{"id":8160,"date":"2025-12-19T06:48:00","date_gmt":"2025-12-18T21:48:00","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=8160"},"modified":"2026-10-04T11:27:51","modified_gmt":"2026-10-04T02:27:51","slug":"lpf-%ec%a0%95%eb%a6%ac","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/lpf-%ec%a0%95%eb%a6%ac\/","title":{"rendered":"LPF \uc815\ub9ac"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1060\" height=\"1080\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/image-7.png\" alt=\"\" class=\"wp-image-8161\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/image-7.png 1060w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/image-7-768x782.png 768w\" sizes=\"auto, (max-width: 1060px) 100vw, 1060px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1702\" height=\"2327\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page.png\" alt=\"\" class=\"wp-image-8162\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page.png 1702w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page-1498x2048.png 1498w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page-768x1050.png 768w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page-1123x1536.png 1123w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_006-Page-1568x2144.png 1568w\" sizes=\"auto, (max-width: 1702px) 100vw, 1702px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1702\" height=\"2327\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page.png\" alt=\"\" class=\"wp-image-8163\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page.png 1702w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page-1498x2048.png 1498w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page-768x1050.png 768w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page-1123x1536.png 1123w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2025\/12\/NeoStudio_20251218_224517_\uc0b0\uc5c5\uacc4\uce21\uc81c\uc5b4-\uae30\uc220\uc0ac-17_007-Page-1568x2144.png 1568w\" sizes=\"auto, (max-width: 1702px) 100vw, 1702px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">SI, PI, EMI 90page<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-now-0930 wp-block-embed-now-0930\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"lLFIC2HaGZ\"><a href=\"https:\/\/now0930.pe.kr\/wordpress\/bode-plot-bode-diagram\/\">Bode Plot, Bode Diagram<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201cBode Plot, Bode Diagram\u201d \u2014 now0930 \uc77c\uc9c0\" src=\"https:\/\/now0930.pe.kr\/wordpress\/bode-plot-bode-diagram\/embed\/#?secret=1llDVXO5Z8#?secret=lLFIC2HaGZ\" data-secret=\"lLFIC2HaGZ\" width=\"580\" height=\"327\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n&#8220;`html\n<div class=\"chapter19-wide\">\n\n  <h1>LPF \uc815\ub9ac<\/h1>\n\n  <div class=\"subtitle\">\n    Low Pass Filter \u00b7 Bode Plot \u00b7 -20 dB\/dec \u00b7 LC Filter \u00b7 T Type \u00b7 \u03c0 Type\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>1. \ud544\ud130\uc758 \uc885\ub958\ubcc4 \ud2b9\uc131<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\ub294 \uc218\ub3d9\uc18c\uc790 L, C\ub97c \uc774\uc6a9\ud55c\n      \ud544\ud130 \uad6c\uc870\uc640 \ucc28\ub2e8\uc601\uc5ed\uc758 \uae30\uc6b8\uae30\ub97c \ube44\uad50\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"table-wrap\">\n\n      <table>\n\n        <thead>\n          <tr>\n            <th>\ud544\ud130 \uad6c\uc131<\/th>\n            <th>\ud615\ud0dc<\/th>\n            <th>\ucc28\ub2e8\uc601\uc5ed \uae30\uc6b8\uae30<\/th>\n          <\/tr>\n        <\/thead>\n\n        <tbody>\n\n          <tr>\n            <td><strong>1\uac1c \uc18c\uc790<\/strong><\/td>\n            <td>L \ub610\ub294 C<\/td>\n            <td>-20 dB\/dec<\/td>\n          <\/tr>\n\n          <tr>\n            <td><strong>2\uac1c \uc18c\uc790<\/strong><\/td>\n            <td>LC \ub610\ub294 CL<\/td>\n            <td>-40 dB\/dec<\/td>\n          <\/tr>\n\n          <tr>\n            <td><strong>3\uac1c \uc18c\uc790<\/strong><\/td>\n            <td>T \ub610\ub294 \u03c0<\/td>\n            <td>-60 dB\/dec<\/td>\n          <\/tr>\n\n        <\/tbody>\n\n      <\/table>\n\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>2. 1\ucc28 \ud544\ud130<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc6d0\ubcf8 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294\n      Inductor \ud558\ub098 \ub610\ub294 Capacitor \ud558\ub098\ub97c \uc0ac\uc6a9\ud558\ub294\n      \ud544\ud130\ub97c 1\ucc28 \ud544\ud130\ub85c \uc124\uba85\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      1\ucc28 Filter\n      \u2192\n      -20 dB\/dec\n    <\/div>\n\n    <p>\n      \ucc28\ub2e8\uc8fc\ud30c\uc218 f<sub>c<\/sub>\uc5d0\uc11c\n      Gain\uc740 \uc57d -3 dB\ub85c \ud45c\uc2dc\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>3. Inductor\ub97c \uc774\uc6a9\ud55c LPF<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      NeoStudio \ud544\uae30\uc5d0\uc11c\ub294\n      Inductor\ub97c \uc9c1\ub82c,\n      \uc800\ud56d R\uc744 \ubd80\ud558\ub85c \uc5f0\uacb0\ud55c \ud68c\ub85c\ub97c \uadf8\ub9b0\ub2e4.\n    <\/p>\n\n    <pre>\n      Vin \u2500\u2500\u2500\u2500\u2500 L \u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500 Vout\n                       \u2502\n                       R\n                       \u2502\n                      GND\n    <\/pre>\n\n    <p>\n      \ucd9c\ub825\uc804\uc555\uc740 \uc804\uc555\ubd84\ubc30 \uad00\uacc4\ub85c\n    <\/p>\n\n    <div class=\"formula\">\n      Vout\n      =\n      R \/ (sL + R)\n      \u00b7 Vin\n    <\/div>\n\n    <p>\n      \ub85c \uae30\ub85d\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>4. Inductor LPF\uc758 \uc815\uaddc\ud615<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ubd84\ubaa8\ub97c 1\ucc28 \ud45c\uc900\ud615\uc73c\ub85c \uc815\ub9ac\ud558\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      Vout \/ Vin\n      =\n      R \/ (sL + R)\n    <\/div>\n\n    <div class=\"formula\">\n      =\n      (R\/L)\n      \/\n      (s + R\/L)\n    <\/div>\n\n    <p>\n      \ub530\ub77c\uc11c\n    <\/p>\n\n    <div class=\"formula\">\n      \u03b1\n      =\n      R\/L\n    <\/div>\n\n    <p>\n      \ub85c \ub450\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      G(s)\n      =\n      \u03b1\/(s+\u03b1)\n    <\/div>\n\n    <p>\n      \uc758 1\ucc28 LPF \ud615\ud0dc\uac00 \ub41c\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>5. 