{"id":2370,"date":"2025-09-03T01:59:36","date_gmt":"2025-09-03T01:59:36","guid":{"rendered":"https:\/\/flj-pcb.com\/?page_id=2370"},"modified":"2025-09-10T08:44:32","modified_gmt":"2025-09-10T08:44:32","slug":"high-speed-pcb","status":"publish","type":"page","link":"https:\/\/flj-pcb.com\/vi\/pcb-manufacturer\/high-speed-pcb\/","title":{"rendered":"B\u1ea3ng m\u1ea1ch in t\u1ed1c \u0111\u1ed9 cao"},"content":{"rendered":"
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Thi\u1ebft k\u1ebf m\u1ea1ch in t\u1ed1c \u0111\u1ed9 cao<\/h1>
Thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao l\u00e0 b\u1ea5t k\u1ef3 thi\u1ebft k\u1ebf n\u00e0o m\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u b\u1eaft \u0111\u1ea7u b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd c\u1ee7a PCB, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed1 tr\u00ed m\u1ea1ch, c\u00e1ch \u0111\u00f3ng g\u00f3i, c\u00e1c k\u1ebft n\u1ed1i v\u00e0 c\u1ea5u tr\u00fac l\u1edbp.
C\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i \u0111ang \u0111\u1ea9y t\u1ed1c \u0111\u1ed9 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i v\u00e0 t\u1ea7n s\u1ed1 \u0111\u1ed3ng h\u1ed3 l\u00ean m\u1ee9c cao h\u01a1n. Ng\u00e0y nay, nhi\u1ec1u h\u1ec7 th\u1ed1ng k\u1ef9 thu\u1eadt s\u1ed1 c\u00f3 t\u1ea7n s\u1ed1 t\u00edn hi\u1ec7u v\u01b0\u1ee3t qu\u00e1 100 MHz. \u1ede nh\u1eefng t\u1ed1c \u0111\u1ed9 n\u00e0y, c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng li\u00ean quan \u0111\u1ebfn \u0111\u01b0\u1eddng truy\u1ec1n xu\u1ea5t hi\u1ec7n tr\u00ean c\u00e1c \u0111\u01b0\u1eddng d\u1eabn tr\u00ean b\u1ea3ng m\u1ea1ch in (PCB) v\u00e0 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng. Qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao ch\u00ednh l\u00e0 qu\u00e1 tr\u00ecnh gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u do t\u1ed1c \u0111\u1ed9 cao g\u00e2y ra. M\u1ecdi ng\u01b0\u1eddi th\u01b0\u1eddng s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef \u201cPCB t\u1ed1c \u0111\u1ed9 cao\u201d, v\u1eady ch\u00ednh x\u00e1c th\u00ec b\u1ea3ng m\u1ea1ch PCB t\u1ed1c \u0111\u1ed9 cao l\u00e0 g\u00ec?
Theo m\u1ed9t quan \u0111i\u1ec3m, m\u1ea1ch s\u1ed1 \u0111\u01b0\u1ee3c coi l\u00e0 t\u1ed1c \u0111\u1ed9 cao khi t\u1ea7n s\u1ed1 c\u1ee7a n\u00f3 \u0111\u1ea1t ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 kho\u1ea3ng 45\u201350 MHz v\u00e0 c\u00e1c t\u00edn hi\u1ec7u \u1edf t\u1ea7n s\u1ed1 \u0111\u00f3 chi\u1ebfm h\u01a1n m\u1ed9t ph\u1ea7n ba h\u1ec7 th\u1ed1ng. Tr\u00ean th\u1ef1c t\u1ebf, c\u00e1c t\u1ea7n s\u1ed1 h\u00e0i c\u1ee7a t\u00edn hi\u1ec7u cao h\u01a1n t\u1ea7n s\u1ed1 c\u01a1 b\u1ea3n c\u1ee7a n\u00f3. Nh\u1eefng thay \u0111\u1ed5i nhanh ch\u00f3ng \u2014 c\u00e1c c\u1ea1nh t\u0103ng v\u00e0 gi\u1ea3m ho\u1eb7c c\u00e1c qu\u00e1 tr\u00ecnh chuy\u1ec3n ti\u1ebfp \u2014 g\u00e2y ra c\u00e1c k\u1ebft qu\u1ea3 truy\u1ec1n d\u1eabn kh\u00f4ng mong mu\u1ed1n. M\u1ed9t quy t\u1eafc th\u1ef1c ti\u1ec5n ph\u1ed5 bi\u1ebfn l\u00e0: n\u1ebfu \u0111\u1ed9 tr\u1ec5 truy\u1ec1n d\u1eabn c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n l\u1edbn h\u01a1n m\u1ed9t n\u1eeda th\u1eddi gian t\u0103ng c\u1ee7a t\u00edn hi\u1ec7u k\u1ef9 thu\u1eadt s\u1ed1, th\u00ec t\u00edn hi\u1ec7u \u0111\u00f3 \u0111\u01b0\u1ee3c coi l\u00e0 t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao v\u00e0 c\u00e1c hi\u1ec7u \u1ee9ng c\u1ee7a \u0111\u01b0\u1eddng truy\u1ec1n s\u1ebd c\u00f3 \u1ea3nh h\u01b0\u1edfng.
Vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u di\u1ec5n ra v\u00e0o th\u1eddi \u0111i\u1ec3m t\u00edn hi\u1ec7u thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i, v\u00ed d\u1ee5 nh\u01b0 trong th\u1eddi gian t\u0103ng ho\u1eb7c gi\u1ea3m. M\u1ed9t t\u00edn hi\u1ec7u c\u1ea7n m\u1ed9t kho\u1ea3ng th\u1eddi gian c\u1ed1 \u0111\u1ecbnh \u0111\u1ec3 truy\u1ec1n t\u1eeb b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ebfn b\u1ed9 thu. N\u1ebfu th\u1eddi gian truy\u1ec1n nh\u1ecf h\u01a1n m\u1ed9t n\u1eeda th\u1eddi gian t\u0103ng ho\u1eb7c gi\u1ea3m, th\u00ec b\u1ea5t k\u1ef3 ph\u1ea3n x\u1ea1 n\u00e0o t\u1eeb b\u1ed9 thu s\u1ebd \u0111\u1ebfn b\u1ed9 \u0111i\u1ec1u khi\u1ec3n tr\u01b0\u1edbc khi t\u00edn hi\u1ec7u ho\u00e0n t\u1ea5t vi\u1ec7c thay \u0111\u1ed5i. N\u1ebfu th\u1eddi gian truy\u1ec1n l\u1edbn h\u01a1n m\u1ed9t n\u1eeda th\u1eddi gian t\u0103ng ho\u1eb7c gi\u1ea3m, ph\u1ea3n x\u1ea1 s\u1ebd quay tr\u1edf l\u1ea1i sau khi t\u00edn hi\u1ec7u \u0111\u00e3 thay \u0111\u1ed5i. N\u1ebfu ph\u1ea3n x\u1ea1 \u0111\u1ee7 l\u1edbn, d\u1ea1ng s\u00f3ng t\u1ed5ng h\u1ee3p c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i logic.
T\u00f3m l\u1ea1i, \u0111\u1ec3 thi\u1ebft k\u1ebf m\u1ed9t b\u1ea3ng m\u1ea1ch in (PCB) t\u1ed1c \u0111\u1ed9 cao ch\u1ea5t l\u01b0\u1ee3ng cao, b\u1ea1n ph\u1ea3i xem x\u00e9t c\u1ea3 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u l\u1eabn t\u00ednh to\u00e0n v\u1eb9n ngu\u1ed3n \u0111i\u1ec7n. Ch\u00fang ta c\u0169ng c\u1ea7n n\u1eafm r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao v\u00e0 t\u00edn hi\u1ec7u t\u1ea7n s\u1ed1 cao. C\u00e1c t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp th\u01b0\u1eddng bi\u1ec3u hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u, nh\u01b0ng nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n ngu\u1ed3n \u0111i\u1ec7n. T\u00ednh to\u00e0n v\u1eb9n ngu\u1ed3n \u0111i\u1ec7n \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea3ng m\u1ea1ch.
Khi b\u1ea1n b\u1eaft \u0111\u1ea7u thi\u1ebft k\u1ebf m\u1ed9t b\u1ea3ng m\u1ea1ch v\u00e0 g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 \u0111\u1ed9 tr\u1ec5, nhi\u1ec5u ch\u00e9o, ph\u1ea3n x\u1ea1 ho\u1eb7c ph\u00e1t x\u1ea1 kh\u00f4ng mong mu\u1ed1n, b\u1ea1n \u0111\u00e3 b\u01b0\u1edbc v\u00e0o l\u0129nh v\u1ef1c thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao.
Thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao l\u00e0 vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch in cho c\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao. \u0110\u00e2y l\u00e0 nh\u1eefng m\u1ea1ch m\u00e0 c\u00e1c y\u1ebfu t\u1ed1 v\u1eadt l\u00fd c\u1ee7a b\u1ea3ng m\u1ea1ch \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u. C\u00e1c y\u1ebfu t\u1ed1 v\u1eadt l\u00fd \u0111\u00f3 bao g\u1ed3m b\u1ed1 tr\u00ed, c\u1ea5u tr\u00fac l\u1edbp v\u00e0 c\u00e1c k\u1ebft n\u1ed1i.
Khi thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao, b\u1ea1n ph\u1ea3i d\u00e0nh nhi\u1ec1u th\u1eddi gian h\u01a1n b\u00ecnh th\u01b0\u1eddng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed ch\u00ednh x\u00e1c c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng d\u1eabn, chi\u1ec1u r\u1ed9ng c\u1ee7a ch\u00fang, kho\u1ea3ng c\u00e1ch gi\u1eefa ch\u00fang v\u1edbi c\u00e1c t\u00edn hi\u1ec7u kh\u00e1c, c\u0169ng nh\u01b0 lo\u1ea1i linh ki\u1ec7n m\u00e0 c\u00e1c \u0111\u01b0\u1eddng d\u1eabn n\u00e0y k\u1ebft n\u1ed1i.<\/div>

