{"id":6877,"date":"2024-03-16T17:29:29","date_gmt":"2024-03-16T08:29:29","guid":{"rendered":"https:\/\/now0930.pe.kr\/wordpress\/?p=6877"},"modified":"2026-10-04T10:06:18","modified_gmt":"2026-10-04T01:06:18","slug":"%ed%94%84%eb%a0%88%ec%9e%84-%ea%b7%b8%eb%9d%bc%ec%9a%b4%eb%93%9c","status":"publish","type":"post","link":"https:\/\/now0930.pe.kr\/wordpress\/%ed%94%84%eb%a0%88%ec%9e%84-%ea%b7%b8%eb%9d%bc%ec%9a%b4%eb%93%9c\/","title":{"rendered":"\ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\uc81c\uc5b4\uae30 \uc124\uacc4\uc5d0 \uc788\uc5b4 \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub97c \uc124\uba85\ud558\uace0, \uc804\uc790\uae30\ud30c \ucc28\ud3d0\ub97c \uc704\ud574 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud574\uc57c \ud558\ub294\uc9c0\ub97c \uc124\uba85\ud558\uc2dc\uc624<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-44.jpg\" alt=\"\" class=\"wp-image-6881\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-44.jpg 936w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-44-768x1050.jpg 768w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1280\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-16.jpg\" alt=\"\" class=\"wp-image-6882\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-16.jpg 936w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/\uc81c\ubaa9-\uc5c6\uc74c-1-16-768x1050.jpg 768w\" sizes=\"auto, (max-width: 936px) 100vw, 936px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"http:\/\/&quot;N:\\\uae30\uc220\uc0ac\uc900\ube44\\\uc7a1\ub2e4\ud55c\uc790\ub8cc\\2016-12\uc6d4\ud638(37\ud638)_ESD\ubcf4\ud638\uc124\uacc4\ub300\ucc45.pdf&quot;\">EMC Webzine, 2016, Dec, Vol 37, 36page<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"996\" height=\"1193\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-18.png\" alt=\"\" class=\"wp-image-6878\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-18.png 996w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-18-768x920.png 768w\" sizes=\"auto, (max-width: 996px) 100vw, 996px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"873\" height=\"1205\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-19.png\" alt=\"\" class=\"wp-image-6879\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-19.png 873w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-19-768x1060.png 768w\" sizes=\"auto, (max-width: 873px) 100vw, 873px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"780\" height=\"461\" src=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-20.png\" alt=\"\" class=\"wp-image-6880\" srcset=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-20.png 780w, https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/03\/image-20-768x454.png 768w\" sizes=\"auto, (max-width: 780px) 100vw, 780px\" \/><\/figure>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/05\/p104_technical_data_for_shielding_electromagnetic_wave.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"p104_technical_data_for_shielding_electromagnetic_wave\uc758 \uc0bd\uc785.\"><\/object><a id=\"wp-block-file--media-132cfb69-cda2-4ca4-b694-3bf9ae2a5d62\" href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/05\/p104_technical_data_for_shielding_electromagnetic_wave.pdf\">p104_technical_data_for_shielding_electromagnetic_wave<\/a><a href=\"https:\/\/now0930.pe.kr\/wordpress\/wp-content\/uploads\/2024\/05\/p104_technical_data_for_shielding_electromagnetic_wave.