1\ucc28 LPF\uc758 Bode \uae30\uc6b8\uae30<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      NeoStudio\uc5d0\uc11c\ub294\n      1\ucc28 Pole \ud558\ub098\uac00 \uc874\uc7ac\ud560 \ub54c\n      Bode Plot\uc758 \ucc28\ub2e8\uc601\uc5ed \uae30\uc6b8\uae30\uac00\n      -20 dB\/dec\uac00 \ub418\ub294 \uac83\uc744 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Pole 1\uac1c\n      \u2192\n      -20 dB\/dec\n    <\/div>\n\n    <p>\n      \uc8fc\ud30c\uc218\uac00\n      \u03c9\u2081\uc5d0\uc11c 10\u03c9\u2081\uc73c\ub85c \uc99d\uac00\ud558\uba74\n      Gain \ubcc0\ud654\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      20 log\u2081\u2080(\u03c9\u2081)\n      &#8211;\n      20 log\u2081\u2080(10\u03c9\u2081)\n      =\n      -20 log\u2081\u2080(10)\n    <\/div>\n\n    <div class=\"formula\">\n      =\n      -20 dB\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \uc8fc\ud30c\uc218\uac00 10\ubc30 \uc99d\uac00\ud560 \ub54c\n        Gain\uc774 20 dB \uac10\uc18c\ud558\ubbc0\ub85c\n        -20 dB\/dec\uc774\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>6. Capacitor\ub97c \uc774\uc6a9\ud55c LPF<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      Capacitor\ub97c \uc811\uc9c0 \ubc29\ud5a5\uc73c\ub85c \uc5f0\uacb0\ud558\uba74\n      \uace0\uc8fc\ud30c \uc131\ubd84\uc774 Capacitor\ub97c \ud1b5\ud574\n      \uc811\uc9c0 \ubc29\ud5a5\uc73c\ub85c \ube60\uc9c0\ub294 \uad6c\uc870\uac00 \ub41c\ub2e4.\n    <\/p>\n\n    <pre>\n      Vin \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500 Vout\n                      \u2502\n                      C\n                      \u2502\n                     GND\n    <\/pre>\n\n    <p>\n      \uc6d0\ubcf8\uc740 Capacitor Impedance\ub97c\n    <\/p>\n\n    <div class=\"formula\">\n      Z<sub>C<\/sub>\n      =\n      1\/(sC)\n    <\/div>\n\n    <p>\n      \ub85c \uc0ac\uc6a9\ud55c\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>7. RC \ud615\ud0dc\uc758 LPF \uad00\uacc4<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\ub294 \uc800\ud56d\uacfc Capacitor\uc758\n      \uc804\uc555\ubd84\ubc30\ub97c \uc774\uc6a9\ud558\uc5ec\n    <\/p>\n\n    <div class=\"formula\">\n      Vout\n      =\n      Vin\n      \u00b7\n      {\n      1\/(sC)\n      \\over\n      R + 1\/(sC)\n      }\n    <\/div>\n\n    <p>\n      \ud615\ud0dc\ub97c \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <p>\n      \uc774\ub97c \uc815\ub9ac\ud558\uba74\n    <\/p>\n\n    <div class=\"formula\">\n      Vout \/ Vin\n      =\n      1\/(RCs + 1)\n    <\/div>\n\n    <p>\n      \ub85c \ud45c\ud604\ud560 \uc218 \uc788\ub294\n      1\ucc28 \uc800\uc5ed\ud1b5\uacfc \ud615\ud0dc\uc774\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>8. 2\uac1c \uc18c\uc790\ub97c \uc0ac\uc6a9\ud558\ub294 \ud544\ud130<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\uc640 NeoStudio \ud544\uae30\uc5d0\uc11c\ub294\n      L\uacfc C \ub450 \uc18c\uc790\ub97c \uc870\ud569\ud55c \ud544\ud130\ub97c \ub2e4\ub8ec\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      2\uac1c Reactive Element\n      \u2192\n      2\ucc28 Filter\n      \u2192\n      -40 dB\/dec\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>9. LC Type Filter<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      LC Type\uc740\n      Inductor\uac00 \uba3c\uc800 \uc9c1\ub82c\ub85c \ubc30\uce58\ub418\uace0,\n      Capacitor\uac00 \ucd9c\ub825 \uce21\uc5d0\uc11c \uc811\uc9c0\ub85c \uc5f0\uacb0\ub41c\ub2e4.