{"id":6532,"date":"2025-09-25T11:12:00","date_gmt":"2025-09-25T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-is-signal-coupling-in-electronics\/"},"modified":"2026-06-22T06:44:25","modified_gmt":"2026-06-22T06:44:25","slug":"what-is-signal-coupling-in-electronics","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-signal-coupling-in-electronics","title":{"rendered":"Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u trong \u0111i\u1ec7n t\u1eed: Nguy\u00ean l\u00fd, C\u00e1c lo\u1ea1i v\u00e0 \u1ee8ng d\u1ee5ng"},"content":{"rendered":"<h2 class=\"wp-block-heading\" >\ud83d\udd39 Gi\u1edbi thi\u1ec7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trong \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i, vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u gi\u1eefa c\u00e1c m\u1ea1ch m\u00e0 kh\u00f4ng g\u00e2y nhi\u1ec5u kh\u00f4ng mong mu\u1ed1n l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Qu\u00e1 tr\u00ecnh n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u<\/strong>, \u0111\u1ea3m b\u1ea3o th\u00f4ng tin c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy\u1ec1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ed3ng th\u1eddi b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch kh\u1ecfi xung \u0111\u1ed9t \u0111i\u1ec7n \u00e1p m\u1ed9t chi\u1ec1u (DC) ho\u1eb7c c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 n\u1ed1i \u0111\u1ea5t. D\u00f9 trong b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u00e2m thanh, b\u1ed1 tr\u00ed m\u1ea1ch in (PCB), hay <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-ethernet-wired-networking-technology-explained\/\">m\u1ea1ng Ethernet<\/a>, gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng m\u00e0 m\u1ecdi k\u1ef9 s\u01b0 \u0111\u1ec1u c\u1ea7n hi\u1ec3u r\u00f5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u<\/strong> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n m\u1ed9t t\u00edn hi\u1ec7u xoay chi\u1ec1u (AC) t\u1eeb m\u1ea1ch n\u00e0y sang m\u1ea1ch kh\u00e1c trong khi ch\u1eb7n ho\u1eb7c c\u00e1ch ly d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) kh\u00f4ng mong mu\u1ed1n. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf chia s\u1ebb th\u00f4ng tin t\u00edn hi\u1ec7u m\u00e0 kh\u00f4ng truy\u1ec1n c\u00e1c \u0111\u1ed9 l\u1ec7ch \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng c\u00e1c linh ki\u1ec7n nh\u1ea1y c\u1ea3m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ef1c t\u1ebf, gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u n\u00e2ng cao <strong>\u0111\u1ed9 to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong>, gi\u1ea3m <strong>nhi\u1ec5u<\/strong>, v\u00e0 cung c\u1ea5p <strong>c\u00e1ch ly m\u1ea1ch<\/strong> trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng v\u00e0 cung c\u1ea5p \u0111i\u1ec7n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 C\u00e1c lo\u1ea1i gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10.webp\" alt=\"Signal Coupling\" class=\"wp-image-6530\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a92558a34d8644fcaeeebe53f6407a10-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >1. Gh\u00e9p n\u1ed1i dung t\u00ednh<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ecbnh ngh\u0129a:<\/strong> M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u1ed1i s\u1eed d\u1ee5ng m\u1ed9t <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-a-capacitor\/\">t\u1ee5 \u0111i\u1ec7n<\/a> t\u1ee5 \u0111i\u1ec7n.<\/p><\/li><li><p><strong>Nguy\u00ean l\u00fd:<\/strong> V\u00ec t\u1ee5 \u0111i\u1ec7n ch\u1eb7n d\u00f2ng DC nh\u01b0ng cho ph\u00e9p d\u00f2ng AC \u0111i qua, n\u00ean ch\u00fang cho ph\u00e9p truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u1ed3ng th\u1eddi lo\u1ea1i b\u1ecf \u0111\u1ed9 l\u1ec7ch DC.