{"id":1927,"date":"2024-07-02T12:41:52","date_gmt":"2024-07-02T12:41:52","guid":{"rendered":"https:\/\/tryvary.com\/?p=1927"},"modified":"2024-07-02T12:41:52","modified_gmt":"2024-07-02T12:41:52","slug":"pcb-layout-design-best-practices-for-emi-reduction","status":"publish","type":"post","link":"https:\/\/tryvary.com\/vi\/thuc-hanh-tot-nhat-ve-thiet-ke-bo-tri-pcb-de-giam-emi\/","title":{"rendered":"3 m\u1eb9o thi\u1ebft k\u1ebf c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3m EMI"},"content":{"rendered":"<p>\u0110\u1ec3 gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) trong thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch in (PCB), c\u1ea7n xem x\u00e9t ba m\u1eb9o thi\u1ebft k\u1ebf thi\u1ebft y\u1ebfu. \u0110\u1ea7u ti\u00ean, t\u1ed1i \u01b0u h\u00f3a <strong>X\u1ebfp ch\u1ed3ng l\u1edbp PCB<\/strong> \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ph\u00e1t th\u1ea3i EMI, \u0111\u1ea3m b\u1ea3o <strong>che ch\u1eafn hi\u1ec7u qu\u1ea3<\/strong> v\u00e0 tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n. Th\u1ee9 hai, gi\u1ea3m thi\u1ec3u b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <strong>k\u1ef9 thu\u1eadt b\u00e1o hi\u1ec7u vi sai<\/strong>&#44; <strong>n\u1ed1i \u0111\u1ea5t th\u00edch h\u1ee3p<\/strong>v\u00e0 v\u1eadt li\u1ec7u che ch\u1eafn. Cu\u1ed1i c\u00f9ng, \u0111\u1ecbnh tuy\u1ebfn ngu\u1ed3n \u0111i\u1ec7n v\u00e0 m\u1eb7t \u0111\u1ea5t m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, t\u00e1ch bi\u1ec7t c\u00e1c d\u1ea5u v\u1ebft \u0111i\u1ec7n v\u00e0 m\u1eb7t \u0111\u1ea5t trong khi v\u1eabn b\u1ea3o to\u00e0n <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> v\u00e0 gi\u1ea3m nhi\u1ec5u. B\u1eb1ng c\u00e1ch hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a nh\u1eefng c\u00e2n nh\u1eafc thi\u1ebft k\u1ebf n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u EMI m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t PCB \u0111\u00e1ng tin c\u1eady, kh\u00e1m ph\u00e1 c\u00e1c s\u1eafc th\u00e1i c\u1ee7a chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m EMI.<\/p>\n<h2>B\u00e0i h\u1ecdc ch\u00ednh<\/h2>\n<ul>\n<li>T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c x\u1ebfp ch\u1ed3ng l\u1edbp PCB \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ph\u00e1t th\u1ea3i EMI b\u1eb1ng c\u00e1ch \u0111\u1eb7t c\u00e1c l\u1edbp t\u00edn hi\u1ec7u li\u1ec1n k\u1ec1 v\u1edbi m\u1eb7t ph\u1eb3ng m\u1eb7t \u0111\u1ea5t v\u00e0 c\u00e2n b\u1eb1ng \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u v\u00e0 \u0111\u01b0\u1eddng ph\u1ea3n h\u1ed3i.<\/li>\n<li>S\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt truy\u1ec1n t\u00edn hi\u1ec7u vi sai v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u1ed1i \u0111\u1ea5t th\u00edch h\u1ee3p, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t r\u1eafn, \u0111\u1ec3 gi\u1ea3m nhi\u1ec5u v\u00e0 b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u \u1edf ch\u1ebf \u0111\u1ed9 chung.