1. T\u00edn hi\u1ec7u v\u00e0 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/h2>
D\u00f9 b\u1ea1n \u0111ang thi\u1ebft k\u1ebf PCB th\u00f4ng th\u01b0\u1eddng hay PCB t\u1ed1c \u0111\u1ed9 cao, b\u1ea3ng m\u1ea1ch v\u1eabn truy\u1ec1n t\u00edn hi\u1ec7u d\u1ecdc theo c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn c\u00e1c \u0111i\u1ec3m cu\u1ed1i. V\u1eady t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao l\u00e0 g\u00ec? C\u00f3 hai lo\u1ea1i ch\u00ednh: t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 v\u00e0 t\u00edn hi\u1ec7u s\u1ed1.<\/div>

1.1 T\u00edn hi\u1ec7u s\u1ed1<\/h3>
T\u00edn hi\u1ec7u s\u1ed1 \u0111\u01a1n gi\u1ea3n h\u01a1n t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1. Ch\u00fang l\u00e0 m\u1ed9t chu\u1ed7i c\u00e1c m\u1ee9c th\u1ea5p v\u00e0 cao. B\u1ea1n c\u00f3 th\u1ec3 h\u00ecnh dung ch\u00fang nh\u01b0 s\u1ed1 0 v\u00e0 1, ho\u1eb7c tr\u1ea1ng th\u00e1i t\u1eaft v\u00e0 b\u1eadt.<\/div>

1.2 T\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1<\/h3>
T\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 bi\u1ebfn \u0111\u1ed5i nhi\u1ec1u h\u01a1n t\u00edn hi\u1ec7u s\u1ed1. Ch\u00fang c\u00f3 th\u1ec3 dao \u0111\u1ed9ng gi\u1eefa c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m. T\u00edn hi\u1ec7u thay \u0111\u1ed5i v\u1ec1 bi\u00ean \u0111\u1ed9 v\u00e0 t\u1ea7n s\u1ed1.<\/div>

\u00a0<\/p>

Khi thi\u1ebft k\u1ebf m\u1ea1ch, h\u00e3y l\u01b0u \u00fd nh\u1eefng v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c sau \u0111\u00e2y \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u su\u1ea5t c\u1ee7a b\u1ea3ng m\u1ea1ch.<\/div>

2. C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>

2.1 C\u00e1c v\u1ea5n \u0111\u1ec1<\/h3>
Thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao l\u00e0 m\u1ed9t c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi s\u1ef1 ch\u00ednh x\u00e1c cao. B\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ba v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p m\u00e0 b\u1ea1n c\u1ea7n l\u01b0u \u00fd.<\/div>