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-132cfb69-cda2-4ca4-b694-3bf9ae2a5d62\">\ub2e4\uc6b4\ub85c\ub4dc<\/a><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\uc81c\uc5b4\uae30 \uc124\uacc4\uc5d0\uc11c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc(frame ground)\ub294 \uc2dc\uc2a4\ud15c\uc758 \ubb3c\ub9ac\uc801 \uad6c\uc870\ub098 \uc0e4\uc2dc(chassis)\ub97c \uc9c0\uad6c\uc758 \uc804\uae30\uc801 &#8220;\uc811\uc9c0(ground)&#8221;\uc5d0 \uc5f0\uacb0\ud558\ub294 \uac83\uc744 \ub9d0\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc811\uc9c0 \ubc29\ubc95\uc740 \uc804\uc790 \uc7a5\ube44\uc5d0\uc11c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc804\uc790\uae30 \uac04\uc12d(EMI, Electromagnetic Interference) \ubc0f \uae30\ud0c0 \uc804\uae30\uc801 \uc7a1\uc74c\uc744 \uc904\uc774\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub294 \uc548\uc804\ud558\uace0 \uc548\uc815\uc801\uc778 \uc2dc\uc2a4\ud15c \uc6b4\uc601\uc744 \ubcf4\uc7a5\ud558\uae30 \uc704\ud574 \ud544\uc218\uc801\uc778 \uc694\uc18c \uc911 \ud558\ub098\uc785\ub2c8\ub2e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\uc758 \ubaa9\uc801<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\uc548\uc804\uc131 \ud5a5\uc0c1:<\/strong> \uc804\uae30\uc801 \uace0\uc7a5\uc774 \ubc1c\uc0dd\ud588\uc744 \ub54c, \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub294 \uacfc\ub3c4\ud55c \uc804\ub958\ub97c \uc9c0\uad6c\ub85c \uc548\uc804\ud558\uac8c \ubc30\ucd9c\ud558\uc5ec \uc0ac\uc6a9\uc790\uc640 \uc7a5\ube44\ub97c \ubcf4\ud638\ud569\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc804\uc790\uae30\ud30c \ucc28\ud3d0:<\/strong> \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub294 \uc678\ubd80 \uc804\uc790\uae30\ud30c\ub85c\ubd80\ud130 \uc7a5\ube44\ub97c \ubcf4\ud638\ud558\uace0, \uc7a5\ube44\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \uc804\uc790\uae30\ud30c\uac00 \uc678\ubd80\ub85c \uc720\ucd9c\ub418\ub294 \uac83\uc744 \ubc29\uc9c0\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\uc804\uc790\uae30\ud30c \ucc28\ud3d0\ub97c \uc704\ud55c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc \uc0ac\uc6a9 \ubc29\ubc95<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\uc811\uc9c0 \uc810\uc758 \ucd5c\uc801\ud654:<\/strong> \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub294 \uc801\uc808\ud55c \uc704\uce58\uc5d0 \uc811\uc9c0 \uc810\uc744 \uc124\uc815\ud558\uc5ec \uc804\uccb4 \uc2dc\uc2a4\ud15c\uc758 \uc811\uc9c0 \uacbd\ub85c\ub97c \ucd5c\uc801\ud654\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \uc811\uc9c0 \ub8e8\ud504(loop)\ub97c \ucd5c\uc18c\ud654\ud558\uace0, \uc7a1\uc74c \uc804\ub958\uc758 \uc601\ud5a5\uc744 \uc904\uc774\uae30 \uc704\ud568\uc785\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uc811\uc9c0 \uacbd\ub85c \ub2e8\uc21c\ud654:<\/strong> \uc811\uc9c0 \uacbd\ub85c\ub294 \uac00\ub2a5\ud55c \uc9c1\uc120\uc774 \ub418\ub3c4\ub85d \uc124\uacc4\ud574\uc57c \ud558\uba70, \uacbd\ub85c\uc758 \uae38\uc774\ub97c \ucd5c\uc18c\ud654\ud558\uc5ec \uc784\ud53c\ub358\uc2a4\ub97c \uc904\uc5ec\uc57c \ud569\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uace0\uc8fc\ud30c \uc7a1\uc74c\uc758 \uc811\uc9c0 \uacbd\ub85c\uc5d0 \ub300\ud55c \uc601\ud5a5\uc744 \uac10\uc18c\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ucf00\uc774\ube14 \ubc0f \ucee4\ub125\ud130\uc758 \uc801\uc808\ud55c \uc120\ud0dd:<\/strong> \uc804\uc790\uae30\ud30c \ucc28\ud3d0\ub97c \uc704\ud574, \uc274\ub4dc(shield)\uac00 \uc788\ub294 \ucf00\uc774\ube14\uc744 \uc0ac\uc6a9\ud558\uace0, \uc774 \ucf00\uc774\ube14\uc758 \uc274\ub4dc\ub97c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\uc5d0 \uc5f0\uacb0\ud574\uc57c \ud569\ub2c8\ub2e4. \ucf00\uc774\ube14\uc758 \uc274\ub4dc\ub294 \uc678\ubd80 \uc7a1\uc74c\uc744 \ucc28\ub2e8\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\uba54\ud0c8 \uc0e4\uc2dc\uc758 \ud65c\uc6a9:<\/strong> \uc81c\uc5b4\uae30 \ubc0f \uc804\uc790 \uc7a5\ube44\uc758 \uc0e4\uc2dc\ub97c \uba54\ud0c8 \uc7ac\uc9c8\ub85c \uc120\ud0dd\ud558\uace0, \uc774\ub97c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\uc5d0 \uc811\uc9c0\uc2dc\ud0a4\uba74 \uc678\ubd80 \uc804\uc790\uae30\ud30c\uc758 \uce68\uc785\uc744 \ub9c9\uace0, \uc7a5\ube44 \ub0b4\ubd80\uc5d0\uc11c \ubc1c\uc0dd\ud558\ub294 \uc804\uc790\uae30\ud30c\uc758 \uc720\ucd9c\uc744 \ucc28\ub2e8\ud558\ub294 \ud6a8\uacfc\uc801\uc778 \ucc28\ud3d0\uac00 \ub429\ub2c8\ub2e4.<\/li>\n\n\n\n<li><strong>\ub2e4\uc911 \uc811\uc9c0 \ud3ec\uc778\ud2b8 \ubc29\uc9c0:<\/strong> \uc81c\uc5b4 \uc2dc\uc2a4\ud15c \ub0b4\uc5d0\uc11c \ub2e4\uc911 \uc811\uc9c0 \ud3ec\uc778\ud2b8(ground loop)\ub97c \ub9cc\ub4e4\uc9c0 \uc54a\ub3c4\ub85d \uc8fc\uc758\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \uc804\uc790\uae30 \uc7a1\uc74c\uc744 \uc720\ubc1c\ud560 \uc218 \uc788\uc73c\uba70, \uc2dc\uc2a4\ud15c \ub0b4\uc5d0\uc11c \ubd88\ud544\uc694\ud55c \uc804\ub958 \ud750\ub984\uc744 \uc0dd\uc131\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\uc81c\uc5b4\uae30 \uc124\uacc4\uc5d0\uc11c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\uc640 \uc804\uc790\uae30\ud30c \ucc28\ud3d0\ub97c \uc62c\ubc14\ub974\uac8c \uc801\uc6a9\ud558\ub294 \uac83\uc740 \uc2dc\uc2a4\ud15c\uc758 \uc2e0\ub8b0\uc131\uacfc \uc131\ub2a5\uc744 \ubcf4\uc7a5\ud558\ub294 \ub370 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \uc811\uc9c0 \uc124\uacc4\uc5d0 \ub300\ud55c \uae4a\uc740 \uc774\ud574\uc640 \uc8fc\uc758 \uae4a\uc740 \uacc4\ud68d\uc774 \ud544\uc694\ud558\uba70, \uc774\ub97c \ud1b5\ud574 \uc804\uc790 \uc7a5\ube44\uc758 \uc548\uc804\uc131\uacfc \uc815\ud655\uc131\uc744 \ud06c\uac8c \ud5a5\uc0c1\uc2dc\ud0ac \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n\n\n\n&#8220;`html\n<div class=\"chapter19-wide\">\n\n  <h1>\ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc<\/h1>\n\n  <div class=\"subtitle\">\n    Frame Ground \u00b7 Signal Ground \u00b7 EMI \u00b7 ESD \u00b7 Common Mode \u00b7 Differential Mode \u00b7 Shielding\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>1. FG \u00b7 SG<\/h2>\n\n  <div class=\"card\">\n\n    <div class=\"formula\">\n      FG = Frame Ground\n    <\/div>\n\n    <div class=\"formula\">\n      SG = Signal Ground\n    <\/div>\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \uc81c\uc5b4\uae30 \uc124\uacc4 \uc2dc\n      \uc0e4\uc2dc \ubcf4\ud638\uc640 Noise \uc804\ub958 \ucc98\ub9ac\uc5d0\n      Frame Ground\ub97c \uc0ac\uc6a9\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"memory\">\n      <strong>\n        FG\ub294 \uc0e4\uc2dc\u00b7\ud504\ub808\uc784 \uce21 \uc811\uc9c0,\n        SG\ub294 \uc2e0\ud638\ud68c\ub85c\uc758 \uae30\uc900 Ground\ub85c \uad6c\ubd84\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>2. Frame Ground\uc758 \ubaa9\uc801<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 Frame Ground\uc758 \uc5ed\ud560\uc744\n      \ub2e4\uc74c\uacfc \uac19\uc774 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <ol>\n      <li>\uc81c\uc5b4\uae30 \uace0\uc7a5 \uc2dc \uc0e4\uc2dc \ubcf4\ud638<\/li>\n      <li>\uc678\ubd80 Noise\uc5d0 \ub300\ud55c \ubcf4\ud638<\/li>\n      <li>\uc804\uc790\uae30\uae30 \ubcf4\ud638<\/li>\n    <\/ol>\n\n    <pre>\n      External EMI \/ ESD\n             \u2502\n             \u25bc\n        Metal Frame\n             \u2502\n             \u25bc\n         Frame Ground\n             \u2502\n             \u25bc\n           Ground\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>3. \ub300\uaddc\ubaa8 \uc124\ube44\uc5d0\uc11c FG \uc0ac\uc6a9<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub300\uaddc\ubaa8 \uc124\ube44\uc5d0\uc11c\ub294\n      \ub300\uc9c0\uc811\uc9c0\uc640 FG\ub97c \uc774\uc6a9\ud558\uc5ec\n      \uc7a5\ube44\uc758 \ubcf4\ud638\uad6c\uc870\ub97c \uad6c\uc131\ud55c\ub2e4\uace0 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <ul>\n      <li>\uae30\uae30 \ubcf4\ud638<\/li>\n      <li>\uc804\uc790\uae30\uae30 \uc678\ud568 \uc811\uc9c0<\/li>\n      <li>\uc678\ubd80 Noise \uc804\ub958 \uc6b0\ud68c<\/li>\n    <\/ul>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>4. EMI \uc720\uc785 \uacbd\ub85c<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \uc678\ubd80\uc5d0\uc11c \uc720\uc785\ub41c EMI \ub610\ub294 ESD \uc804\ub958\uac00\n      \uc2e0\ud638 Ground\ub97c \ud1b5\ud574 \ud68c\ub85c \uc548\uc73c\ub85c \uc720\uc785\ub418\uba74\n      \uc624\ub3d9\uc791\uc774\ub098 Noise \ubb38\uc81c\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\ub2e4.\n    <\/p>\n\n    <pre>\n      External EMI\n          \u2502\n          \u25bc\n      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n      \u2502 Metal Frame   \u2502\n      \u2502   \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510   \u2502\n      \u2502   \u2502  PCB  \u2502   \u2502\n      \u2502   \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518   \u2502\n      \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n             \u2502\n             \u25bc\n           Ground\n    <\/pre>\n\n    <div class=\"memory\">\n      <strong>\n        \uc678\ubd80\uc5d0\uc11c \uc720\uc785\ub41c Noise \uc804\ub958\uac00\n        \ub0b4\ubd80 Signal Ground\ub97c \uc9c0\ub098\uc9c0 \uc54a\uace0\n        Frame\uc744 \ud1b5\ud574 Ground\ub85c \ube60\uc9c0\ub3c4\ub85d \uc124\uacc4\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>5. ESD \ub300\ucc45 \u2014 Frame\uc744 Ground\uc5d0 \uc5f0\uacb0<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ucc38\uace0 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 ESD \ub300\ucc45\uc758 \uccab \ubc88\uc9f8 \ubc29\ubc95\uc73c\ub85c\n      Frame\uc744 Ground\uc5d0 \uc9c1\uc811 \uc5f0\uacb0\ud558\uc5ec\n      Discharge Current\ub97c Ground\ub85c \ud758\ub9ac\ub294 \ubc29\ubc95\uc744 \uc124\uba85\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n       ESD\n        \u2502\n        \u25bc\n      [ Frame ]\n          \u2502\n          \u25bc\n        Ground\n    <\/pre>\n\n    <div class=\"formula\">\n      ESD Current\n      \u2192\n      Frame\n      \u2192\n      Ground\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        ESD \uc804\ub958\uac00 PCB \uc2e0\ud638\ud68c\ub85c\ub97c \ud1b5\uacfc\ud558\uc9c0 \uc54a\uace0\n        Frame\uc744 \ud1b5\ud574 Ground\ub85c \ube60\uc838\ub098\uac00\uac8c \ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>6. Ground Lead\uc758 Inductance<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ucc38\uace0 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 Frame\uacfc Ground \uc0ac\uc774\uc758\n      \ubc30\uc120\ub3c4 \uace0\uc8fc\ud30c\uc5d0\uc11c\ub294 Inductance\ub97c \uac00\uc9c4\ub2e4\uace0 \uc124\uba85\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Ground Lead\n      \u2192\n      Parasitic Inductance\n    <\/div>\n\n    <p>\n      \ub530\ub77c\uc11c Ground \uacbd\ub85c\uac00 \uae38\uac70\ub098 \ubcf5\uc7a1\ud558\uba74\n      \uace0\uc8fc\ud30c ESD\/EMI \uc804\ub958\uac00 \uc6d0\ud558\ub294 \uacbd\ub85c\ub85c \ube60\uc9c0\uae30 \uc5b4\ub824\uc6b8 \uc218 \uc788\ub2e4.\n    <\/p>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>7. Common Mode Choke<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      Frame\uacfc PCB Ground\uac00 \uc5f0\uacb0\ub41c \uad6c\uc870\uc5d0\uc11c\ub294\n      ESD\uc5d0 \uc758\ud55c Common Mode Current\uac00\n      \uc678\ubd80 \ud68c\ub85c\ub85c \ud750\ub97c \uc218 \uc788\ub2e4.\n    <\/p>\n\n    <p>\n      \uc774\ub97c \uc904\uc774\uae30 \uc704\ud574\n      Common Mode Choke\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4\uace0 \uae30\ub85d\ub418\uc5b4 \uc788\ub2e4.\n    <\/p>\n\n    <pre>\n      PCB \u2500\u2500\u2500\u2500\u2500\u2500[ CM Choke ]\u2500\u2500\u2500\u2500\u2500\u2500 External Circuit\n                       \u2502\n                       \u25bc\n                Common Mode \uc5b5\uc81c\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>8. Differential Mode ESD \ub300\ucc45<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc640 \ucc38\uace0 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294\n      Differential Mode ESD Current\ub97c \uc904\uc774\uae30 \uc704\ud574\n      Line-to-Line Capacitor\ub97c \uc0ac\uc6a9\ud558\ub294 \ubc29\ubc95\uc744 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      DM ESD Current\n      \u2192\n      Line-to-Line Capacitor\n    <\/div>\n\n    <pre>\n      Line 1 \u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n                  \u2502\n                 \u2500\u2500\u2500 C\n                 \u2500\u2500\u2500\n                  \u2502\n      Line 2 \u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>9. Common Mode ESD \ub300\ucc45<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      Common Mode ESD Current \ub300\ucc45\uc73c\ub85c\ub294\n      Line-to-Ground Capacitor\ub97c \uc0ac\uc6a9\ud55c\ub2e4\uace0 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      CM ESD Current\n      \u2192\n      Line-to-Ground Capacitor\n    <\/div>\n\n    <pre>\n      Signal Line \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\n                          \u2502\n                         \u2500\u2500\u2500 C\n                         \u2500\u2500\u2500\n                          \u2502\n                        Ground\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>10. DM \u00b7 CM \ub300\ucc45 \ube44\uad50<\/h2>\n\n  <div class=\"table-wrap\">\n\n    <table>\n\n      <thead>\n        <tr>\n          <th>\uad6c\ubd84<\/th>\n          <th>\ud544\uae30 \ub300\ucc45<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>Differential Mode<\/strong><\/td>\n          <td>Line-to-Line Capacitor<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>Common Mode<\/strong><\/td>\n          <td>Line-to-Ground Capacitor<\/td>\n        <\/tr>\n\n      <\/tbody>\n\n    <\/table>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>11. Clamping Device<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ucc38\uace0 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 ESD\ub098 \uacfc\ub3c4\uc804\uc555\uc744 \uc81c\ud55c\ud558\uae30 \uc704\ud574\n      \ub2e4\uc74c Clamping Device\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4\uace0 \uc124\uba85\ud55c\ub2e4.