{"id":3455,"date":"2025-12-04T14:58:00","date_gmt":"2025-12-04T14:58:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/ffe-feed-forward-equalizer-complete-guide\/"},"modified":"2026-06-22T04:20:29","modified_gmt":"2026-06-22T04:20:29","slug":"ffe-feed-forward-equalizer-complete-guide","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/ffe-feed-forward-equalizer-complete-guide","title":{"rendered":"FFE trong C\u00e1c M\u00f4-\u0111un Quang: H\u01b0\u1edbng d\u1eabn Ho\u00e0n ch\u1ec9nh v\u1ec1 B\u1ed9 B\u00f9 Ti\u1ec1n Ph\u1ea3n H\u1ed3i"},"content":{"rendered":"<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\/2ed90bc43c164ab986f7ad6d996b582e.webp\" alt=\"FFE (Feed-Forward Equalizer)\" class=\"wp-image-3452\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2ed90bc43c164ab986f7ad6d996b582e.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2ed90bc43c164ab986f7ad6d996b582e-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2ed90bc43c164ab986f7ad6d996b582e-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2ed90bc43c164ab986f7ad6d996b582e-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/2ed90bc43c164ab986f7ad6d996b582e-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>FFE (B\u1ed9 c\u00e2n b\u1eb1ng truy\u1ec1n th\u1eb3ng) l\u00e0 g\u00ec? <\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>C\u00e2n b\u1eb1ng truy\u1ec1n th\u1eb3ng (FFE)<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng c\u00f4ng ngh\u1ec7 quan tr\u1ecdng nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng s\u1ed1 t\u1ed1c \u0111\u1ed9 cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\"><strong>b\u1ed9 thu ph\u00e1t quang<\/strong><\/a>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/serdes-interfaces-high-speed-data-transfer-and-signal-integrity\/\"><strong>SerDes<\/strong><\/a><strong> c\u00e1c giao di\u1ec7n<\/strong>, and <strong>\u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ed3ng tr\u00ean m\u1eb7t ph\u1eb3ng sau (backplane)\/\u0111\u01b0\u1eddng truy\u1ec1n \u0111\u1ed3ng t\u1ed1c \u0111\u1ed9 cao<\/strong>.<br\/>Khi t\u1ed1c \u0111\u1ed9 d\u1eef li\u1ec7u v\u01b0\u1ee3t qu\u00e1 10G, 25G, 50G v\u00e0 ti\u1ebfn t\u1edbi c\u00e1c m\u1ee9c t\u00edn hi\u1ec7u PAM4 100G, 200G v\u00e0 400G, t\u1ed5n hao k\u00eanh v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/intersymbol-interference-isi-in-digital-communication-explained\/\">nhi\u1ec5u gi\u1eefa c\u00e1c k\u00fd hi\u1ec7u (ISI)<\/a> t\u0103ng m\u1ea1nh. \u0110\u1ec3 kh\u1eafc ph\u1ee5c c\u00e1c suy gi\u1ea3m n\u00e0y, b\u1ed9 ph\u00e1t hi\u1ec7n \u0111\u1ea1i ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o FFE nh\u1eb1m <strong>ti\u1ec1n x\u1eed l\u00fd<\/strong> t\u00edn hi\u1ec7u tr\u01b0\u1edbc khi t\u00edn hi\u1ec7u \u0111i v\u00e0o k\u00eanh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">FFE l\u00e0 m\u1ed9t <strong>b\u1ed9 c\u00e2n b\u1eb1ng tuy\u1ebfn t\u00ednh \u1edf ph\u00eda b\u1ed9 ph\u00e1t<\/strong> \u0111\u1ecbnh h\u00ecnh d\u1ea1ng s\u00f3ng \u0111\u1ea7u ra b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng b\u1ed9 l\u1ecdc ti\u00ean ti\u1ebfn, th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai v\u1edbi nhi\u1ec1u \u0111i\u1ec3m tap (v\u00ed d\u1ee5: tap ch\u00ednh, tap tr\u01b0\u1edbc, tap sau).