\u00a0<\/p>

  • Th\u1eddi \u0111i\u1ec3m<\/strong>: N\u1ebfu th\u1eddi gian truy\u1ec1n t\u00edn hi\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c, d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1ecb l\u1ed7i. Do c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1eddi gian, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn v\u00e0 m\u1ecdi t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 \u0111\u1ec1u \u0111\u1ebfn \u0111\u00fang th\u1eddi \u0111i\u1ec3m so v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c t\u00edn hi\u1ec7u kh\u00e1c.<\/li>
  • S\u1ef1 bi\u1ebfn d\u1ea1ng<\/strong>: T\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u c\u00f3 ngh\u0129a l\u00e0 t\u00edn hi\u1ec7u \u0111\u1ebfn \u0111\u00edch v\u1edbi d\u1ea1ng \u0111\u00fang. N\u1ebfu t\u00edn hi\u1ec7u kh\u00f4ng \u0111\u00fang d\u1ea1ng t\u1ea1i c\u00e1c \u0111i\u1ec3m cu\u1ed1i, c\u00f3 kh\u1ea3 n\u0103ng ch\u00fang \u0111\u00e3 b\u1ecb bi\u1ebfn d\u1ea1ng trong qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eabn.<\/li>
  • Ti\u1ebfng \u1ed3n<\/strong>: M\u1ecdi b\u1ea3ng m\u1ea1ch in (PCB) \u0111\u1ec1u t\u1ea1o ra m\u1ed9t \u00edt nhi\u1ec5u. Tuy nhi\u00ean, nhi\u1ec5u qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng d\u1eef li\u1ec7u. Nhi\u1ec5u th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n khi m\u1ed9t t\u00edn hi\u1ec7u dao \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c t\u00edn hi\u1ec7u l\u00e2n c\u1eadn.<\/li><\/ul>

    2.2 C\u00e1c gi\u1ea3i ph\u00e1p<\/h3>
    May m\u1eafn thay, nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y \u0111\u00e3 c\u00f3 gi\u1ea3i ph\u00e1p kh\u1eafc ph\u1ee5c. Ch\u00fang l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng trong thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao.<\/div>

    \u00a0<\/p>

    • Tr\u1edf kh\u00e1ng<\/strong>: Ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng l\u00e0 gi\u1ea3i ph\u00e1p c\u01a1 b\u1ea3n cho nhi\u1ec1u v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p tr\u00ean b\u1ea3ng m\u1ea1ch in (PCB). Khi tr\u1edf kh\u00e1ng gi\u1eefa b\u1ed9 ph\u00e1t v\u00e0 b\u1ed9 thu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ch\u00ednh x\u00e1c, ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u, t\u00ednh to\u00e0n v\u1eb9n v\u00e0 \u0111\u1ed9 nh\u1ea1y s\u1ebd \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n.<\/li>
    • Ph\u00f9 h\u1ee3p<\/strong>: Vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 d\u00e0i gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian. N\u1ebfu b\u1ea1n \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 d\u00e0i c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i sao cho kh\u1edbp nhau, ch\u00fang s\u1ebd \u0111\u1ebfn c\u00f9ng l\u00fac v\u00e0 duy tr\u00ec s\u1ef1 \u0111\u1ed3ng b\u1ed9 v\u1edbi \u0111\u1ed3ng h\u1ed3.<\/li>
    • Kho\u1ea3ng c\u00e1ch<\/strong>: Gi\u1eef kho\u1ea3ng c\u00e1ch \u0111\u1ee7 r\u1ed9ng gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch s\u1ebd gi\u00fap b\u1ea3o v\u1ec7 ch\u00fang kh\u1ecfi nhi\u1ec5u v\u00e0 c\u00e1c t\u00e1c \u0111\u1ed9ng can thi\u1ec7p kh\u00e1c. Tr\u00e1nh \u0111\u1eb7t c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch qu\u00e1 g\u1ea7n nhau \u0111\u1ec3 gi\u1ea3m thi\u1ec3u nhi\u1ec5u.<\/li><\/ul>

      3. Thi\u1ebft k\u1ebf m\u1ea1ch in t\u1ed1c \u0111\u1ed9 cao<\/h2>
      Khi n\u00f3i v\u1ec1 nh\u1eefng y\u1ebfu t\u1ed1 t\u1ea1o n\u00ean m\u1ed9t b\u1ea3ng m\u1ea1ch in (PCB) t\u1ed1c \u0111\u1ed9 cao, h\u00e3y nh\u1edb r\u1eb1ng c\u00f3 r\u1ea5t nhi\u1ec1u quy t\u1eafc b\u1ed1 tr\u00ed c\u1ea7n tu\u00e2n th\u1ee7. Vi\u1ec7c l\u00ean k\u1ebf ho\u1ea1ch b\u1ed1 tr\u00ed t\u1eeb s\u1edbm s\u1ebd gi\u00fap d\u1ef1 \u00e1n ti\u1ebfn h\u00e0nh \u0111\u00fang ti\u1ebfn \u0111\u1ed9 v\u00e0 gi\u1ea3m thi\u1ec3u sai s\u00f3t.<\/div>

      3.1 S\u01a1 \u0111\u1ed3<\/h3>
      B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean l\u00e0 v\u1ebd s\u01a1 \u0111\u1ed3 m\u1ea1ch. Trong khi v\u1ebd, h\u00e3y suy ngh\u0129 v\u1ec1 h\u01b0\u1edbng truy\u1ec1n t\u00edn hi\u1ec7u. H\u00e3y c\u1ed1 g\u1eafng th\u1ec3 hi\u1ec7n h\u01b0\u1edbng truy\u1ec1n t\u1ef1 nhi\u00ean t\u1eeb tr\u00e1i sang ph\u1ea3i v\u00e0 \u0111\u01b0a v\u00e0o c\u00e0ng nhi\u1ec1u th\u00f4ng tin h\u1eefu \u00edch c\u00e0ng t\u1ed1t.<\/div>

      3.2 Y\u00eau c\u1ea7u<\/h3>
      Vi\u1ebft h\u01b0\u1edbng d\u1eabn b\u1ed1 tr\u00ed m\u1ea1ch in (PCB) r\u00f5 r\u00e0ng. Bao g\u1ed3m m\u1ee5c \u0111\u00edch c\u1ee7a b\u1ea3ng m\u1ea1ch, b\u1ea3n ph\u00e1c th\u1ea3o m\u1ea1ch, c\u1ea5u tr\u00fac l\u1edbp c\u1ee7a b\u1ea3ng m\u1ea1ch, v\u1ecb tr\u00ed \u0111\u1eb7t linh ki\u1ec7n, v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng d\u1eabn v\u00e0 m\u1ea1ch. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 c\u1ea7n ghi ch\u00fa c\u00e1c lo\u1ea1i t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean t\u1eebng l\u1edbp. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng t\u00edn hi\u1ec7u RF, h\u00e3y xem x\u00e9t thi\u1ebft k\u1ebf PCB d\u00e0nh cho RF. T\u00edn hi\u1ec7u RF c\u00f3 nh\u1eefng y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t. H\u00e3y li\u1ec7t k\u00ea t\u1ea5t c\u1ea3 c\u00e1c y\u00eau c\u1ea7u c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea3ng m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh.<\/div>