\n    <\/p>\n\n    <pre>\n      Vin \u2500\u2500\u2500\u2500\u2500 L \u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500 Vout\n                       \u2502\n                       C\n                       \u2502\n                      GND\n    <\/pre>\n\n    <div class=\"formula\">\n      L\n      \u2192\n      Series\n    <\/div>\n\n    <div class=\"formula\">\n      C\n      \u2192\n      Shunt to Ground\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>10. CL Type Filter<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\uc5d0\ub294\n      Capacitor\uac00 \uba3c\uc800 \uc811\uc9c0\ub85c \uc5f0\uacb0\ub418\uace0\n      \uc774\ud6c4 Inductor\uac00 \uc9c1\ub82c\ub85c \ubc30\uce58\ub418\ub294\n      CL Type\ub3c4 \ud568\uaed8 \uadf8\ub824\uc838 \uc788\ub2e4.\n    <\/p>\n\n    <pre>\n               C\n               \u2502\n      Vin \u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500 L \u2500\u2500\u2500\u2500\u2500 Vout\n               \u2502\n              GND\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>11. LC Filter\uc758 \ucc28\ub2e8\ud2b9\uc131<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub450 \uac1c\uc758 Reactive Element\ub97c \uc0ac\uc6a9\ud558\uba74\n      \ucc28\ub2e8\uc601\uc5ed\uc758 \uae30\uc6b8\uae30\ub294\n    <\/p>\n\n    <div class=\"formula\">\n      -40 dB\/dec\n    <\/div>\n\n    <p>\n      \ub85c \uae30\ub85d\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        1\ucc28 \ud544\ud130\ubcf4\ub2e4 \ucc28\ub2e8\uc601\uc5ed\uc5d0\uc11c\n        Gain\uc774 \ub354 \ube60\ub974\uac8c \uac10\uc18c\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>12. Damping Ratio<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      NeoStudio\uc758 2\ucc28 \ud544\ud130 \uc804\uac1c\uc5d0\uc11c\ub294\n      \ubd84\ubaa8\ub97c\n    <\/p>\n\n    <div class=\"formula\">\n      s\u00b2 + \u03b1s + \u03b2\n    <\/div>\n\n    <p>\n      \ud615\ud0dc\ub85c \uc815\ub9ac\ud558\uace0,\n      \uc774\ub97c 2\ucc28 \ud45c\uc900\ud615\uacfc \ube44\uad50\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      s\u00b2\n      +\n      2\u03b6\u03c9<sub>n<\/sub>s\n      +\n      \u03c9<sub>n<\/sub>\u00b2\n    <\/div>\n\n    <p>\n      \ud544\uae30\uc5d0\ub294\n      \uc774 \uacfc\uc815\uc5d0\uc11c Damping Ratio\ub97c\n      \uc870\uc808\ud574\uc57c \ud55c\ub2e4\ub294 \uba54\ubaa8\uac00 \uc788\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>13. 2\ucc28 Filter\uc758 Normalized Form<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc6d0\ubcf8\uc5d0\uc11c\ub294 2\ucc28 \uc804\ub2ec\ud568\uc218\ub97c\n      \ub2e4\uc74c\uacfc \uac19\uc740 \ud615\ud0dc\ub85c \uc815\uaddc\ud654\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      G(s)\n      =\n      K\n      \u00b7\n      (s\/\u03b1\u2082 + 1)\n      \/\n      (\n      s\u00b2\/\u03b1\u2083\n      +\n      \u03b1\u2081s\n      +\n      1\n      )\n    <\/div>\n\n    <div class=\"warning\">\n      <strong>\n        \u03b1\u2081, \u03b1\u2082, \u03b1\u2083\uc758 \uc138\ubd80 \uc815\uc758\ub294\n        \uc190\ud544\uae30\uc5d0\uc11c \uba85\ud655\ud558\uc9c0 \uc54a\uc544\n        \uc6d0\ubcf8 \uae30\ud638 \uad00\uacc4\ub9cc \ubcf4\uc874\ud558\uc600\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>14. 