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ee5c ti\u00eau c\u1ee7a n\u00f3 r\u1ea5t \u0111\u01a1n gi\u1ea3n:<br\/><strong>b\u00f9 l\u1ea1i t\u1ed5n hao k\u00eanh <em>tr\u01b0\u1edbc khi<\/em> t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 m\u1edf m\u1eaft (eye opening) t\u1ea1i b\u1ed9 thu.<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a FFE trong c\u00e1c b\u1ed9 ph\u00e1t t\u1ed1c \u0111\u1ed9 cao<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">FFE ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n th\u1eb3ng (forward path), ngh\u0129a l\u00e0 n\u00f3 <strong>not<\/strong> kh\u00f4ng d\u1ef1a v\u00e0o c\u00e1c quy\u1ebft \u0111\u1ecbnh tr\u01b0\u1edbc \u0111\u00f3 (kh\u00e1c v\u1edbi DFE). Thay v\u00e0o \u0111\u00f3, n\u00f3 \u0111i\u1ec1u ch\u1ec9nh bi\u00ean \u0111\u1ed9 v\u00e0 th\u1eddi \u0111i\u1ec3m c\u1ee7a c\u00e1c chuy\u1ec3n ti\u1ebfp th\u00f4ng qua c\u00e1c \u0111i\u1ec3m tap c\u00f3 tr\u1ecdng s\u1ed1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >H3: C\u00e1c ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a FFE<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>Ti\u1ec1n nh\u1ea5n (Pre-emphasis)<\/strong>: T\u0103ng c\u01b0\u1eddng c\u00e1c th\u00e0nh ph\u1ea7n t\u1ea7n s\u1ed1 cao s\u1ebd b\u1ecb suy gi\u1ea3m b\u1edfi k\u00eanh.<\/p><\/li><li><p><strong>H\u1eadu nh\u1ea5n (De-emphasis)<\/strong>: Gi\u1ea3m c\u00e1c th\u00e0nh ph\u1ea7n t\u1ea7n s\u1ed1 th\u1ea5p \u0111\u1ec3 duy tr\u00ec s\u1ef1 c\u00e2n b\u1eb1ng.<\/p><\/li><li><p><strong>B\u00f9 nhi\u1ec5u gi\u1eefa c\u00e1c k\u00fd hi\u1ec7u (ISI compensation)<\/strong>: Gi\u1ea3m thi\u1ec3u c\u1ea3 ISI ti\u1ec1n k\u00fd hi\u1ec7u (precursor) v\u00e0 ISI h\u1eadu k\u00fd hi\u1ec7u (post-cursor).<\/p><\/li><li><p><strong>N\u00e2ng cao bi\u1ec3u \u0111\u1ed3 m\u1eaft (Eye diagram enhancement)<\/strong>: T\u1ea1o ra c\u00e1c chuy\u1ec3n ti\u1ebfp s\u1eafc n\u00e9t h\u01a1n v\u00e0 c\u1ea3i thi\u1ec7n c\u00e1c l\u1ec1 \u0111\u1ee9ng\/ngang.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">FFE th\u01b0\u1eddng \u0111\u01b0\u1ee3c tri\u1ec3n khai theo m\u1ed9t trong c\u00e1c ki\u1ebfn tr\u00fac sau: <strong>t\u01b0\u01a1ng t\u1ef1 (analog)<\/strong>, <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/digital-signal-processor-functionality-in-optical-transceivers\/\"><strong>d\u1ef1a tr\u00ean DSP<\/strong><\/a>, or <strong>lai (hybrid)<\/strong> t\u00f9y thu\u1ed9c v\u00e0o d\u1ea1ng module quang (SFP28, QSFP28, QSFP56, QSFP-DD, v.v.).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>V\u00ec sao FFE l\u1ea1i quan tr\u1ecdng trong c\u00e1c b\u1ed9 thu ph\u00e1t quang?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c module quang t\u1ed1c \u0111\u1ed9 cao d\u1ef1a v\u00e0o FFE \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c t\u00edn hi\u1ec7u \u0111i\u1ec7n \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i v\u1eabn c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c sau khi \u0111i qua c\u00e1c m\u1ea1ch in (PCB traces), \u0111\u1ea7u n\u1ed1i, v\u1ecf b\u1ecdc (packages) v\u00e0 giao di\u1ec7n SerDes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >L\u1ee3i \u00edch c\u1ee7a FFE trong c\u00e1c module quang<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u00f9 l\u1ea1i t\u1ed5n hao t\u1ea7n s\u1ed1 cao ngay t\u1ea1i ngu\u1ed3n<\/strong><\/p><\/li><li><p><strong>Gi\u1ea3m g\u00e1nh n\u1eb7ng cho b\u1ed9 c\u00e2n b\u1eb1ng \u1edf ph\u00eda b\u1ed9 thu (CTLE + DFE)<\/strong><\/p><\/li><li><p><strong>C\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n li\u00ean k\u1ebft