\n    <\/p>\n\n    <ul>\n      <li>Zener Diode<\/li>\n      <li>Varistor<\/li>\n      <li>Transient Suppressor<\/li>\n    <\/ul>\n\n    <div class=\"formula\">\n      Input Voltage\n      &gt;\n      Threshold\n      \u2192\n      Clamping\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>12. Cable Connector\uc640 Frame<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ucc38\uace0 \uc774\ubbf8\uc9c0\uc5d0\uc11c\ub294 Cable Connector\ub97c\n      PCB\uc758 \ud55c \uc9c0\uc810\uc5d0 \ub2e8\uc21c \uc5f0\uacb0\ud558\ub294 \uacbd\uc6b0\n      \ubd88\ud544\uc694\ud55c Current Path\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc74c\uc744 \ubcf4\uc5ec\uc900\ub2e4.\n    <\/p>\n\n    <p>\n      Connector\uc640 Frame \uc0ac\uc774\uc758\n      Current \ud750\ub984\uc744 \uace0\ub824\ud574\uc57c \ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n      Cable\n        \u2502\n        \u25bc\n      Connector\n        \u2502\n        \u251c\u2500\u2500\u2500\u2500\u25ba PCB\n        \u2502\n        \u2514\u2500\u2500\u2500\u2500\u25ba Frame\n                 \u2502\n                 \u25bc\n               Ground\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>13. \uc5ec\ub7ec Board\uc758 Ground \ubb38\uc81c<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ucc38\uace0 \uc774\ubbf8\uc9c0\uc758 \uacb0\ub860\uc5d0\uc11c\ub294\n      \uc5ec\ub7ec Board\uac00 Cable\ub85c \uc5f0\uacb0\ub41c \uc81c\ud488\uc5d0\uc11c\n      Ground \uc804\uc704\ucc28\uac00 Noise\uc758 \uc8fc\uc694 \uc6d0\uc778\uc774 \ub420 \uc218 \uc788\ub2e4\uace0 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n      Board A\n        \u2502\n      Cable\n        \u2502\n      Board B\n        \u2502\n      Cable\n        \u2502\n      Board C\n\n      Ground Potential Difference\n              \u2193\n            Noise\n    <\/pre>\n\n    <div class=\"memory\">\n      <strong>\n        \uc5ec\ub7ec Board \uc0ac\uc774\uc758 Ground\ub97c \uc5b4\ub5bb\uac8c \uc5f0\uacb0\ud560 \uac83\uc778\uc9c0\uac00\n        EMC \uc124\uacc4\uc5d0\uc11c \uc911\uc694\ud558\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>14. \uc811\uc9c0\uc810 \ucd5c\uc18c\ud654<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ub450 \ubc88\uc9f8 \ud544\uae30\uc5d0\uc11c\ub294\n      \uc801\uc808\ud55c \uc704\uce58\uc5d0 \uc811\uc9c0\uc810\uc744 \uc120\uc815\ud558\uc5ec\n      Ground Loop\uac00 \uc0dd\uae30\uc9c0 \uc54a\ub3c4\ub85d \ud558\ub294 \ubc29\ud5a5\uc744 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Ground Loop \u2193\n      \u2192\n      Noise Current \u2193\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>15. \uc811\uc9c0 \uacbd\ub85c \ucd5c\uc18c\ud654<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      EMI\uc640 Ground \uc0ac\uc774\uc758 \uac70\ub9ac\uac00 \uae38\uc5b4\uc9c0\uba74\n      \uc811\uc9c0\uacbd\ub85c\uc758 \uc601\ud5a5\uc774 \ucee4\uc9c8 \uc218 \uc788\uc73c\ubbc0\ub85c\n      Ground \uacbd\ub85c\ub97c \uc9e7\uac8c \uad6c\uc131\ud55c\ub2e4.