f4e\u4e8e\u7535\u5bb9\u5668\u7684\u8c10\u632f\u9891\u7387\uff08f\uff1c\uff1cfc\uff09\uff0c\u53ef\u4ee5\u628a\u7535\u5bb9\u5668\u7684ESR\u8fd1\u4f3c\u770b\u6210\u65e0\u7a77\u5927<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u653e\u7684\u589e\u76ca\uff08G\uff09\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>G=Rf\/R1+1<\/strong>\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5047\u8bbe\u4fe1\u53f7\u9891\u7387\u8fbe\u5230\u751a\u81f3\u8d85\u8fc7\u4e86\u7535\u5bb9\u5668\u7684\u622a\u6b62\u9891\u7387\uff08f\uff1e\uff1efc\uff09\uff0c\u5728\u7535\u8def\u4e2d\u53ef\u4ee5\u628aCf\u770b\u6210\u662f\u4e00\u4e2a\u4e0eRf\u5e76\u8054\u7684\u7535\u963b\uff08ESR\uff09<\/strong>\uff0c\u968f\u7740ESR\u7684\u9010\u6e10\u51cf\u5c0f\uff0cRf\/R1\u7684\u6bd4\u503c\u4e5f\u5728\u53d8\u5c0f\uff0c\u5bfc\u81f4\u8fd0\u653e\u7684\u589e\u76ca\u4e0b\u964d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"439\" src=\"https:\/\/img.jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-396081f4d0afb97a84ae7fdaf648726a_720w.jpg\" alt=\"\" class=\"wp-image-733\" style=\"aspect-ratio:1.6388467374810318;width:1080px;height:auto\" srcset=\"https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-396081f4d0afb97a84ae7fdaf648726a_720w.jpg 720w, https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-396081f4d0afb97a84ae7fdaf648726a_720w-300x183.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u968f\u7740ESR\u7684\u4e0d\u65ad\u51cf\u5c0f\uff0c\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u5230\u572810KHz~100KHz\u7684\u9891\u7387\u8303\u56f4\u5185\uff0c\u8fd0\u653e\u589e\u76ca\u8fc5\u901f\u4e0b\u964d\uff1b<strong>\u5f53ESR\u63a5\u8fd10\u65f6\uff0c\u8be5\u8fd0\u653e\u7535\u8def\u53d8\u6210\u7535\u538b\u8ddf\u968f\u5668\uff0c\u6b64\u65f6\u589e\u76ca\u4e3a0\uff081:1\u4fe1\u53f7\u653e\u5927\uff09<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u968f\u7740\u4fe1\u53f7\u9891\u7387\u7ee7\u7eed\u589e\u52a0\uff0c\u6700\u540e\u8fbe\u5230\u4e86\u8fd0\u653e\u7684\u5e26\u5bbd\u9650\u5236\uff0c\u6b64\u65f6\u7684\u589e\u76ca\u5c31\u975e\u5e38\u5c0f\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>\u589e\u52a0\u4e86\u6ee4\u6ce2\u5668\u7684\u53cd\u5411\u914d\u7f6e<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"416\" src=\"https:\/\/img.jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-25e67f07d432309a9a31c7bad017dff6_720w.jpg\" alt=\"\" class=\"wp-image-734\" style=\"aspect-ratio:1.7327731092436975;width:1031px;height:auto\" srcset=\"https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-25e67f07d432309a9a31c7bad017dff6_720w.jpg 720w, https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-25e67f07d432309a9a31c7bad017dff6_720w-300x173.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e86\u89e3\u6e05\u695a\u540c\u76f8\u914d\u7f6e\u4ee5\u540e\uff0c\u6211\u4eec\u63a5\u7740\u6765\u770b\u53cd\u5411\u914d\u7f6e\u3002<strong>\u6839\u636e\u8fd0\u653e\u8f93\u5165\u7aef\u7535\u538b\u76f8\u7b49\uff08\u52a8\u6001\u5e73\u8861\uff09\u539f\u5219\uff0c\u5f53\u4fe1\u53f7\u9891\u7387\u4f4e\u4e8e\u7535\u5bb9\u5668\u7684\u622a\u6b62\u9891\u7387\uff08f\uff1cfc\uff09\u65f6\uff0c\u53ef\u4ee5\u6682\u65f6\u5ffd\u7565Cf\u7684\u5b58\u5728<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\u8fd0\u653e\u7684\u589e\u76ca\uff08G\uff09\u8ba1\u7b97\u65b9\u6cd5\u4e3a\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>G=\uff0dRf\/R1<\/strong>\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7535\u5bb9\u5668\u622a\u6b62\u9891\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e0e\u540c\u76f8\u7684\u8ba1\u7b97\u65b9\u6cd5\u4e00\u81f4\uff0c\u622a\u6b62\u9891\u7387\u4e0e\u7535\u5bb9\u5668\u672c\u8eab\u7279\u6027\u548cRf\u6709\u5173\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>fc=1\/\uff082\u03c0\u2716Rf\u2716Cf\uff09<\/strong>\uff1b<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"431\" src=\"https:\/\/img.jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-5e9928f1c8d86ba59f8f510b3423460a_720w.jpg\" alt=\"\" class=\"wp-image-735\" style=\"aspect-ratio:1.669242658423493;width:1080px;height:auto\" srcset=\"https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-5e9928f1c8d86ba59f8f510b3423460a_720w.jpg 