tr\u00ean c\u00e1c k\u00eanh PCB v\u00e0 k\u00eanh ch\u1ee7 (host) d\u00e0i h\u01a1n<\/strong><\/p><\/li><li><p><strong>X\u1eed l\u00fd c\u1ea3 hai chu\u1ea9n <\/strong><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/what-is-the-difference-between-nrz-and-pam4\/\"><strong>NRZ v\u00e0 PAM4<\/strong><\/a><strong> y\u00eau c\u1ea7u<\/strong><\/p><\/li><li><p><strong>Gi\u1ea3m t\u1ef7 l\u1ec7 l\u1ed7i bit (BER) v\u00e0 n\u00e2ng cao kh\u1ea3 n\u0103ng tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n IEEE<\/strong><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Hi\u1ec7n \u0111\u1ea1i <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">b\u1ed9 thu ph\u00e1t quang<\/a>\u2014 v\u00ed d\u1ee5 nh\u01b0 <strong>SFP+, SFP28, QSFP28, QSFP56 v\u00e0 QSFP-DD<\/strong>\u2014 y\u00eau c\u1ea7u c\u00e1c thi\u1ebft l\u1eadp FFE \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cao \u0111\u1ec3 v\u01b0\u1ee3t qua c\u00e1c b\u00e0i ki\u1ec3m tra tu\u00e2n th\u1ee7 host nh\u01b0 IEEE 802.3 KR\/KR4\/KP4.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b.webp\" alt=\"LINK-PP Optical Modules\" class=\"wp-image-3453\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/ef281b869ba041c88f7f00cb3b673a6b-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>Gi\u1ea3i th\u00edch c\u1ea5u tr\u00fac c\u00e1c \u0111i\u1ec3m tap c\u1ee7a FFE<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">FFE s\u1eed d\u1ee5ng nhi\u1ec1u \u0111i\u1ec3m tap, m\u1ed7i \u0111i\u1ec3m \u0111\u00f3ng g\u00f3p m\u1ed9t phi\u00ean b\u1ea3n t\u00edn hi\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi tr\u1ecdng s\u1ed1 t\u01b0\u01a1ng \u1ee9ng:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 \u0110i\u1ec3m tap ch\u00ednh (Main Tap)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e1c \u0111\u1ecbnh bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u ch\u00ednh.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 \u0110i\u1ec3m tap tr\u01b0\u1edbc (Pre-Tap \u2013 B\u00f9 ti\u1ec1n k\u00fd hi\u1ec7u)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">T\u0103ng c\u01b0\u1eddng ho\u1eb7c suy gi\u1ea3m t\u00edn hi\u1ec7u <em>tr\u01b0\u1edbc khi<\/em> tr\u01b0\u1edbc k\u00fd hi\u1ec7u hi\u1ec7n t\u1ea1i nh\u1eb1m ch\u1ed1ng l\u1ea1i nhi\u1ec5u ti\u1ec1n k\u00fd hi\u1ec7u (precursor ISI).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 \u0110i\u1ec3m tap sau (Post-Tap \u2013 B\u00f9 h\u1eadu k\u00fd hi\u1ec7u)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ec9nh s\u1eeda m\u00e9o do c\u00e1c bit \u0111\u00e3 truy\u1ec1n tr\u01b0\u1edbc g\u00e2y ra.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >\u25b7 T\u1ed1i \u01b0u h\u00f3a cho PAM4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi t\u00edn hi\u1ec7u PAM4 50G\/100G, FFE \u0111\u00f3ng vai tr\u00f2 thi\u1ebft y\u1ebfu trong vi\u1ec7c \u0111\u1ecbnh h\u00ecnh t\u00edn hi\u1ec7u b\u1ed1n m\u1ee9c \u0111\u1ed3ng th\u1eddi gi\u1ea3m thi\u1ec3u s\u1ef1 ch\u1ed3ng l\u1ea5n gi\u1eefa c\u00e1c k\u00fd hi\u1ec7u.