<\/p><\/li><li><p><strong>\u1ee8ng D\u1ee5ng:<\/strong><\/p><ul><li><p>C\u00e1c t\u1ea7ng \u0111\u1ea7u v\u00e0o\/\u0111\u1ea7u ra c\u1ee7a b\u1ed9 khu\u1ebfch \u0111\u1ea1i \u00e2m thanh<\/p><\/li><li><p>C\u00e1c m\u1ea1ch truy\u1ec1n th\u00f4ng d\u00f9ng \u0111\u1ec3 l\u1ecdc t\u00edn hi\u1ec7u<\/p><\/li><li><p>Thi\u1ebft k\u1ebf t\u1ea7n s\u1ed1 cao <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-pcb-printed-circuit-board\/\">PCB<\/a> designs<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Gh\u00e9p n\u1ed1i dung t\u00ednh l\u00e0 k\u1ef9 thu\u1eadt ph\u1ed5 bi\u1ebfn nh\u1ea5t v\u00ec n\u00f3 \u0111\u01a1n gi\u1ea3n, chi ph\u00ed th\u1ea5p v\u00e0 r\u1ea5t hi\u1ec7u qu\u1ea3 \u0111\u1ed1i v\u1edbi t\u00edn hi\u1ec7u \u1edf d\u1ea3i t\u1ea7n trung \u0111\u1ebfn cao.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >2. Gh\u00e9p n\u1ed1i bi\u1ebfn \u00e1p (c\u1ea3m t\u00ednh)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ecbnh ngh\u0129a:<\/strong> M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p gh\u00e9p n\u1ed1i s\u1eed d\u1ee5ng bi\u1ebfn \u00e1p ho\u1eb7c <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-an-inductor\/\">cu\u1ed9n c\u1ea3m<\/a> cu\u1ed9n c\u1ea3m gh\u00e9p.<\/p><\/li><li><p><strong>Nguy\u00ean l\u00fd:<\/strong> Bi\u1ebfn \u00e1p cung c\u1ea5p c\u00e1ch ly galvanic gi\u1eefa c\u00e1c m\u1ea1ch trong khi truy\u1ec1n t\u00edn hi\u1ec7u AC. N\u00f3 c\u0169ng cho ph\u00e9p <strong>ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng<\/strong>, ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng.<\/p><\/li><li><p><strong>\u1ee8ng D\u1ee5ng:<\/strong><\/p><ul><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">Bi\u1ebfn \u00e1p m\u1ea1ng Ethernet LAN<\/a><\/p><\/li><li><p>H\u1ec7 th\u1ed1ng RF v\u00e0 vi\u1ec5n th\u00f4ng<\/p><\/li><li><p>M\u1ea1ch c\u00e1ch ly ngu\u1ed3n \u0111i\u1ec7n<\/p><\/li><\/ul><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Gh\u00e9p n\u1ed1i bi\u1ebfn \u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ph\u1ea7n c\u1ee9ng m\u1ea1ng, n\u01a1i c\u1ea3 \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u l\u1eabn kh\u1ea3 n\u0103ng c\u00e1ch ly \u0111\u1ec1u r\u1ea5t quan tr\u1ecdng.<\/p>\n\n\n\n<hr class=\"wp-block-separator\" \/>\n\n\n\n<h3 class=\"wp-block-heading\" >3. Gh\u00e9p n\u1ed1i tr\u1ef1c ti\u1ebfp (gh\u00e9p n\u1ed1i DC)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>\u0110\u1ecbnh ngh\u0129a:<\/strong> N\u1ed1i tr\u1ef1c ti\u1ebfp hai m\u1ea1ch v\u1edbi nhau m\u00e0 kh\u00f4ng d\u00f9ng t\u1ee5 \u0111i\u1ec7n hay bi\u1ebfn \u00e1p.<\/p><\/li><li><p><strong>\u01afu \u0111i\u1ec3m:<\/strong> Cho ph\u00e9p c\u1ea3 th\u00e0nh ph\u1ea7n AC v\u00e0 DC \u0111i qua.<\/p><\/li><li><p><strong>H\u1ea1n ch\u1ebf:<\/strong> Nguy c\u01a1 ch\u00eanh l\u1ec7ch \u0111i\u1ec7n \u00e1p ho\u1eb7c \u0111\u1ed9 l\u1ec7ch DC \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c m\u1ea1ch ph\u00eda sau.<\/p><\/li><li><p><strong>\u1ee8ng D\u1ee5ng:<\/strong> B\u1ed9 khu\u1ebfch \u0111\u1ea1i t\u1ea7n s\u1ed1 th\u1ea5p v\u00e0 m\u1ea1ch logic k\u1ef9 thu\u1eadt s\u1ed1, n\u01a1i c\u00e1c m\u1ee9c \u0111i\u1ec7n \u00e1p DC ph\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean.<\/p><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u trong \u0111i\u1ec7n t\u1eed v\u00e0 m\u1ea1ng m\u00e1y t\u00ednh<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong <strong>truy\u1ec1n th\u00f4ng d\u1eef li\u1ec7u, truy\u1ec1n t\u1ea3i \u00e2m thanh v\u00e0 \u0111\u1ecbnh tuy\u1ebfn t\u00edn hi\u1ec7u tr\u00ean m\u1ea1ch in (PCB)<\/strong>. V\u00ed d\u1ee5, trong m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao, <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\"><strong>B\u1ed9 bi\u1ebfn \u00e1p LAN<\/strong><\/a> bi\u1ebfn \u00e1p m\u1ea1ng Ethernet <strong>1,5 kV\u20132 kV <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/lan-transformer-isolation-voltage-explained\/\"><strong>c\u00e1ch ly<\/strong><\/a>, b\u1ea3o v\u1ec7 c\u00e1c chipset kh\u1ecfi c\u00e1c xung \u0111i\u1ec7n, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/esd-protection-link-pp-smart-factory-transceivers-rj45-cage\/\">ESD<\/a>, v\u00e0 ch\u00eanh l\u1ec7ch \u0111i\u1ec7n th\u1ebf n\u1ed1i \u0111\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LINK-PP, v\u1edbi t\u01b0 c\u00e1ch l\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t h\u00e0ng \u0111\u1ea7u c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\"><strong>m\u00f4-\u0111un bi\u1ebfn \u00e1p Ethernet<\/strong><\/a>, b\u1ed9 gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u <strong>truy\u1ec1n d\u1eabn t\u00edn hi\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 t\u1ed1c \u0111\u1ed9 cao<\/strong> trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, \u00f4 t\u00f4 v\u00e0 vi\u1ec5n th\u00f4ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\ud83d\udd39 K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m l\u00fd thuy\u1ebft \u2014 m\u00e0 c\u00f2n l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt th\u1ef1c ti\u1ec5n nh\u1eb1m truy\u1ec1n t\u00edn hi\u1ec7u m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3. Gh\u00e9p n\u1ed1i dung t\u00ednh l\u00fd t\u01b0\u1edfng cho vi\u1ec7c c\u00e1ch ly AC, gh\u00e9p n\u1ed1i bi\u1ebfn \u00e1p cung c\u1ea5p c\u1ea3 c\u00e1ch ly l\u1eabn ph\u1ed1i h\u1ee3p tr\u1edf kh\u00e1ng, c\u00f2n gh\u00e9p n\u1ed1i tr\u1ef1c ti\u1ebfp ph\u1ee5c v\u1ee5 c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t khi c\u1ea7n duy tr\u00ec t\u00ednh li\u00ean t\u1ee5c c\u1ee7a th\u00e0nh ph\u1ea7n DC.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb <strong>\u0111i\u1ec7n t\u1eed \u00e2m thanh<\/strong> to <strong>y\u00eau c\u1ea7u<\/strong>, vi\u1ec7c l\u00e0m ch\u1ee7 gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u gi\u00fap thi\u1ebft k\u1ebf t\u1ed1t h\u01a1n, \u0111\u1ed9 tin c\u1eady cao h\u01a1n v\u00e0 hi\u1ec7u n\u0103ng h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 kh\u00e1i ni\u1ec7m gh\u00e9p n\u1ed1i t\u00edn hi\u1ec7u, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a gh\u00e9p n\u1ed1i dung kh\u00e1ng v\u00e0 gh\u00e9p n\u1ed1i bi\u1ebfn \u00e1p, c\u0169ng nh\u01b0 vai tr\u00f2 thi\u1ebft y\u1ebfu c\u1ee7a ch\u00fang trong \u0111i\u1ec7n t\u1eed, m\u1ea1ng m\u00e1y t\u00ednh v\u00e0 thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch in (PCB).<\/p>","protected":false},"author":1,"featured_media":6531,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[23],"class_list":["post-6532","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-link-pp-lan-transformers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6532","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=6532"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6532\/revisions"}],"predecessor-version":[{"id":11073,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/6532\/revisions\/11073"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/6531"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=6532"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=6532"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=6532"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}