\n    <\/p>\n\n    <div class=\"formula\">\n      Ground Path Length \u2193\n      \u2192\n      Impedance \u2193\n    <\/div>\n\n    <div class=\"memory\">\n      <strong>\n        \uc811\uc9c0\uc120\uc740 \uac00\ub2a5\ud55c \uc9e7\uace0 \uc9c1\uc811\uc801\uc778 \uacbd\ub85c\ub85c \uad6c\uc131\ud55c\ub2e4.\n      <\/strong>\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>16. \uae08\uc18d\uc131 \uc0e4\uc2dc \uc0ac\uc6a9<\/h2>\n\n  <div class=\"card\">\n\n    <p>\n      \ud544\uae30\uc5d0\uc11c\ub294 \uae08\uc18d\uc131 \uc0e4\uc2dc\ub97c \uc0ac\uc6a9\ud558\uc5ec\n      \uc804\uc790\uae30\ud30c \ucc28\ud3d0 \uc131\ub2a5\uc744 \ud655\ubcf4\ud558\ub294 \ubc29\ubc95\uc744 \uae30\ub85d\ud55c\ub2e4.\n    <\/p>\n\n    <pre>\n        External EMI\n             \u2193\u2193\u2193\n\n      \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n      \u2502   Metal Chassis \u2502\n      \u2502                 \u2502\n      \u2502   Controller    \u2502\n      \u2502                 \u2502\n      \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n               \u2502\n               \u25bc\n           Frame Ground\n    <\/pre>\n\n    <div class=\"formula\">\n      Metal Chassis\n      +\n      Frame Ground\n      \u2192\n      EMI Shielding\n    <\/div>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>17. Frame Ground \uc124\uacc4 \ud750\ub984<\/h2>\n\n  <div class=\"card\">\n\n    <pre>\n      External EMI \/ ESD\n              \u2502\n              \u25bc\n         Metal Chassis\n              \u2502\n              \u25bc\n         Frame Ground\n              \u2502\n              \u25bc\n            Ground\n\n      Signal Circuit\n              \u2502\n              \u251c\u2500\u2500 DM \u2192 Line-to-Line C\n              \u2502\n              \u251c\u2500\u2500 CM \u2192 Line-to-Ground C\n              \u2502\n              \u251c\u2500\u2500 CM Choke\n              \u2502\n              \u2514\u2500\u2500 Clamping Device\n    <\/pre>\n\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <h2>18. \uc774\ubbf8\uc9c0 OCR \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>\uc774\ubbf8\uc9c0 \ub0b4\uc6a9<\/th>\n        <\/tr>\n      <\/thead>\n\n      <tbody>\n\n        <tr>\n          <td><strong>FG<\/strong><\/td>\n          <td>Frame Ground \/ \uc0e4\uc2dc \uc811\uc9c0<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>SG<\/strong><\/td>\n          <td>Signal Ground<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>FG \ubaa9\uc801<\/strong><\/td>\n          <td>\uae30\uae30 \ubcf4\ud638, EMI\/ESD \uc804\ub958 \uc6b0\ud68c<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>ESD \uacbd\ub85c<\/strong><\/td>\n          <td>Frame \u2192 Ground<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>DM \ub300\ucc45<\/strong><\/td>\n          <td>Line-to-Line Capacitor<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>CM \ub300\ucc45<\/strong><\/td>\n          <td>Line-to-Ground Capacitor, CM Choke<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uacfc\ub3c4\uc804\uc555<\/strong><\/td>\n          <td>Zener, Varistor, Transient Suppressor<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\uc811\uc9c0 \uc124\uacc4<\/strong><\/td>\n          <td>Ground Loop \uc5b5\uc81c, \uc9e7\uc740 \uc811\uc9c0\uacbd\ub85c<\/td>\n        <\/tr>\n\n        <tr>\n          <td><strong>\ucc28\ud3d0<\/strong><\/td>\n          <td>Metal Chassis + Frame Ground<\/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 \ud398\uc774\uc9c0 \ubcf8\ubb38\uc744 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\uace0,\n      \uc77c\ubc18 \ud544\uae30 \uc774\ubbf8\uc9c0 2\uc7a5\uacfc \ud398\uc774\uc9c0\uc5d0 \uc0bd\uc785\ub41c\n      EMC\/ESD \ucc38\uace0 \uc774\ubbf8\uc9c0 3\uc7a5\ub9cc OCR\/\uc2dc\uac01 \ud310\ub3c5\ud558\uc5ec \uc791\uc131\ud588\ub2e4.