      3.3 Vi\u1ec7c s\u1eafp x\u1ebfp<\/h3>
      Vi\u1ec7c b\u1ed1 tr\u00ed linh ki\u1ec7n l\u00e0 m\u1ed9t trong nh\u1eefng ph\u1ea7n quan tr\u1ecdng nh\u1ea5t c\u1ee7a thi\u1ebft k\u1ebf m\u1ea1ch. H\u00e3y c\u00e2n nh\u1eafc v\u1ecb tr\u00ed c\u1ee7a c\u00e1c m\u1ea1ch tr\u00ean b\u1ea3ng m\u1ea1ch v\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n xung quanh ch\u00fang.<\/div>

      3.4 M\u1ea1ch b\u1ecf qua ngu\u1ed3n<\/h3>
      \u0110\u1ec3 gi\u1ea3m nhi\u1ec5u trong c\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao, h\u00e3y th\u1ef1c hi\u1ec7n k\u1ebft n\u1ed1i bypass cho c\u00e1c ch\u00e2n c\u1ea5p ngu\u1ed3n c\u1ee7a b\u1ed9 khu\u1ebfch \u0111\u1ea1i. \u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i ho\u1ea1t \u0111\u1ed9ng t\u1ed1c \u0111\u1ed9 cao, c\u00f3 hai k\u1ef9 thu\u1eadt bypass ph\u1ed5 bi\u1ebfn. M\u1ed9t l\u00e0 k\u1ef9 thu\u1eadt bypass t\u1eeb \u0111\u01b0\u1eddng ngu\u1ed3n \u0111\u1ebfn \u0111\u1ea5t, th\u01b0\u1eddng hi\u1ec7u qu\u1ea3 trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p. Ngo\u00e0i ra, m\u1ed9t s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1eb7c bi\u1ec7t kh\u00e1c c\u0169ng h\u1eefu \u00edch trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p c\u1ee5 th\u1ec3.<\/div>

      3.5 \u0110i\u1ec7n dung k\u00fd sinh<\/h3>
      C\u00e1c th\u00e0nh ph\u1ea7n k\u00fd sinh l\u00e0 nh\u1eefng t\u1ee5 \u0111i\u1ec7n v\u00e0 cu\u1ed9n c\u1ea3m kh\u00f4ng mong mu\u1ed1n len l\u1ecfi v\u00e0o c\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao v\u00e0 g\u00e2y ra s\u1ef1 c\u1ed1. Ch\u00fang d\u1ec5 d\u00e0ng h\u00ecnh th\u00e0nh v\u00e0 c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng thi\u1ebft k\u1ebf. C\u00e1c m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao r\u1ea5t d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c th\u00e0nh ph\u1ea7n k\u00fd sinh.<\/div>

      3.6 M\u1eb7t ph\u1eb3ng \u0111\u1ea5t<\/h3>
      M\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec7n \u00e1p tham chi\u1ebfu, cung c\u1ea5p kh\u1ea3 n\u0103ng che ch\u1eafn, h\u1ed7 tr\u1ee3 t\u1ea3n nhi\u1ec7t v\u00e0 gi\u1ea3m \u0111\u1ed9 t\u1ef1 c\u1ea3m r\u00f2 r\u1ec9. Tuy nhi\u00ean, c\u1ea7n l\u01b0u \u00fd: m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra \u0111i\u1ec7n dung k\u00fd sinh. Trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, b\u1ea1n n\u00ean s\u1eed d\u1ee5ng m\u1ed9t m\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t \u0111\u1ea7y \u0111\u1ee7, kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n v\u00e0 \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c c\u1ee7a n\u00f3.<\/div>

      3.7 \u0110\u00f3ng g\u00f3i<\/h3>
      B\u1ed9 khu\u1ebfch \u0111\u1ea1i ho\u1ea1t \u0111\u1ed9ng (op-amp) v\u00e0 c\u00e1c linh ki\u1ec7n kh\u00e1c c\u00f3 nhi\u1ec1u lo\u1ea1i v\u1ecf b\u1ecdc kh\u00e1c nhau. Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1ecf b\u1ecdc \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t \u1edf t\u1ea7n s\u1ed1 cao. V\u1ecf b\u1ecdc c\u0169ng t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n dung ph\u1ee5 v\u00e0 vi\u1ec7c b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng m\u1ea1ch.<\/div>

      3.8 \u0110\u1ecbnh tuy\u1ebfn v\u00e0 c\u00e1ch ly<\/h3>
      Vi\u1ec7c b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn v\u00e0 che ch\u1eafn gi\u00fap gi\u1ea3m nhi\u1ec5u gi\u1eefa c\u00e1c t\u00edn hi\u1ec7u. Thi\u1ebft k\u1ebf PCB cung c\u1ea5p nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn v\u00e0 che ch\u1eafn. M\u1eb7t ph\u1eb3ng n\u1ed1i \u0111\u1ea5t l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p che ch\u1eafn hi\u1ec7u qu\u1ea3. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 b\u1ed1 tr\u00ed c\u00e1c \u0111\u01b0\u1eddng d\u1eabn vu\u00f4ng g\u00f3c v\u1edbi nhau tr\u00ean c\u00e1c l\u1edbp li\u1ec1n k\u1ec1 \u0111\u1ec3 gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng gh\u00e9p \u0111i\u1ec7n dung v\u00e0 gi\u1eef kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c \u0111\u01b0\u1eddng d\u1eabn xa h\u01a1n.<\/div>

      4. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n c\u00f3 t\u1ed1c \u0111\u1ed9 cao hay kh\u00f4ng<\/h2>
      Kh\u00f4ng c\u00f3 quy t\u1eafc duy nh\u1ea5t v\u00e0 tuy\u1ec7t \u0111\u1ed1i n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1ebf n\u00e0o l\u00e0 thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao, nh\u01b0ng c\u00f3 m\u1ed9t s\u1ed1 c\u00e1ch th\u1ef1c ti\u1ec5n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n c\u00f3 ph\u1ea3i l\u00e0 thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao hay kh\u00f4ng. C\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u l\u00e0 m\u1ed9t d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng. N\u1ebfu b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c tr\u00ean m\u1ed9t chi\u1ebfc \u0111i\u1ec7n tho\u1ea1i ho\u1eb7c bo m\u1ea1ch ch\u1ee7, r\u1ea5t c\u00f3 th\u1ec3 \u0111\u00f3 l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao. Vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t s\u1ed1 c\u00f4ng ngh\u1ec7 nh\u1ea5t \u0111\u1ecbnh c\u0169ng l\u00e0 m\u1ed9t manh m\u1ed1i quan tr\u1ecdng.<\/div>

