Si loo hubiyo tayada gudbinta calaamadaha, la yareeyo faragelinta EMI, oo aad gudubto shahaadada tijaabada impedance, PCB Naqshadaynta is-waafajinta calaamadda muhiimka ah ayaa loo baahan yahay. Hagahan nakhshaduhu wuxuu ku salaysan yahay cabbirrada xisaabinta caadiga ah, sifooyinka calaamadaha alaabta TV-ga, shuruudaha Layout PCB, xisaabinta software SI9000, macluumaadka jawaab celinta alaab-qeybiyaha PCB iyo wixii la mid ah, oo ugu dambeyntii u imaado naqshadeynta lagu taliyey. Ku habboon inta badan heerarka geeddi-socodka alaab-qeybiyeyaasha PCB iyo naqshadaha guddiga PCB ee leh shuruudaha xakamaynta cilladaha.

Mid. Naqshadaynta impedance panel double

① Naqshadaynta dhulka: ballac xariiqda, kala dheeraynta 7/5/7mil ballac silig dhulka ≥20mil signal iyo masaafada siliga dhulka 6mil, dalool kasta oo 400mil ah; (2) Naqshad aan baqshad lahayn: ballac xariiqda, kala dheeraynta 10/5/10mil farqiga u dhexeeya labada lamaane gaashaan, calaamad ka duwan iyo fogaanta dhulka ≥20mil (xaaladaha gaarka ah kama yaraan karaan 10mil). 90 ohm impedance kala duwan ayaa lagu taliyay naqshadeynta

Balaadhka laynka, kala dheeraynta 10/5/10mil Balaadhka siliga dhulka ≥20mil Signal iyo fogaanta siliga dhulka ee 6mil ama 5mil, daloolka dhulka 400mil kasta; ②Ha ku darin naqshadda:

Ballaca xariiqda iyo kala dheeraynta 16/5/16mil masaafada u dhaxaysa labada calaamad ee kala duwan ≥20mil waxa lagu talinayaa in baqshadda dhulka loo isticmaalo kooxda oo dhan ee fiilooyinka calaamadaha kala duwan. Masaafada u dhaxaysa calaamada kala duwanaanta iyo fiilada dhulka ee gaashaanka leh waa inay ahaataa ≥35mil (ama ≥20mil xaalado gaar ah). Qodobbada ugu muhiimsan: mudnaanta siiya isticmaalka naqshadeynta dhulka daboolan, xariiq gaaban iyo diyaarad dhamaystiran ayaa la isticmaali karaa iyada oo aan la daboolin naqshad dhulka ah; Qiyaasaha xisaabinta: Saxanka FR-4, dhumucda saxanka 1.6mm +/- 10%, saxan dielectric joogto ah 4.4+/-0.2, dhumucdiisuna waxay tahay 1.0 oz (1.4mil) dhumucdiisuna saliid alxanka 0.6 ± 0.2mil, dielectric joogto ah 3.5+/-0.3.

Naqshadaynta impedance ee laba iyo afar lakab

100 ohm kala duwanaanshaha impedance ayaa lagu taliyay ballac naqshadaynta iyo kala dheeraynta 5/7/5mil masaafada u dhaxaysa lamaanaha Masaafada u dhaxaysa calaamada kala duwanaanta iyo fiilada dhulka gaashaammadu waa inay ahaataa ugu yaraan 14mil (aan ka yarayn 3mil xaalado gaar ah). 90ohm kala duwanaanshaha impedance Lagu taliyay ballac iyo kala dheeraynta khadka naqshadaynta 6/6/6mil Masaafada kala duwan ee lammaanaha dhulka ku duub 12mil si aad u yarayso khatarta EMI (gud dhulka oo ha duubin dhulka, ballaca xariiqda iyo heerka masaafada xariiqdu waa joogto). Qiyaasaha xisaabinta: Fr-4, dhumucdiisuna waxay tahay 1.6mm+/- 10%, saxan dielectric joogto ah 4.4+/-0.2 -1.0 dhumucdiisuna waxay tahay 1.4 ± 2116mil, Dielectric joogto ah 3.5+/- 0.3 qaab dhismeedka laminated: shaashadda daabacaadda lakabka alxanka lakabka copper lakabka semi-daaweeyay filimka dahaarka naxaas substrate semi-daaweeyay filimka naxaasta lakabka alxanka daabacaadda screen