3\uac1c \uc18c\uc790\uc758 \ud544\ud130<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294\n      3\uac1c\uc758 Reactive Element\ub97c \uc774\uc6a9\ud55c\n      \ud544\ud130\ub97c T Type\uacfc \u03c0 Type\uc73c\ub85c \uad6c\ubd84\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      3\uac1c Reactive Element\n      \u2192\n      -60 dB\/dec\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>15. T Type Filter<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      T Type\uc740\n      \ub450 \uac1c\uc758 \uc9c1\ub82c Inductor \uc0ac\uc774\uc5d0\n      Capacitor\uac00 \uc811\uc9c0 \ubc29\ud5a5\uc73c\ub85c \uc5f0\uacb0\ub41c \ud615\ud0dc\uc774\ub2e4.\n    <\/p>\n\n    <pre>\n      Vin \u2500\u2500 L \u2500\u2500\u252c\u2500\u2500 L \u2500\u2500 Vout\n                 \u2502\n                 C\n                 \u2502\n                GND\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>16. \u03c0 Type Filter<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \u03c0 Type\uc740\n      \uc591\ucabd\uc5d0 Capacitor\uac00 \uc811\uc9c0\ub85c \uc5f0\uacb0\ub418\uace0,\n      \uac00\uc6b4\ub370 Inductor\uac00 \uc9c1\ub82c\ub85c \ubc30\uce58\ub41c \ud615\ud0dc\uc774\ub2e4.\n    <\/p>\n\n    <pre>\n             C             C\n             \u2502             \u2502\n      Vin \u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500 L \u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500 Vout\n             \u2502             \u2502\n            GND           GND\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>17. \ud544\ud130 \ucc28\uc218\uc640 \uac10\uc1e0 \uae30\uc6b8\uae30<\/h2>\n\n  <div class=\"table-wrap\">\n\n    <table>\n\n      <thead>\n        <tr>\n          <th>\ucc28\uc218<\/th>\n          <th>Reactive Element<\/th>\n          <th>\ucc28\ub2e8\uc601\uc5ed \uae30\uc6b8\uae30<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>1\ucc28<\/strong><\/td>\n          <td>1\uac1c<\/td>\n          <td>-20 dB\/dec<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>2\ucc28<\/strong><\/td>\n          <td>2\uac1c<\/td>\n          <td>-40 dB\/dec<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>3\ucc28<\/strong><\/td>\n          <td>3\uac1c<\/td>\n          <td>-60 dB\/dec<\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>18. \ud544\ud130 \ubc30\uce58\uc640 Impedance<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294\n      Filter \uc55e\ub2e8\uacfc \ub4b7\ub2e8\uc758 Impedance\uc5d0 \ub530\ub77c\n      L-C\ud615\uacfc C-L\ud615\uc744 \uc120\ud0dd\ud55c\ub2e4\uace0 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <p>\n      \uc77c\ubc18\uc801\uc778 \ubc30\uce58\ubc29\ud5a5\uc73c\ub85c\n    <\/p>\n\n    <ul>\n      <li>Inductor\uac00 \uc788\ub294 \ucabd : \ub0ae\uc740 Impedance \ubc29\ud5a5<\/li>\n      <li>Capacitor\uac00 \uc788\ub294 \ucabd : \ub192\uc740 Impedance \ubc29\ud5a5<\/li>\n    <\/ul>\n\n    <p>\n      \uc73c\ub85c \uc124\uba85\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>19. LPF\uc758 \uc804\uccb4 \uad00\uacc4<\/h2>\n\n  <div class=\"card\">\n\n    <pre>\n                      Low Pass Filter\n                             \u2502\n               \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n               \u25bc             \u25bc             \u25bc\n             1\ucc28            2\ucc28            3\ucc28\n               \u2502             \u2502             \u2502\n          L \ub610\ub294 C          LC\/CL          T\/\u03c0\n               \u2502             \u2502             \u2502\n               \u25bc             \u25bc             \u25bc\n         -20 dB\/dec     -40 dB\/dec     -60 dB\/dec\n               \u2502\n               \u25bc\n          1\ucc28 Pole\n               \u2502\n        \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n        \u25bc             \u25bc\n    RL \ud615\ud0dc        RC \ud615\ud0dc\n        \u2502             \u2502\n        \u25bc             \u25bc\n   R\/(sL+R)      1\/(RCs+1)\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>20. \uc774\ubbf8\uc9c0 \ud575\uc2ec \uc815\ub9ac<\/h2>\n\n  <div class=\"table-wrap\">\n\n    <table>\n\n      <thead>\n        <tr>\n          <th>\ud56d\ubaa9<\/th>\n          <th>\uc6d0\ubcf8 \ub0b4\uc6a9<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>LPF<\/strong><\/td>\n          <td>Low Pass Filter<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>1\ucc28<\/strong><\/td>\n          <td>-20 dB\/dec<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>Inductor LPF<\/strong><\/td>\n          <td>Vout\/Vin = R\/(sL+R)<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>Capacitor Impedance<\/strong><\/td>\n          <td>ZC = 1\/(sC)<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>RC LPF<\/strong><\/td>\n          <td>Vout\/Vin = 1\/(RCs+1)<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>2\ucc28<\/strong><\/td>\n          <td>LC\/CL, -40 dB\/dec<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>2\ucc28 \ud45c\uc900\ubd84\ubaa8<\/strong><\/td>\n          <td>s\u00b2 + 2\u03b6\u03c9n s + \u03c9n\u00b2<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>3\ucc28<\/strong><\/td>\n          <td>T\/\u03c0 Type, -60 dB\/dec<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ucc28\ub2e8\uc8fc\ud30c\uc218<\/strong><\/td>\n          <td>\uadf8\ub9bc\uc5d0\uc11c fc, \uc57d -3 dB \uc9c0\uc810\uc73c\ub85c \ud45c\uc2dc<\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"warning\">\n    <strong>\n      \uc774 HTML\uc740 WordPress \ud398\uc774\uc9c0 \ubcf8\ubb38\uacfc\n      \uc5f0\uacb0\ub41c Bode Plot \uac8c\uc2dc\uae00\uc744 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uace0,\n      \ud398\uc774\uc9c0\uc5d0 \ud3ec\ud568\ub41c \uc77c\ubc18 \uc774\ubbf8\uc9c0 3\uc7a5\ub9cc\n      \uc2dc\uac01 \ud310\ub3c5\ud558\uc5ec \uc791\uc131\ud588\ub2e4.\n\n      \uc774 \ud398\uc774\uc9c0\uc5d0\ub294 \ubcc4\ub3c4\uc758 NeoStudio PDF\uac00 \uc5c6\ub2e4.\n\n      \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\ub294\n      L \ub610\ub294 C \ud55c \uac1c\ub97c \uc0ac\uc6a9\ud558\ub294 1\ucc28 \ud544\ud130,\n      LC\/CL \ub450 \uc18c\uc790\ub97c \uc0ac\uc6a9\ud558\ub294 2\ucc28 \ud544\ud130,\n      T\/\u03c0 \uad6c\uc870\uc758 3\uc18c\uc790 \ud544\ud130\ub97c \ube44\uad50\ud558\uace0\n      \uac01\uac01 -20, -40, -60 dB\/dec\uc758\n      \ucc28\ub2e8 \uae30\uc6b8\uae30\ub97c \uae30\ub85d\ud55c\ub2e4.