      \u00a0<\/p>

      1. Bo m\u1ea1ch c\u00f3 c\u00e1c c\u1ed5ng giao ti\u1ebfp t\u1ed1c \u0111\u1ed9 cao kh\u00f4ng?<\/strong>
        M\u1ed9t c\u00e1ch nhanh ch\u00f3ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem b\u1ea1n c\u00f3 c\u1ea7n tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao hay kh\u00f4ng l\u00e0 ki\u1ec3m tra xem tr\u00ean bo m\u1ea1ch c\u00f3 c\u00e1c giao di\u1ec7n t\u1ed1c \u0111\u1ed9 cao hay kh\u00f4ng. V\u00ed d\u1ee5 nh\u01b0 DDR, PCIe v\u00e0 c\u00e1c giao di\u1ec7n video nh\u01b0 DVI ho\u1eb7c HDMI. T\u1ea5t c\u1ea3 c\u00e1c giao di\u1ec7n n\u00e0y \u0111\u1ec1u y\u00eau c\u1ea7u tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c quy t\u1eafc thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao. Ngo\u00e0i ra, \u0111\u1ed1i v\u1edbi m\u1ed7i giao di\u1ec7n, h\u00e3y ghi r\u00f5 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c c\u1ee7a k\u00eanh trong t\u00e0i li\u1ec7u c\u1ee7a b\u1ea1n.<\/div><\/li>
      2. T\u1ef7 l\u1ec7 gi\u1eefa \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn v\u00e0 b\u01b0\u1edbc s\u00f3ng t\u00edn hi\u1ec7u<\/strong>
        M\u1ed9t ki\u1ec3m tra th\u00f4ng th\u01b0\u1eddng l\u00e0 t\u1ef7 l\u1ec7 gi\u1eefa chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn v\u00e0 b\u01b0\u1edbc s\u00f3ng c\u1ee7a t\u00edn hi\u1ec7u m\u00e0 b\u1ea1n truy\u1ec1n t\u1ea3i. N\u1ebfu chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn n\u1eb1m trong c\u00f9ng m\u1ed9t c\u1ea5p \u0111\u1ed9 v\u1edbi b\u01b0\u1edbc s\u00f3ng t\u00edn hi\u1ec7u, b\u1ea3ng m\u1ea1ch c\u00f3 th\u1ec3 s\u1ebd c\u1ea7n tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao. M\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n, nh\u01b0 DDR, y\u00eau c\u1ea7u chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c dung sai ch\u1eb7t ch\u1ebd. M\u1ed9t nguy\u00ean t\u1eafc \u0111\u01a1n gi\u1ea3n l\u00e0: n\u1ebfu chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn v\u00e0 b\u01b0\u1edbc s\u00f3ng n\u1eb1m trong c\u00f9ng m\u1ed9t c\u1ea5p \u0111\u1ed9, b\u1ea1n n\u00ean xem x\u00e9t \u00e1p d\u1ee5ng thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao.<\/div><\/li>
      3. Bo m\u1ea1ch c\u00f3 giao di\u1ec7n kh\u00f4ng d\u00e2y ho\u1eb7c \u0103ng-ten<\/strong>
        M\u1ecdi bo m\u1ea1ch k\u1ebft n\u1ed1i v\u1edbi \u0103ng-ten, d\u00f9 \u0103ng-ten \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p tr\u1ef1c ti\u1ebfp tr\u00ean bo m\u1ea1ch hay \u0111\u01b0\u1ee3c g\u1eafn qua \u0111\u1ea7u n\u1ed1i, \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng \u0111\u1eb7c bi\u1ec7t trong thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao v\u00e0 RF. \u0102ng-ten tr\u00ean xe c\u0169ng \u0111\u00f2i h\u1ecfi ph\u1ea3i ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng ch\u1eb7t ch\u1ebd v\u00e0 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng d\u1eabn. N\u1ebfu s\u1eed d\u1ee5ng \u0111\u1ea7u n\u1ed1i SMA ho\u1eb7c c\u00e1c lo\u1ea1i \u0111\u1ea7u n\u1ed1i RF t\u01b0\u01a1ng t\u1ef1, h\u00e3y b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn v\u1edbi tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi gi\u00e1 tr\u1ecb c\u1ee7a \u0111\u1ea7u n\u1ed1i.<\/div><\/li>
      4. H\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n v\u00e0 nhi\u1ec1u m\u1ea1ch con<\/strong>
        N\u1ebfu d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n bao g\u1ed3m nhi\u1ec1u m\u1ea1ch con c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp trong m\u1ed9t h\u1ec7 th\u1ed1ng l\u1edbn h\u01a1n, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi nh\u1eefng th\u00e1ch th\u1ee9c li\u00ean quan \u0111\u1ebfn PCB t\u1ed1c \u0111\u1ed9 cao. Vi\u1ec7c c\u00f3 nhi\u1ec1u m\u00f4-\u0111un, nhi\u1ec1u li\u00ean k\u1ebft t\u1ed1c \u0111\u1ed9 cao v\u00e0 c\u00e1c mi\u1ec1n th\u1eddi gian h\u1ed7n h\u1ee3p l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng b\u1ea1n c\u1ea7n ph\u1ea3i ch\u00fa tr\u1ecdng \u0111\u1ebfn thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao.<\/div><\/li><\/ol>