<\/li>\n<li>\u0110\u1ecbnh tuy\u1ebfn hi\u1ec7u qu\u1ea3 c\u00e1c t\u00edn hi\u1ec7u ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t b\u1eb1ng c\u00e1ch t\u00e1ch c\u00e1c d\u1ea5u v\u1ebft ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t, t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng d\u1eabn c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p v\u00e0 gi\u1ea3m thi\u1ec3u s\u1ee5t \u00e1p.<\/li>\n<li>S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u che ch\u1eafn v\u00e0 b\u1ed9 l\u1ecdc EMI \u0111\u1ec3 ch\u1ee9a v\u00e0 tri\u1ec7t ti\u00eau t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb, ng\u0103n ch\u1eb7n b\u1ee9c x\u1ea1 v\u00e0 nhi\u1ec5u.<\/li>\n<li>Th\u1ef1c hi\u1ec7n c\u00e1c chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u \u0111\u1ec3 gi\u1ea3m thi\u1ec3u di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p v\u00e0 gi\u1ea3m b\u1ee9c x\u1ea1, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed1 tr\u00ed c\u00e1c k\u1ebft n\u1ed1i ngu\u1ed3n v\u00e0 n\u1ed1i \u0111\u1ea5t m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn.<\/li>\n<\/ul>\n<h2>T\u1ed1i \u01b0u h\u00f3a vi\u1ec7c x\u1ebfp ch\u1ed3ng l\u1edbp PCB<\/h2>\n<div class=\"embed-youtube\" style=\"position: relative; width: 100%; height: 0; padding-bottom: 56.25%; margin-bottom:20px;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/QAOEtfvCaMw\" title=\"Tr\u00ecnh ph\u00e1t video YouTube\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div>\n<p>PCB \u0111\u01b0\u1ee3c l\u00ean k\u1ebf ho\u1ea1ch t\u1ed1t <strong>x\u1ebfp ch\u1ed3ng l\u1edbp<\/strong> l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ph\u00e1t th\u1ea3i nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), v\u00ec n\u00f3 cho ph\u00e9p che ch\u1eafn hi\u1ec7u qu\u1ea3, <strong>tr\u1edf kh\u00e1ng \u0111i\u1ec1u khi\u1ec3n<\/strong>, v\u00e0 hi\u1ec7u qu\u1ea3 <strong>\u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u<\/strong>.<\/p>\n<p>Trong PCB hi\u1ec7u su\u1ea5t cao, vi\u1ec7c x\u1ebfp ch\u1ed3ng l\u1edbp \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m EMI. \u0110i\u1ec1u n\u00e0y \u0111\u1ea1t \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch \u0111\u1eb7t c\u00e1c l\u1edbp t\u00edn hi\u1ec7u li\u1ec1n k\u1ec1 v\u1edbi m\u1eb7t ph\u1eb3ng m\u1eb7t \u0111\u1ea5t, gi\u00fap che ch\u1eafn hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m thi\u1ec3u ph\u00e1t th\u1ea3i EMI.<\/p>\n<p>Ngo\u00e0i ra, vi\u1ec7c \u0111\u1eb7t c\u00e1c m\u1eb7t ph\u1eb3ng ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t g\u1ea7n nhau trong l\u1edbp x\u1ebfp ch\u1ed3ng l\u00ean nhau s\u1ebd l\u00e0m gi\u1ea3m <strong>khu v\u1ef1c v\u00f2ng l\u1eb7p<\/strong>, gi\u1ea3m thi\u1ec3u h\u01a1n n\u1eefa l\u01b0\u1ee3ng ph\u00e1t th\u1ea3i EMI. M\u1ed9t s\u1ef1 s\u1eafp x\u1ebfp c\u00e2n b\u1eb1ng c\u00f3 t\u00ednh \u0111\u1ebfn c\u00e1c \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u v\u00e0 <strong>\u0111\u01b0\u1eddng d\u1eabn tr\u1edf l\u1ea1i<\/strong> c\u0169ng r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c gi\u1ea3m c\u00e1c v\u1ea5n \u0111\u1ec1 EMI.<\/p>\n<p>B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c x\u1ebfp ch\u1ed3ng l\u1edbp PCB, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u hi\u1ec7u qu\u1ea3 v\u00e0 gi\u1ea3m thi\u1ec3u nhi\u1ec5u EMI. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong PCB hi\u1ec7u su\u1ea5t cao, n\u01a1i <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> l\u00e0 t\u1ed1i quan tr\u1ecdng.<\/p>\n<h2>Gi\u1ea3m thi\u1ec3u b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/reduce_electromagnetic_field_exposure.jpg\" alt=\"gi\u1ea3m ti\u1ebfp x\u00fac v\u1edbi tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <strong>k\u1ef9 thu\u1eadt b\u00e1o hi\u1ec7u vi sai<\/strong>&#44; <strong>t\u00edn hi\u1ec7u n\u1ed1i \u0111\u1ea5t \u0111\u00fang c\u00e1ch<\/strong>, v\u00e0 s\u1eed d\u1ee5ng <strong>v\u1eadt li\u1ec7u che ch\u1eafn<\/strong>, nh\u00e0 thi\u1ebft k\u1ebf PCB c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u <strong>b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u<\/strong>, do \u0111\u00f3 l\u00e0m gi\u1ea3m <strong>ph\u00e1t th\u1ea3i EMI<\/strong> v\u00e0 \u0111\u1ea3m b\u1ea3o <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> TRONG <strong>\u1ee9ng d\u1ee5ng hi\u1ec7u su\u1ea5t cao<\/strong>.<\/p>\n<p>K\u1ef9 thu\u1eadt t\u00edn hi\u1ec7u vi sai c\u00f3 hi\u1ec7u qu\u1ea3 trong vi\u1ec7c gi\u1ea3m nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung, m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng g\u00f3p ph\u1ea7n t\u1ea1o ra b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u. C\u00e1c k\u1ef9 thu\u1eadt n\u1ed1i \u0111\u1ea5t th\u00edch h\u1ee3p, ch\u1eb3ng h\u1ea1n nh\u01b0 s\u1eed d\u1ee5ng m\u1eb7t \u0111\u1ea5t v\u1eefng ch\u1eafc, c\u0169ng \u0111\u00f3ng m\u1ed9t vai tr\u00f2 thi\u1ebft y\u1ebfu trong vi\u1ec7c gi\u1ea3m b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u.<\/p>\n<p>C\u00e1c v\u1eadt li\u1ec7u che ch\u1eafn, nh\u01b0 l\u00e1 \u0111\u1ed3ng ho\u1eb7c l\u1edbp ph\u1ee7 d\u1eabn \u0111i\u1ec7n, c\u00f3 th\u1ec3 ch\u1ee9a t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb, ng\u0103n ch\u00fang t\u1ecfa ra ngo\u00e0i. Ngo\u00e0i ra, chi\u1ebfn l\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u gi\u00fap gi\u1ea3m thi\u1ec3u di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p v\u00e0 gi\u1ea3m nguy c\u01a1 b\u1ee9c x\u1ea1 l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n<p>H\u01a1n n\u1eefa, vi\u1ec7c k\u1ebft h\u1ee3p b\u1ed9 l\u1ecdc EMI v\u00e0 h\u1ea1t ferrite c\u00f3 th\u1ec3 tri\u1ec7t ti\u00eau nhi\u1ec5u t\u1ea7n s\u1ed1 cao v\u00e0 ng\u0103n ch\u1eb7n b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u. B\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n c\u00e1c chi\u1ebfn l\u01b0\u1ee3c thi\u1ebft k\u1ebf n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf PCB c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u b\u1ee9c x\u1ea1 t\u00edn hi\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u su\u1ea5t cao trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p>\n<h2>\u0110\u1ecbnh tuy\u1ebfn \u0111i\u1ec7n v\u00e0 m\u1eb7t \u0111\u1ea5t hi\u1ec7u qu\u1ea3<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/optimize_circuit_power_distribution.jpg\" alt=\"t\u1ed1i \u01b0u h\u00f3a ph\u00e2n ph\u1ed1i \u0111i\u1ec7n m\u1ea1ch\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>\u0110\u1ecbnh tuy\u1ebfn hi\u1ec7u qu\u1ea3 t\u00edn hi\u1ec7u ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ph\u00e1t th\u1ea3i EMI v\u00ec n\u00f3 l\u00e0m gi\u1ea3m di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p v\u00e0 ng\u0103n ch\u1eb7n b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb kh\u00f4ng mong mu\u1ed1n. \u0110i\u1ec1u n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7u su\u1ea5t cao.<\/p>\n<p>\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn hi\u1ec7u qu\u1ea3, h\u00e3y xem x\u00e9t c\u00e1c chi\u1ebfn l\u01b0\u1ee3c ch\u00ednh sau:<\/p>\n<ol>\n<li><strong>T\u00e1ch bi\u1ec7t d\u1ea5u v\u1ebft \u0111i\u1ec7n v\u00e0 m\u1eb7t \u0111\u1ea5t<\/strong> \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 gi\u1ea3m nhi\u1ec5u.<\/li>\n<li><strong>Thi\u1ebft k\u1ebf m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i \u0111i\u1ec7n ph\u00f9 h\u1ee3p<\/strong> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ee9c \u0111i\u1ec7n \u00e1p \u1ed5n \u0111\u1ecbnh v\u00e0 gi\u1ea3m ti\u1ebfng \u1ed3n.<\/li>\n<li><strong>S\u1eed d\u1ee5ng m\u1eb7t \u0111\u1ea5t r\u1eafn v\u00e0 m\u1eb7t ph\u1eb3ng \u0111i\u1ec7n<\/strong> \u0111\u1ec3 t\u1ea1o ra c\u00e1c \u0111\u01b0\u1eddng d\u1eabn c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p cho t\u00edn hi\u1ec7u ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t.<\/li>\n<li><strong>C\u1ea9n th\u1eadn \u0111\u1eb7t c\u00e1c k\u1ebft n\u1ed1i ngu\u1ed3n v\u00e0 n\u1ed1i \u0111\u1ea5t<\/strong> \u0111\u1ec3 gi\u1ea3m s\u1ee5t \u00e1p v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c v\u1ea5n \u0111\u1ec1 EMI.<\/li>\n<\/ol>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Nh\u1eefng k\u1ef9 thu\u1eadt \u0111\u1ec3 tr\u1ea5n \u00e1p Emi l\u00e0 g\u00ec?<\/h3>\n<p>L\u00e0 k\u1ebb ph\u00e1 ho\u1ea1i th\u1ea7m l\u1eb7ng c\u1ee7a thi\u1ebft k\u1ebf \u0111i\u1ec7n t\u1eed, <strong>EMI<\/strong> \u1ea9n n\u1ea5p trong b\u00f3ng t\u1ed1i, ch\u1edd \u0111\u1ee3i \u0111\u1ec3 ph\u00e1 v\u1ee1 ngay c\u1ea3 nh\u1eefng m\u1ea1ch \u0111i\u1ec7n \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1ec9 m\u1ec9 nh\u1ea5t.<\/p>\n<p>V\u00ec v\u1eady, c\u00e1c k\u1ef9 thu\u1eadt \u0111\u1ec3 ng\u0103n ch\u1eb7n EMI l\u00e0 g\u00ec? C\u00e1c chi\u1ebfn l\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 bao g\u1ed3m vi\u1ec7c th\u1ef1c hi\u1ec7n \u0111\u00fang <strong>n\u1ed1i \u0111\u1ea5t<\/strong>&#44; <strong>che ch\u1eafn<\/strong>v\u00e0 t\u00e1ch c\u00e1c t\u1ee5 \u0111i\u1ec7n \u0111\u1ec3 l\u1ecdc nhi\u1ec5u chuy\u1ec3n m\u1ea1ch.<\/p>\n<p>Ngo\u00e0i ra, c\u00e1c m\u1eb7t ph\u1eb3ng ngu\u1ed3n v\u00e0 m\u1eb7t \u0111\u1ea5t c\u00e1ch ly, \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u c\u1ea9n th\u1eadn v\u00e0 m\u1ea1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n tr\u1edf kh\u00e1ng th\u1ea5p c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u nhi\u1ec5u \u0111i\u1ec7n t\u1eeb.