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>So s\u00e1nh FFE, CTLE v\u00e0 DFE \u2014 \u0110i\u1ec3m kh\u00e1c bi\u1ec7t l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea3ng so s\u00e1nh ng\u1eafn g\u1ecdn d\u01b0\u1edbi \u0111\u00e2y l\u00e0m r\u00f5 vai tr\u00f2 c\u1ee7a t\u1eebng b\u1ed9 c\u00e2n b\u1eb1ng:<\/p>\n\n\n\n<figure class=\"wp-block-table\">\n<table class=\"has-fixed-layout\">\n<colgroup><col style=\"width: 149px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><col style=\"min-width: 25px;\"\/><\/colgroup><tbody><tr><th colspan=\"1\" rowspan=\"1\" colwidth=\"149\"><p>B\u1ed9 c\u00e2n b\u1eb1ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>V\u1ecb tr\u00ed<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee9c n\u0103ng<\/p><\/th><th colspan=\"1\" rowspan=\"1\"><p>L\u1ee3i \u00edch Ch\u00ednh<\/p><\/th><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"149\"><p><strong>FFE<br><\/strong><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u cu\u1ed1i b\u1ed9 ph\u00e1t (Tx Front-End)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ti\u1ec1n nh\u1ea5n \/ h\u1eadu nh\u1ea5n<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Ch\u1ee7 \u0111\u1ed9ng b\u00f9 t\u1ed5n hao tr\u01b0\u1edbc khi truy\u1ec1n<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"149\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/continuous-time-linear-equalizer-ctle-in-optics-transceivers\/\"><strong>CTLE<br><\/strong><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>\u0110\u1ea7u cu\u1ed1i t\u01b0\u01a1ng t\u1ef1 ph\u00eda b\u1ed9 thu (Rx Analog Front-End)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>T\u0103ng c\u01b0\u1eddng t\u1ea7n s\u1ed1 cao tuy\u1ebfn t\u00ednh<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Kh\u00f4i ph\u1ee5c d\u1ea3i th\u00f4ng v\u1edbi nhi\u1ec5u th\u1ea5p<\/p><\/td><\/tr><tr><td colspan=\"1\" rowspan=\"1\" colwidth=\"149\"><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/decision-feedback-equalizer-dfe-technical-overview\/\"><strong>DFE<br><\/strong><\/a><\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>Giai \u0111o\u1ea1n s\u1ed1 ph\u00eda b\u1ed9 thu (Rx Digital Stage)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>H\u1ee7y nhi\u1ec5u h\u1eadu k\u00fd hi\u1ec7u (post-cursor ISI)<\/p><\/td><td colspan=\"1\" rowspan=\"1\"><p>R\u1ea5t hi\u1ec7u qu\u1ea3 \u0111\u1ed1i v\u1edbi c\u00e1c k\u00eanh d\u00e0i<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" >Hi\u1ec3u v\u1ec1 ki\u1ebfn tr\u00fac c\u00e2n b\u1eb1ng lai (Hybrid EQ Architecture)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c SerDes hi\u1ec7n \u0111\u1ea1i v\u00e0 <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">module quang<br><\/a> d\u1ef1a v\u00e0o <strong>FFE + CTLE + DFE<\/strong> ph\u1ed1i h\u1ee3p c\u00f9ng nhau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p>FFE \u0111\u1ecbnh h\u00ecnh d\u1ea1ng s\u00f3ng \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i<\/p><\/li><li><p>CTLE b\u00f9 l\u1ea1i t\u1ed5n hao t\u1ea7n s\u1ed1 cao \u1edf d\u1ea1ng t\u01b0\u01a1ng t\u1ef1<\/p><\/li><li><p>DFE lo\u1ea1i b\u1ecf ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a ISI \u1edf d\u1ea1ng s\u1ed1<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ki\u1ebfn tr\u00fac \u0111a giai \u0111o\u1ea1n n\u00e0y \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng truy\u1ec1n th\u00f4ng \u0111\u00e1ng tin c\u1eady ngay c\u1ea3 \u1edf c\u00e1c t\u1ed1c \u0111\u1ed9 baud c\u1ef1c cao.