        5. V\u1eadt li\u1ec7u b\u1ea3ng m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao<\/h2>
        Thu\u1eadt ng\u1eef \u201cv\u1eadt li\u1ec7u b\u1ea3ng m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao\u201d r\u1ea5t ph\u1ed5 bi\u1ebfn trong ng\u00e0nh. Thu\u1eadt ng\u1eef n\u00e0y th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 ch\u1ec9 c\u00e1c v\u1eadt li\u1ec7u c\u00f3 t\u1ed5n hao th\u1ea5p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c b\u1ea3ng m\u1ea1ch in (PCB) t\u1ed1c \u0111\u1ed9 cao. So v\u1edbi FR-4 th\u00f4ng th\u01b0\u1eddng, c\u00e1c v\u1eadt li\u1ec7u n\u00e0y c\u00f3 h\u1ec7 s\u1ed1 t\u1ed5n hao (tangent of loss) th\u1ea5p h\u01a1n, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Df. Df l\u00e0 g\u00ec v\u00e0 n\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00edn hi\u1ec7u nh\u01b0 th\u1ebf n\u00e0o?
        Khi m\u1ed9t m\u00f4i tr\u01b0\u1eddng c\u00e1ch \u0111i\u1ec7n nh\u01b0 v\u1ea3i s\u1ee3i th\u1ee7y tinh v\u00e0 nh\u1ef1a n\u1eb1m trong m\u1ed9t \u0111i\u1ec7n tr\u01b0\u1eddng, c\u00e1c h\u1ea1t mang \u0111i\u1ec7n trong m\u00f4i tr\u01b0\u1eddng n\u00e0y b\u1ecb r\u00e0ng bu\u1ed9c b\u00ean trong c\u00e1c ph\u00e2n t\u1eed. \u0110i\u1ec7n tr\u01b0\u1eddng b\u00ean ngo\u00e0i g\u00e2y ra nh\u1eefng s\u1ef1 d\u1ecbch chuy\u1ec3n nh\u1ecf. C\u00e1c l\u01b0\u1ee1ng c\u1ef1c trong m\u00f4i tr\u01b0\u1eddng sau \u0111\u00f3 s\u1ebd s\u1eafp x\u1ebfp theo h\u01b0\u1edbng c\u1ee7a \u0111i\u1ec7n tr\u01b0\u1eddng. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e2n c\u1ef1c \u0111i\u1ec7n m\u00f4i. N\u0103ng l\u01b0\u1ee3ng b\u1ecb m\u1ea5t trong qu\u00e1 tr\u00ecnh ph\u00e2n c\u1ef1c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i. Gi\u00e1 tr\u1ecb Df c\u1ee7a v\u1eadt li\u1ec7u \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 t\u1ed5n th\u1ea5t \u0111i\u1ec7n m\u00f4i c\u1ee7a v\u1eadt li\u1ec7u \u0111\u00f3.
        C\u00e1c v\u1eadt li\u1ec7u b\u1ea3ng m\u1ea1ch ti\u00eau chu\u1ea9n l\u00e0m suy gi\u1ea3m s\u00f3ng sin nhi\u1ec1u h\u01a1n so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao. Hi\u1ec7u \u1ee9ng n\u00e0y c\u00e0ng r\u00f5 r\u1ec7t h\u01a1n \u1edf c\u00e1c t\u1ea7n s\u1ed1 h\u00e0i cao. T\u00edn hi\u1ec7u s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb nhi\u1ec1u s\u00f3ng sin \u1edf c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau. N\u1ebfu c\u00e1c s\u00f3ng sin n\u00e0y b\u1ecb suy gi\u1ea3m, c\u00e1c c\u1ea1nh c\u1ee7a t\u00edn hi\u1ec7u s\u1ed1 s\u1ebd b\u1ecb suy gi\u1ea3m v\u00e0 bi\u00ean \u0111\u1ed9 gi\u1ea3m xu\u1ed1ng. S\u1ef1 suy gi\u1ea3m c\u1ea1nh l\u00e0m gi\u1ea3m b\u0103ng th\u00f4ng \u0111\u01b0\u1eddng truy\u1ec1n v\u00e0 l\u00e0m gi\u1ea3m bi\u00ean \u0111\u1ed9 t\u00edn hi\u1ec7u. S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao gi\u00fap gi\u1ea3m t\u1ed5n th\u1ea5t tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb chi\u1ec1u d\u00e0i. \u0110\u1ed1i v\u1edbi c\u00f9ng m\u1ed9t chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn, v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao mang l\u1ea1i b\u0103ng th\u00f4ng cao h\u01a1n v\u00e0 bi\u00ean \u0111\u1ed9 l\u1edbn h\u01a1n. Ho\u1eb7c, v\u1edbi c\u00f9ng m\u1ed9t ng\u00e2n s\u00e1ch t\u1ed5n th\u1ea5t, vi\u1ec7c s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao cho ph\u00e9p b\u1ea1n \u0111\u1ecbnh tuy\u1ebfn c\u00e1c \u0111\u01b0\u1eddng d\u1eabn d\u00e0i h\u01a1n m\u00e0 v\u1eabn \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t.
        M\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng hai chi\u1ebfc xe c\u00f3 m\u1ee9c ti\u00eau th\u1ee5 nhi\u00ean li\u1ec7u kh\u00e1c nhau. Chi\u1ebfc xe A ti\u00eau th\u1ee5 22 l\u00edt tr\u00ean 100 km (Df: 0,022). Ng\u01b0\u1eddi ta g\u1ecdi n\u00f3 l\u00e0 \u201cchi\u1ebfc xe ng\u1ed1n x\u0103ng\u201d. Chi\u1ebfc xe B ti\u00eau th\u1ee5 4,5 l\u00edt tr\u00ean 100 km (Df: 0,0045). Ng\u01b0\u1eddi ta g\u1ecdi n\u00f3 l\u00e0 \"chi\u1ebfc xe ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u\". N\u1ebfu b\u1ea1n ch\u1ec9 c\u00f3 50 l\u00edt nhi\u00ean li\u1ec7u v\u00e0 \u0111i\u1ec3m \u0111\u1ebfn c\u00e1ch 800 km, chi\u1ebfc xe \"ng\u1ed1n x\u0103ng\" s\u1ebd kh\u00f4ng th\u1ec3 \u0111\u1ebfn \u0111\u01b0\u1ee3c. Chi\u1ebfc xe ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u s\u1ebd \u0111\u1ebfn \u0111\u01b0\u1ee3c v\u00e0 v\u1eabn c\u00f2n nhi\u00ean li\u1ec7u d\u01b0. N\u1ebfu \u0111i\u1ec3m \u0111\u1ebfn ch\u1ec9 c\u00e1ch 200 km, chi\u1ebfc xe \"ng\u1ed1n x\u0103ng\" c\u00f3 th\u1ec3 \u0111\u1ebfn \u0111\u01b0\u1ee3c nh\u01b0ng c\u00f2n r\u1ea5t \u00edt nhi\u00ean li\u1ec7u, do \u0111\u00f3 bi\u00ean \u0111\u1ed9 an to\u00e0n nh\u1ecf v\u00e0 chuy\u1ebfn \u0111i s\u1ebd r\u1ee7i ro n\u1ebfu c\u00f3 s\u1ef1 c\u1ed1 x\u1ea3y ra. Chi\u1ebfc xe ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u x\u1eed l\u00fd chuy\u1ebfn \u0111i v\u1edbi bi\u00ean \u0111\u1ed9 an to\u00e0n t\u1ed1t h\u01a1n. V\u00ed d\u1ee5 n\u00e0y cho th\u1ea5y t\u1ea1i sao \u0111\u00f4i khi b\u1ea1n c\u1ea7n v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao. Khi t\u1ed1c \u0111\u1ed9 t\u00edn hi\u1ec7u cao, chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng d\u1eabn d\u00e0i ho\u1eb7c ng\u00e2n s\u00e1ch t\u1ed5n hao ch\u1eb7t ch\u1ebd, v\u1eadt li\u1ec7u th\u00f4ng th\u01b0\u1eddng c\u00f3 th\u1ec3 kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 bi\u00ean \u0111\u1ed9 an to\u00e0n. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady, ch\u00fang t\u00f4i khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao.
        C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u t\u1ed1c \u0111\u1ed9 cao \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo c\u00e1c c\u1ea5p \u0111\u1ed9 d\u1ef1a tr\u00ean ch\u1ec9 s\u1ed1 Df. Ch\u1ec9 s\u1ed1 Df ch\u1ec9 mang t\u00ednh ch\u1ea5t tham kh\u1ea3o. Lu\u00f4n s\u1eed d\u1ee5ng c\u00e1c s\u1ed1 li\u1ec7u ch\u00ednh x\u00e1c trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1eadt li\u1ec7u khi thi\u1ebft k\u1ebf.<\/div>