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1ea3m EMI trong thi\u1ebft k\u1ebf PCB?<\/h3>\n<p>\u0110\u1ec3 gi\u1ea3m EMI trong thi\u1ebft k\u1ebf PCB, c\u1ea7n ph\u1ea3i c\u00f3 c\u00e1ch ti\u1ebfp c\u1eadn \u0111a di\u1ec7n. Tri\u1ec3n khai ph\u00f9 h\u1ee3p <strong>k\u1ef9 thu\u1eadt n\u1ed1i \u0111\u1ea5t v\u00e0 che ch\u1eafn<\/strong> l\u00e0 quan tr\u1ecdng. \u0110\u1eb7t chi\u1ebfn l\u01b0\u1ee3c <strong>t\u1ee5 \u0111i\u1ec7n t\u00e1ch<\/strong> v\u00e0 vi\u1ec7c c\u00e1ch ly ngu\u1ed3n \u0111i\u1ec7n v\u00e0 m\u1eb7t \u0111\u1ea5t c\u0169ng l\u00e0 nh\u1eefng b\u01b0\u1edbc quan tr\u1ecdng.<\/p>\n<p>Ngo\u00e0i ra, c\u1ea9n th\u1eadn <strong>\u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u<\/strong> v\u00e0 vi\u1ec7c \u0111\u1eb7t c\u00e1c l\u1edbp t\u00edn hi\u1ec7u li\u1ec1n k\u1ec1 v\u1edbi m\u1eb7t ph\u1eb3ng m\u1eb7t \u0111\u1ea5t c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u EMI r\u1ea5t nhi\u1ec1u. B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 thi\u1ebft k\u1ebf n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf PCB c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u EMI m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb.<\/p>\n<h3>M\u1ed9t s\u1ed1 c\u00e2n nh\u1eafc kh\u00e1c c\u1ea7n thi\u1ebft cho thi\u1ebft k\u1ebf EMC EMI ngo\u00e0i vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc EMI l\u00e0 g\u00ec?<\/h3>\n<p>Ngo\u00e0i vi\u1ec7c s\u1eed d\u1ee5ng <strong>b\u1ed9 l\u1ecdc EMI<\/strong>, nh\u1eefng c\u00e2n nh\u1eafc quan tr\u1ecdng kh\u00e1c \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 <strong>Thi\u1ebft k\u1ebf EMC EMI<\/strong> bao g\u1ed3m vi\u1ec7c tri\u1ec3n khai m\u1ea1nh m\u1ebd <strong>k\u1ef9 thu\u1eadt n\u1ed1i \u0111\u1ea5t<\/strong>, \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u h\u1ee3p l\u00fd v\u00e0 v\u1ecb tr\u00ed th\u00e0nh ph\u1ea7n c\u1ea9n th\u1eadn.<\/p>\n<p>Ngo\u00e0i ra, vi\u1ec7c t\u00e1ch t\u00edn hi\u1ec7u s\u1ed1 v\u00e0 t\u00edn hi\u1ec7u analog, s\u1eed d\u1ee5ng m\u1ea1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n c\u00f3 tr\u1edf kh\u00e1ng th\u1ea5p v\u00e0 k\u1ebft h\u1ee3p c\u00e1c t\u1ee5 t\u00e1ch r\u1eddi l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<p>H\u01a1n th\u1ebf n\u1eefa, <strong>Ki\u1ec3m tra tu\u00e2n th\u1ee7<\/strong> v\u00e0 vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh, ch\u1eb3ng h\u1ea1n nh\u01b0 quy \u0111\u1ecbnh CISPR v\u00e0 FCC, l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o gi\u1ea3m EMI th\u00e0nh c\u00f4ng v\u00e0 gi\u1ea3m thi\u1ec3u nhi\u1ec5u \u0111i\u1ec7n t\u1eeb.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 tr\u00e1nh EMI v\u00e0 Emc?