720w, https:\/\/jncircuit.com\/wp-content\/uploads\/2026\/10\/v2-5e9928f1c8d86ba59f8f510b3423460a_720w-300x180.jpg 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e\u540c\u76f8\u914d\u7f6e\u7684\u9891\u7387\u54cd\u5e94\u7a0d\u5fae\u6709\u4e9b\u533a\u522b\uff0c\u5f53\u8f93\u5165\u4fe1\u53f7\u7684\u9891\u7387\u5230\u8fbe\u7535\u5bb9\u5668\u7684\u622a\u6b62\u9891\u70b9\u65f6\uff0c\u8fd0\u653e\u589e\u76ca\u540c\u6837\u4f1a\u8fc5\u901f\u4e0b\u964d\u3002<strong>\u5bf9\u6bd4\u540c\u76f8\u7684\u9891\u54cd\u66f2\u7ebf\uff0c\u5f53\u4fe1\u53f7\u9891\u7387\u57281MHz\u5de6\u53f3\u65f6\uff0c\u5e76\u672a\u51fa\u73b00\u589e\u76ca\u7684\u5e73\u53f0<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u53cd\u76f8\u914d\u7f6e\u7684\u7535\u8def\u7ed3\u6784\u4e0d\u540c\uff0c<strong>\u5f53ESR\uff08\u7535\u5bb9Cf\u7684\u7b49\u6548\u4e32\u8054\u7535\u963b\uff09\u4e0eRf\u7684\u5e76\u8054\u7535\u963b\u63a5\u8fd10\u65f6\uff0c\u7531\u4e8e\u8fd0\u653e\u6b63\u5411\u63a5\u5730\uff0c\u56e0\u6b64\u8f93\u51fa\u57fa\u672c\u4e3a0<\/strong>\uff0c\u8fd0\u653e\u7684\u589e\u76ca\u5f88\u4f4e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6700\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u8fd9\u4e24\u79cd\u8fd0\u653e\u7535\u8def\u7684\u7279\u70b9\uff0c\u9002\u5f53\u8c03\u6574Cf\u6ee4\u6ce2\u5668\u7684\u622a\u6b62\u9891\u7387\uff0c\u5373\u53ef\u5728\u53ef\u63a7\u7684\u8303\u56f4\u5185\u8ba9\u6709\u7528\u7684\u4fe1\u53f7\u653e\u5927\uff0c\u628a\u4e00\u90e8\u5206\u5e72\u6270\u4fe1\u53f7\u7684\u589e\u76ca\u5c3d\u53ef\u80fd\u7684\u964d\u4f4e\uff0c\u8fd9\u5c31\u662f\u8fd0\u653e\u521d\u6b65\u7684\u964d\u566a\u6280\u672f<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u5728\u5b9e\u9645\u7535\u8def\u5e94\u7528\u4e2d\uff0c\u8fd0\u7b97\u653e\u5927\u5668\u4e0e\u6ee4\u6ce2\u5668\uff0c\u65e0\u8bba\u5c11\u4e86\u8c01\u90fd\u4e0d\u5b8c\u6574\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0a\u4e00\u7bc7\u4ecb\u7ecd\u4e86\u8fd0\u7b97\u653e\u5927\u5668\u7684\u6982\u5ff5\u4ee5\u53ca\u52a0\u51cf\u6cd5\u8fd0\u7b97\uff0c\u53ef\u4ee5\u56de\u987e\u300a\u200b\u7535\u5b50\u6280\u672f\u7684\u91cc\u7a0b\u7891\uff0c\u5e26\u4f60\u8d70\u8fdb\u8fd0\u7b97\u653e\u5927\u5668\u7684\u5947\u5999\u4e16\u754c\u300b\u3002\u4ece\u8fd9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":731,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,58,51],"tags":[59,37,52],"class_list":["post-730","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electronic-components","category-filter","category-operational-amplifier","tag-filtering","tag-capacitor","tag-opamp"],"_links":{"self":[{"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/posts\/730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/comments?post=730"}],"version-history":[{"count":1,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/posts\/730\/revisions"}],"predecessor-version":[{"id":736,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/posts\/730\/revisions\/736"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/media\/731"}],"wp:attachment":[{"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/media?parent=730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/categories?post=730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/jncircuit.com\/index.php\/wp-json\/wp\/v2\/tags?post=730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}