        5.1 C\u00e1c lo\u1ea1i Df th\u00f4ng d\u1ee5ng (c\u00e1c gi\u00e1 tr\u1ecb l\u00e0 tham chi\u1ebfu \u0111i\u1ec3n h\u00ecnh \u1edf t\u1ea7n s\u1ed1 10 GHz)<\/h3>
        • H\u1ec7 s\u1ed1 t\u1ed5n hao ti\u00eau chu\u1ea9n: Df < 0,022 @ 10 GHz<\/li>
        • V\u1eadt li\u1ec7u c\u00f3 h\u1ec7 s\u1ed1 suy hao trung b\u00ecnh: Df < 0,012 @ 10 GHz<\/li>
        • V\u1eadt li\u1ec7u c\u00f3 t\u1ed5n hao th\u1ea5p: Df < 0,008 @ 10 GHz<\/li>
        • V\u1eadt li\u1ec7u c\u00f3 t\u1ed5n hao r\u1ea5t th\u1ea5p: Df < 0,005 @ 10 GHz<\/li>
        • V\u1eadt li\u1ec7u c\u00f3 t\u1ed5n hao c\u1ef1c th\u1ea5p: Df < 0,003 @ 10 GHz<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

          High-speed PCB Design High-speed PCB design means any design where signal integrity starts to be affected by the PCB\u2019s physical […]<\/p>","protected":false},"author":1,"featured_media":0,"parent":1898,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","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":"disabled","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-5)","background-image":"","background-repeat":"repeat","background-position":"center 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          High-speed PCB Design<\\\/h1>
          High-speed PCB design means any design where signal integrity starts to be affected by the PCB\\u2019s physical properties, such as layout, packaging, interconnects, and layer stack-up.
          Modern electronics push edge rates and clock speeds higher. Today many digital systems have signal frequencies above 100 MHz. At those speeds, transmission-line effects appear on PCB traces and can seriously affect system behavior. The PCB design process for high speed is the process of solving the signal integrity problems that high speed creates. People use the term \\u201chigh-speed PCB\\u201d a lot, so what exactly is a high-speed PCB board?
          One view says a digital circuit is high speed when its rate reaches or exceeds about 45\\u201350 MHz and signals at that rate make up more than one third of the system. In fact, a signal\\u2019s harmonic frequencies are higher than its base frequency. Fast changes \\u2014 the rising and falling edges or transitions \\u2014 cause unexpected transmission results. A common practical rule is this: if a line\\u2019s propagation delay is greater than half of the digital signal\\u2019s rise time, that signal is treated as a high-speed signal and transmission-line effects matter.
          Signal transfer matters at the instant the signal changes state, for example during rise or fall time. A signal needs a fixed time to travel from driver to receiver. If the travel time is less than half the rise or fall time, then any reflection from the receiver will reach the driver before the signal finishes changing. If the travel time is longer than half the rise or fall time, the reflection returns after the change. If the reflection is large, the summed waveform can change the logic state.
          In short, to design a high-quality high-speed PCB you must think about both signal integrity and power integrity. We also need to know the difference between high-speed signals and high-frequency signals. The direct effects usually show up as signal integrity problems, but the root cause often links back to power integrity. Power integrity directly affects the final signal integrity of the board.
          When you start designing a board and you see trouble like delay, crosstalk, reflection, or unwanted emission, you are in the high-speed PCB design domain.
          High-speed PCB design is the layout of circuit boards for high-speed circuits. These are circuits where the board\\u2019s physical parts affect signal integrity. Those physical factors include layout, stack-up, and interconnects.
          When you do high-speed PCB design you must spend more time than usual on the exact placement of traces, their widths, how close they are to other signals, and the types of parts the traces connect to.<\\\/div>

          1. Signals and Signal Integrity<\\\/h2>
          Whether you work on ordinary or high-speed PCB design, the board sends signals along traces to endpoints. So what are high-speed signals? There are two main types: analog and digital.<\\\/div>

          1.1 Digital Signals<\\\/h3>
          Digital signals are simpler than analog signals. They are a series of low and high levels. You can think of them as 0 and 1, or off and on.<\\\/div>

          1.2 Analog Signals<\\\/h3>
          Analog signals vary more than digital signals. They may swing positive and negative. The signal changes by amplitude and by frequency.<\\\/div>

          \\u00a0<\\\/p>

          When you design a circuit, keep these common problems and fixes in mind to improve board performance.<\\\/div>

          2. Common Problems and Solutions<\\\/h2>

          2.1 Problems<\\\/h3>
          High-speed PCB design is very sensitive. You may meet several problems during a project. Here are three common problems to watch.<\\\/div>

          \\u00a0<\\\/p>

          • Timing<\\\/strong>: If signal timing is wrong you can get corrupted data. Because of timing issues, make sure every routed signal and every clock signal arrives at the right time relative to all other signals.<\\\/li>
          • Distortion<\\\/strong>: Signal integrity means signals arrive in the right shape. If signals do not look right at the endpoints, they likely suffered distortion along the way.<\\\/li>
          • Noise<\\\/strong>: Every PCB makes some noise. But too much noise can corrupt data. Noise often appears when one signal rings unexpectedly and affects nearby signals.<\\\/li><\\\/ul>

            2.2 Solutions<\\\/h3>
            Fortunately, these issues have known fixes. They are key parts of high-speed design.<\\\/div>

            \\u00a0<\\\/p>

            • Impedance<\\\/strong>: Impedance control is a basic fix for many common PCB problems. When the impedance between transmitter and receiver is correct, signal quality, integrity, and sensitivity improve.<\\\/li>
            • Matching<\\\/strong>: Length matching helps timing. If you match the lengths of coupled traces, they will arrive together and stay in sync with the clock.<\\\/li>
            • Spacing<\\\/strong>: Leaving enough space between traces helps protect them from noise and other interference. Avoid placing traces too close to reduce interference.<\\\/li><\\\/ul>