<\/h3>\n<p>\u0110\u1ec3 tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 EMI v\u00e0 EMC, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea3i \u00e1p d\u1ee5ng c\u00e1ch ti\u1ebfp c\u1eadn nhi\u1ec1u m\u1eb7t. Tri\u1ec3n khai ph\u00f9 h\u1ee3p <strong>k\u1ef9 thu\u1eadt n\u1ed1i \u0111\u1ea5t<\/strong>&#44; <strong>che ch\u1eafn c\u00e1c b\u1ed9 ph\u1eadn nh\u1ea1y c\u1ea3m<\/strong>v\u00e0 vi\u1ec7c t\u00e1ch t\u00edn hi\u1ec7u s\u1ed1 v\u00e0 t\u00edn hi\u1ec7u analog l\u00e0 r\u1ea5t quan tr\u1ecdng. Che ch\u1eafn hi\u1ec7u qu\u1ea3, tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n EMC v\u00e0 c\u1ea9n th\u1eadn <strong>\u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u<\/strong> c\u0169ng r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<p>Ngo\u00e0i ra, vi\u1ec7c s\u1eed d\u1ee5ng t\u1ee5 \u0111i\u1ec7n t\u00e1ch r\u1eddi v\u00e0 tu\u00e2n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t trong ng\u00e0nh c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u c\u00e1c th\u00e1ch th\u1ee9c v\u1ec1 EMI v\u00e0 EMC, \u0111\u1ea3m b\u1ea3o thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1eed hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"excerpt":{"rendered":"<p>H\u00e3y ch\u1ee9ng ki\u1ebfn ba m\u1eb9o thi\u1ebft k\u1ebf quan tr\u1ecdng n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb trong thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch in c\u1ee7a b\u1ea1n nh\u01b0 th\u1ebf n\u00e0o.<\/p>","protected":false},"author":9,"featured_media":1926,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[17],"tags":[],"class_list":["post-1927","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-layout-design-tips-guild"],"uagb_featured_image_src":{"full":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction.jpg",1006,575,false],"thumbnail":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction-150x150.jpg",150,150,true],"medium":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction-300x171.jpg",300,171,true],"medium_large":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction-768x439.jpg",768,439,true],"large":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction.jpg",1006,575,false],"1536x1536":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction.jpg",1006,575,false],"2048x2048":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction.jpg",1006,575,false],"trp-custom-language-flag":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_emi_reduction.jpg",18,10,false]},"uagb_author_info":{"display_name":"Ben Lau","author_link":"https:\/\/tryvary.com\/vi\/author\/wsbpmbzuog4q\/"},"uagb_comment_info":0,"uagb_excerpt":"Witness how these three crucial design tips can significantly reduce electromagnetic interference in your printed circuit board design.","_links":{"self":[{"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/posts\/1927","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/comments?post=1927"}],"version-history":[{"count":1,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/posts\/1927\/revisions"}],"predecessor-version":[{"id":2470,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/posts\/1927\/revisions\/2470"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/media\/1926"}],"wp:attachment":[{"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/media?parent=1927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/categories?post=1927"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tryvary.com\/vi\/wp-json\/wp\/v2\/tags?post=1927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}