\n\n      \ub450 \ubc88\uc9f8 \uc774\ubbf8\uc9c0\ub294\n      1\ucc28 LPF\uc758 -20 dB\/dec\ub97c\n      Bode Plot \uad00\uacc4\ub85c \ud655\uc778\ud558\uace0,\n      L-R \ud68c\ub85c\uc640 C\ub97c \uc0ac\uc6a9\ud558\ub294 \ud68c\ub85c\uc758\n      \uc804\ub2ec\ud568\uc218\ub97c \uc804\uac1c\ud55c\ub2e4.\n\n      \uc138 \ubc88\uc9f8 \uc774\ubbf8\uc9c0\ub294\n      2\uac1c \uc18c\uc790\uc758 LC \ud544\ud130\ub97c\n      2\ucc28 \uc804\ub2ec\ud568\uc218\ub85c \uc804\uac1c\ud558\uace0\n      Damping Ratio\uc640 \uc815\uaddc\ud654 \ud615\ud0dc\ub97c \uae30\ub85d\ud558\uba70,\n      3\uac1c \uc18c\uc790\ub97c \uc0ac\uc6a9\ud558\uba74\n      -60 dB\/dec\uac00 \ub41c\ub2e4\ub294 \ub0b4\uc6a9\uc73c\ub85c \uc774\uc5b4\uc9c4\ub2e4.\n\n      Butterworth,\n      Chebyshev,\n      Bessel,\n      Active LPF,\n      OP Amp Filter \ub4f1\uc740\n      \uc774\ubc88 \uc774\ubbf8\uc9c0\uc5d0 \uc5c6\uc73c\ubbc0\ub85c \ucd94\uac00\ud558\uc9c0 \uc54a\uc558\ub2e4.\n\n      \ub450 \ubc88\uc9f8\uc640 \uc138 \ubc88\uc9f8 \uc774\ubbf8\uc9c0\uc758\n      \uc77c\ubd80 \u03b1, \u03b2, K \uacc4\uc218\ub294 \uc190\ud544\uae30\uac00 \ubd88\uba85\ud655\ud558\ubbc0\ub85c\n      \uc678\ubd80 \ud544\ud130\uc774\ub860\uc73c\ub85c \uc784\uc758 \ubcf4\uc815\ud558\uc9c0 \uc54a\uc558\ub2e4.\n    <\/strong>\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"keywords\">\n    LPF,\n    Low Pass Filter,\n    Bode Plot,\n    Cutoff Frequency,\n    Inductor Filter,\n    Capacitor Filter,\n    RL Filter,\n    RC Filter,\n    LC Filter,\n    CL Filter,\n    T Type Filter,\n    Pi Type Filter,\n    Damping Ratio,\n    -20 dB\/dec,\n    -40 dB\/dec,\n    -60 dB\/dec\n  <\/div>\n\n<\/div>\n&#8220;`\n","protected":false},"excerpt":{"rendered":"<p>SI, PI, EMI 90page &#8220;`html LPF \uc815\ub9ac Low Pass Filter \u00b7 Bode Plot \u00b7 -20 dB\/dec \u00b7 LC Filter \u00b7 T Type \u00b7 \u03c0 Type 1. \ud544\ud130\uc758 \uc885\ub958\ubcc4 \ud2b9\uc131 \uccab \ubc88\uc9f8 \uc774\ubbf8\uc9c0\ub294 \uc218\ub3d9\uc18c\uc790 L, C\ub97c \uc774\uc6a9\ud55c \ud544\ud130 \uad6c\uc870\uc640 \ucc28\ub2e8\uc601\uc5ed\uc758 \uae30\uc6b8\uae30\ub97c \ube44\uad50\ud55c\ub2e4. \ud544\ud130 \uad6c\uc131 \ud615\ud0dc \ucc28\ub2e8\uc601\uc5ed \uae30\uc6b8\uae30 1\uac1c \uc18c\uc790 L \ub610\ub294 C -20 dB\/dec 2\uac1c \uc18c\uc790 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1185],"tags":[1571,1808,1228],"class_list":["post-8160","post","type-post","status-publish","format-standard","hentry","category-1185","tag-bode-plot","tag-lowpassfilter","tag-lpf"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/8160","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/comments?post=8160"}],"version-history":[{"count":2,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/8160\/revisions"}],"predecessor-version":[{"id":9706,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/8160\/revisions\/9706"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=8160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=8160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=8160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}