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>\u1ee8ng d\u1ee5ng c\u1ee7a FFE trong c\u00e1c h\u1ec7 th\u1ed1ng t\u1ed1c \u0111\u1ed9 cao<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">FFE l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu trong nhi\u1ec1u h\u1ec7 th\u1ed1ng:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" >C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">B\u1ed9 thu ph\u00e1t quang<\/a> (c\u00e1c module SFP28, QSFP28, QSFP56, 100G\/200G\/400G)<\/p><\/li><li><p>Card m\u1ea1ng m\u00e1y ch\u1ee7 (NIC) v\u00e0 b\u1ed9 t\u0103ng t\u1ed1c AI<\/p><\/li><li><p>B\u1ed9 chuy\u1ec3n m\u1ea1ch v\u00e0 b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn<\/p><\/li><li><p>C\u00e1c li\u00ean k\u1ebft m\u1eb7t ph\u1eb3ng sau (backplane) v\u00e0 m\u1eb7t ph\u1eb3ng gi\u1eefa (midplane) t\u1ed1c \u0111\u1ed9 cao<\/p><\/li><li><p>SerDes PCIe 4.0\/5.0\/6.0<\/p><\/li><li><p><a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-26454-dac-aoc-aec-cables.htm\">C\u00e1p ch\u1ee7 \u0111\u1ed9ng AOC\/DAC<\/a><\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">FFE kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ef1a ch\u1ecdn \u2014 m\u00e0 l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 tu\u00e2n th\u1ee7 v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u \u0111\u00e1ng tin c\u1eady.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" ><strong>\u2705 <\/strong>K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>FFE (B\u1ed9 c\u00e2n b\u1eb1ng ti\u1ebfn)<\/strong> l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 n\u1ec1n t\u1ea3ng trong truy\u1ec1n th\u00f4ng s\u1ed1 t\u1ed1c \u0111\u1ed9 cao. N\u00f3 ch\u1ee7 \u0111\u1ed9ng b\u00f9 t\u1ed5n hao k\u00eanh t\u1ea1i b\u1ed9 ph\u00e1t th\u00f4ng qua ti\u1ec1n nh\u1ea5n v\u00e0 h\u1eadu nh\u1ea5n, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 ch\u1ea5t l\u01b0\u1ee3ng bi\u1ec3u \u0111\u1ed3 m\u1eaft v\u00e0 gi\u1ea3m t\u1ef7 l\u1ec7 l\u1ed7i bit (BER).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f9ng v\u1edbi CTLE v\u00e0 DFE, FFE gi\u00fap \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n c\u1ee7a c\u00e1c <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-25432-optics-transceivers-sfp-modules.htm\">b\u1ed9 thu ph\u00e1t quang<\/a> hi\u1ec7n \u0111\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ea1 t\u1ea7ng 5G, trung t\u00e2m d\u1eef li\u1ec7u, \u0111i\u1ec7n to\u00e1n \u0111\u00e1m m\u00e2y v\u00e0 c\u1ee5m m\u00e1y t\u00ednh AI.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u FFE (B\u1ed9 B\u00f9 Ti\u1ec1n Ph\u1ea3n H\u1ed3i) l\u00e0 g\u00ec, c\u00e1ch l\u00e0m vi\u1ec7c c\u1ee7a b\u00f9 \u0111\u1eafp truy\u1ec1n v\u00e0 t\u1ea1i sao FFE l\u00e0 thi\u1ebft y\u1ebfu cho c\u00e1c m\u00f4-\u0111un quang t\u1ed1c \u0111\u1ed9 cao v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u SerDes.<\/p>","protected":false},"author":1,"featured_media":3454,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27],"tags":[19,26],"class_list":["post-3455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-aoc-dac-cables","tag-optics-transceivers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3455","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=3455"}],"version-history":[{"count":5,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3455\/revisions"}],"predecessor-version":[{"id":10799,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/3455\/revisions\/10799"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/3454"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=3455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=3455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=3455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}