\n\n      \uc774 \ud398\uc774\uc9c0\uc5d0\ub294 NeoStudio PDF\uac00 \uc5c6\ub2e4.\n\n      \ucca8\ubd80\ub41c p104_technical_data_for_shielding_electromagnetic_wave \uc790\ub8cc\ub294\n      NeoStudio PDF\uac00 \uc544\ub2c8\ubbc0\ub85c \ud604\uc7ac \ubcc0\ud658 \uae30\uc900\uc5d0 \ub530\ub77c \uc81c\uc678\ud588\ub2e4.\n\n      \uc774\ubbf8\uc9c0\uc5d0 \uc5c6\ub294 Frame Ground \uc774\ub860\uc774\ub098 \uc811\uc9c0 \uaddc\uaca9\uc740\n      \uc77c\ubc18 \uc9c0\uc2dd\uc73c\ub85c \uc784\uc758 \ubcf4\uc644\ud558\uc9c0 \uc54a\uc558\ub2e4.\n    <\/strong>\n  <\/div>\n\n\n  <!-- ================================================= -->\n  <div class=\"keywords\">\n    Frame Ground,\n    FG,\n    Signal Ground,\n    SG,\n    Chassis Ground,\n    EMI,\n    ESD,\n    EMC,\n    Shielding,\n    Ground Loop,\n    Common Mode,\n    Differential Mode,\n    Common Mode Choke,\n    Line-to-Line Capacitor,\n    Line-to-Ground Capacitor,\n    Zener Diode,\n    Varistor,\n    Metal Chassis\n  <\/div>\n\n<\/div>\n&#8220;`\n","protected":false},"excerpt":{"rendered":"<p>\uc81c\uc5b4\uae30 \uc124\uacc4\uc5d0 \uc788\uc5b4 \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc\ub97c \uc124\uba85\ud558\uace0, \uc804\uc790\uae30\ud30c \ucc28\ud3d0\ub97c \uc704\ud574 \uc5b4\ub5bb\uac8c \uc0ac\uc6a9\ud574\uc57c \ud558\ub294\uc9c0\ub97c \uc124\uba85\ud558\uc2dc\uc624 EMC Webzine, 2016, Dec, Vol 37, 36page \uc81c\uc5b4\uae30 \uc124\uacc4\uc5d0\uc11c \ud504\ub808\uc784 \uadf8\ub77c\uc6b4\ub4dc(frame ground)\ub294 \uc2dc\uc2a4\ud15c\uc758 \ubb3c\ub9ac\uc801 \uad6c\uc870\ub098 \uc0e4\uc2dc(chassis)\ub97c \uc9c0\uad6c\uc758 \uc804\uae30\uc801 &#8220;\uc811\uc9c0(ground)&#8221;\uc5d0 \uc5f0\uacb0\ud558\ub294 \uac83\uc744 \ub9d0\ud569\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc811\uc9c0 \ubc29\ubc95\uc740 \uc804\uc790 \uc7a5\ube44\uc5d0\uc11c \ubc1c\uc0dd\ud560 \uc218 \uc788\ub294 \uc804\uc790\uae30 \uac04\uc12d(EMI, Electromagnetic Interference) \ubc0f \uae30\ud0c0 \uc804\uae30\uc801 \uc7a1\uc74c\uc744 \uc904\uc774\ub294 \ub370 \uc911\uc694\ud55c \uc5ed\ud560\uc744 [&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":[1505,1506,1508,1507,1509],"class_list":["post-6877","post","type-post","status-publish","format-standard","hentry","category-1185","tag-emi","tag-esd","tag-fg","tag-1507","tag-1509"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6877","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=6877"}],"version-history":[{"count":3,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6877\/revisions"}],"predecessor-version":[{"id":9610,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/posts\/6877\/revisions\/9610"}],"wp:attachment":[{"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/media?parent=6877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/categories?post=6877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/now0930.pe.kr\/wordpress\/wp-json\/wp\/v2\/tags?post=6877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}