              3. High-speed PCB Layout<\\\/h2>
              When we talk about what makes a PCB high-speed, remember many layout rules apply. Planning layout early helps keep the project on schedule and reduces errors.<\\\/div>

              3.1 Schematic<\\\/h3>
              The first step is to draw the circuit as a schematic. While you draw, think about signal flow. Try to capture a natural left-to-right flow and include as much useful information as you can.<\\\/div>

              3.2 Requirements<\\\/h3>
              Write clear PCB layout instructions. Include the board\\u2019s purpose, a circuit sketch, the board stack-up, component placement, and spacing between traces and circuits. You may also need to note what types of signals go on each layer. For example, if you use RF, consider RF PCB design. RF signals have special needs. Put everything in the requirements that the board needs to work reliably.<\\\/div>

              3.3 Placement<\\\/h3>
              Component placement is one of the most important parts of layout. Think about where circuits sit on the board and what surrounds them.<\\\/div>

              3.4 Power Bypass<\\\/h3>
              To reduce noise in high-speed circuits, bypass amplifier power pins. For high-speed op-amps there are two common bypass techniques. One is rail-to-ground bypass, which works in most cases. Other special techniques are useful in some cases.<\\\/div>

              3.5 Parasitic Capacitance<\\\/h3>
              Parasitics are stray capacitors and inductors that sneak into high-speed layouts and cause problems. They form easily and can break the design. High-speed circuits are easily affected by parasitics.<\\\/div>

              3.6 Ground Plane<\\\/h3>
              A ground plane serves as a reference voltage, provides shielding, helps heat dissipation, and lowers stray inductance. But be careful: a ground plane can also add parasitic capacitance. In most cases you want a full, uninterrupted ground plane and keep it continuous.<\\\/div>

              3.7 Packaging<\\\/h3>
              Op-amps and other parts come in many packages. The package choice affects high-frequency performance. Packages influence parasitics and trace routing.<\\\/div>

              3.8 Routing and Shielding<\\\/h3>
              Routing and shielding reduce interference between signals. PCB design offers several routing and shielding methods. A ground plane is good shielding. You can also route traces orthogonally on adjacent layers to reduce capacitive coupling and keep traces farther apart.<\\\/div>

              4. How to Tell If Your Project Is High-Speed<\\\/h2>
              There is no single, absolute rule for what counts as a high-speed PCB design, but there are several practical ways to decide if your project is high-speed. Signal integrity problems are a clear sign. If you are working on a phone or a motherboard, that very likely is a high-speed design. The use of certain technologies is also a strong clue.<\\\/div>

              \\u00a0<\\\/p>

              1. Does the board have high-speed interfaces?<\\\/strong>
                A quick way to see if you must follow high-speed design rules is to check for high-speed interfaces on the board. Examples are DDR, PCIe, and video interfaces such as DVI or HDMI. All of these interfaces need strict high-speed design rules. Also, for each interface, include exact channel specs in your documentation.<\\\/div><\\\/li>
              2. Ratio of trace length to signal wavelength<\\\/strong>
                A common check is the ratio between your trace length and the wavelength of the signals you carry. If the trace length is on the same order as the signal wavelength, the board will likely need high-speed rules. Some standards, like DDR, require trace lengths to meet tight tolerances. A simple rule of thumb is: if trace length and wavelength are within the same order of magnitude, you should consider high-speed design.<\\\/div><\\\/li>
              3. Boards with wireless or antenna interfaces<\\\/strong>
                Every board that connects to an antenna, whether the antenna is on the board or attached by a connector, needs careful attention to high-speed and RF design. Vehicle antennas also need tight impedance control and tuned trace lengths. If you have SMA connectors or similar RF connectors, route them with controlled impedance to match the connector value.<\\\/div><\\\/li>
              4. Distributed systems and many subcircuits<\\\/strong>
                If your project is a distributed system made of many subcircuits that can operate independently inside a larger system, you will also likely face high-speed PCB challenges. Multiple modules, many high-speed links, and mixed timing domains raise the chance you need high-speed design care.<\\\/div><\\\/li><\\\/ol>

                5. High-speed Board Materials<\\\/h2>
                The term \\u201chigh-speed board material\\u201d is common in the industry. It usually means low-loss materials that are used for high-speed PCBs. These materials have a lower loss tangent, often called Df, compared with ordinary FR-4. What is Df and how does it affect signals?
                When an insulating medium like glass fiber cloth and resin sits in an electric field, the charged particles in the medium are bound inside molecules. The external field makes tiny displacements. Dipoles in the medium then align with the field. This effect is dielectric polarization. The energy lost during the polarization process is dielectric loss. The material Df value measures how much dielectric loss the material has.
                Standard board materials attenuate sine waves more than high-speed materials do. The effect is stronger at higher harmonic frequencies. Digital signals are made of many sine waves at different frequencies. If those sine waves are attenuated, the edges of the digital signal degrade and the amplitude falls. Edge degradation reduces the transmission line bandwidth and lowers signal margin. Using a high-speed material reduces loss per unit length. For the same trace length, a high-speed material gives higher bandwidth and more margin. Or, for the same loss budget, using high-speed material lets you route longer traces and still meet performance.
                A simple analogy may help. Imagine two cars with different fuel consumption. Car A uses 22 liters per 100 km (Df: 0.022). People call it a gas guzzler. Car B uses 4.5 liters per 100 km (Df: 0.0045). People call it a fuel saver. If you have only 50 liters of fuel and your destination is 800 km away, the gas guzzler will not reach it. The fuel saver will reach and still have fuel left. If the destination is only 200 km, the gas guzzler may reach with little fuel left, so the margin is small and the trip is risky if something goes wrong. The fuel saver handles the trip with better margin. This example shows why you sometimes need high-speed materials. When signal rates are high, trace lengths are long, or the loss budget is tight, normal material may not give enough margin. In such cases, we recommend high-speed material.
                High-speed materials come in graded levels based on Df. Df is only a guide. Always use the exact numbers from the material data sheet for design work.<\\\/div>

                5.1 Common Df Categories (values are typical references at 10 GHz)<\\\/h3>
                • Standard loss material: Df < 0.022 @ 10 GHz<\\\/li>
                • Mid loss material: Df < 0.012 @ 10 GHz<\\\/li>
                • Low loss material: Df < 0.008 @ 10 GHz<\\\/li>
                • Very low loss material: Df < 0.005 @ 10 GHz<\\\/li>
                • Ultra low loss material: Df < 0.003 @ 10 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