Saddex. Naqshadaynta impedance board lix lakab

Qaab dhismeedka lix-lakab ee lamination wuu ka duwan yahay waqtiyo kala duwan. Hagahan ayaa kaliya ku talinaya naqshadeynta lamination-ka caadiga ah (fiiri FIG. 2), iyo naqshadaha soo socda ee lagu taliyey waxay ku saleysan yihiin xogta laga helay hoostiisa sawirka FIG. 2. Naqshadeynta impedance ee lakabka dibadda waxay la mid tahay kan guddiga afarta lakab. Sababtoo ah lakabka gudaha guud ahaan wuxuu leeyahay lakabyo diyaaradeed oo ka badan lakabka dusha sare, deegaanka elektromagnetic waa ka duwan yahay lakabka dusha sare. Kuwa soo socda waa talooyinka xakamaynta impedance ee lakabka saddexaad ee fiilooyinka (Tixraaca tixraaca Jaantuska 4). 90 ohm kala soocida impedance Lagu taliyay ballac naqshadaynta, masaafada xariiqda 8/10/8mil Fogaanta lamaanaha kala duwanaanshaha ≥20mil(3W heerka); Qiyaasaha xisaabinta: Fr-4, dhumucdiisuna waxay tahay 1.6mm+/- 10%, saxan dielectric joogto ah 4.4+/-0.2 -1.0 dhumucdiisuna waxay tahay 1.4 ± 2116mil, Dielectric joogto ah 3.5+/- 0.3 qaab-dhismeed dahaaran: shaashadda sare xannibidda lakabka naxaasta lakabka naxaasta-daaweeyay substrate Semi-daaweeyay naxaas-daaweeyay lakabka hoose ee daboolka shaashadda

In ka badan afar ama lix lakab, fadlan naftaadu u naqshadayso si waafaqsan xeerarka khuseeya ama la tasho shaqaalaha ku habboon si aad u go’aamiso qaabka lamination iyo nidaamka fiilooyinka.

5. Haddii ay jiraan shuruudo kale oo xakamaynta xannibaadda oo ay sabab u tahay duruufo gaar ah, fadlan adigu xisaabi ama la tasho shaqaalaha ku habboon si loo go’aamiyo nidaamka naqshadaynta

Xusuusin: ① Waxaa jira kiisas badan oo saameeya xannibaadda. Haddii PCB u baahan yahay in lagu xakameeyo impedance, shuruudaha xakamaynta impedance waa in si cad loogu calaamadiyaa xogta naqshadaynta PCB ama xaashida muunada; (2) 100 ohm kala duwanaansho ah ayaa inta badan loo isticmaalaa HDMI iyo calaamadaha LVDS, taas oo HDMI u baahan tahay inay ku gudubto shahaadada la xiriirta waa qasab; ③ 90 ohm is-hortaagga kala duwan ayaa inta badan loo adeegsadaa calaamadda USB; (4) Hal-terminal 50 ohm impedance waxaa inta badan loo isticmaalaa qayb ka mid ah calaamada DDR. Maadaama inta badan qaybaha DDR ay qaataan isku-habeynta gudaha ee u dhigma naqshadeynta impedance, naqshaddu waxay ku saleysan tahay guddiga Demo ee ay bixiso shirkadda xalinta tixraac ahaan, iyo hagaha naqshadeynta laguma talinayo. ⑤, hal-dhamaadka 75-ohm impedance ayaa inta badan loo isticmaalaa soo-gelinta fiidyowga analoogga ah. Waxaa jira iska caabin 75-ohm ah oo u dhigma iska caabbinta dhulka ee naqshadeynta wareegga, markaa muhiim ma aha in la sameeyo naqshadaynta isku-dhafka ah ee PCB Layout, laakiin waa in la ogaadaa in 75-ohm caabbinta dhulka ee khadka waa in la dhigaa meel u dhow. ilaa pin-terminalka. Sida caadiga ah loo isticmaalo PP.