01
Simba Rudzi Rakaenderana
Dhijitari Dunhu rinowanzoda mafungu anokwana, saka mafungu anogadzirwa anogadzirwa kune mamwe madimikira akakwira.
Kana iyo Simba renje rurefu, iko kuvapo kwekunyura kwazvino kuchakonzera ruzha-nguva zhinji ruzha, uye ruzha rwechipiri rwevanhu ruchaunzwa mune zvimwe zvikwangwani. Mumatunhu ekumhanyisa, pachave nekukwira parasitic, kuparadzira paramisiki, saka kuvapo kwechimiro chekupedzisira, ichocho chinotungamira kuchidimbu chekurira kwechidimbu, icho chinogona kudzikisira dunhu.
Naizvozvo, zvakanyatsokosha kwazvo kuwedzera bypass capacitor pamberi peiyo digital mudziyo. Iyo yakakura kugona, iyo simba rekutapurika rinogumira nehuwandu hwekutapurirana, saka hombe yekugona uye kadiki kadiki kazhinji inowanzobatanidzwa kusangana neyakazara frequency.
Ngwarira nzvimbo dzinopisa: Signal vias inoburitsa voids paSimba Resimba uye Pasi Dayer. Naizvozvo, kusawirirana kusinganzwisisike kweVias kunogona kuwedzera density yazvino mune dzimwe nzvimbo dzekuwanikwa kwemagetsi kana nzvimbo yepasi. Idzi nzvimbo umo dentity yazvino inowedzera inonzi inopisa mavara.
Naizvozvo, isu tinofanira kuedza nepatinogona napo kuti tidzivise mamiriro aya pakumisa iyo Vias, kuitira kuti tirambe ndege kubva pakukamurwa, izvo zvinozotungamira kumatambudziko emam em.
Kazhinji nzira yakanakisa yekudzivirira nzvimbo dzinopisa ndeyokuisa zvisizvo
02
Nzira yekukotama yeiyo trace
Paunenge uchiisa mitsara yakakwirira-yekumhanyisa manhamba, dzivisa kukotama mitsara yemasangano zvakanyanya sezvinobvira. Kana iwe uchifanira kukotama trace, usazvisarudzira pane iyo acute kana kona chaiyo, asi asi shandisa angle.
Paunenge uchiisa mitsara yakakwirira-yekumhanyisa chiratidzo, tinowanzo shandisa mitsara yenyoka kuti tiwane urefu hwakaenzana. Iyo imwe yenyoka yenyoka mutsara ndeye mhando yekukotama. Iyo Line yakafara, kupatsanurana, uye nzira yekukotama inofanirwa kusarudzwa zvine musoro, uye kupatsanurwa kunofanira kusangana ne 4w / 1.5W kutonga.
03
Chiratidzo patsva
Kana chinhambwe pakati pemvura yakakwira-masaini emasaini iri padyo, zviri nyore kuburitsa crosstalk. Dzimwe nguva, nekuda kwekurongeka, bhodhi remuviri uye zvimwe zvikonzero, chinhambwe chepamusoro-simpt sign madiki anodiwa kure, saka isu tinogona kungowedzera kureba manhamba ekumhanya manhamba akawanda pedyo nebhodhoro. chinhambwe.
Muchokwadi, kana nzvimbo yacho ikakwanira, edza kuwedzera chinhambwe pakati pemitsara yemazwi maviri ekumhanya-mhanya mitsara.
03
Chiratidzo patsva
Kana chinhambwe pakati pemvura yakakwira-masaini emasaini iri padyo, zviri nyore kuburitsa crosstalk. Dzimwe nguva, nekuda kwekurongeka, bhodhi remuviri uye zvimwe zvikonzero, chinhambwe chepamusoro-simpt sign madiki anodiwa kure, saka isu tinogona kungowedzera kureba manhamba ekumhanya manhamba akawanda pedyo nebhodhoro. chinhambwe.
Muchokwadi, kana nzvimbo yacho ikakwanira, edza kuwedzera chinhambwe pakati pemitsara yemazwi maviri ekumhanya-mhanya mitsara.
05
Kutenderwa hakuenderere mberi
Iko kukosha kwekutadza kweiyo trace kazhinji kunoenderana nemutsara wayo upamhi uye chinhambwe pakati pekutevera uye ndege yenongedzo. Iyo yakabikwa chinongedzo, iyo yakadzika kutadza kwayo. Mune mamwe maTerface terminace uye mushambadzi mapads, nheyo yacho inoshandawo.
Kana iyo pad yeiyo interface terminace yakabatana neyekumhanya-spee Signal Sign Mune ino kesi, kusakwana kwekuregererwa kuchaitika, uye kuratidzira chiratidzo kuchaitika kana zvisina kukodzera kuderera.
Naizvozvo, kuitira kugadzirisa dambudziko iri, pepa redhorobha rakarambidzwa rakaiswa pasi pekatidziro yedare reInterface terminace terminace terminace.
Vias ndeimwe sosi yekutadza kuregedza. Kuti uderedze izvi mhedzisiro, iyo isina kukodzera ganda reganda rakabatana neyenzvimbo yemukati uye kuburikidza nekubviswa.
Muchokwadi, rudzi urwu rwekuvhiya runogona kubviswa nemidziyo yeCAD panguva yekugadzira kana kubata PCB yekugadzirisa mugadziri kubvisa iyo mhangura uye kuve nechokwadi chekuenderera mberi kwekusavimbika.
Vias ndeimwe sosi yekutadza kuregedza. Kuti uderedze izvi mhedzisiro, iyo isina kukodzera ganda reganda rakabatana neyenzvimbo yemukati uye kuburikidza nekubviswa.
Muchokwadi, rudzi urwu rwekuvhiya runogona kubviswa nemidziyo yeCAD panguva yekugadzira kana kubata PCB yekugadzirisa mugadziri kubvisa iyo mhangura uye kuve nechokwadi chekuenderera mberi kwekusavimbika.
Iyo inorambidzwa kuronga vias kana zvikamu mune iyo mimwe mbiri. Kana zvisizvo kana zvikamu zvikaiswa mune dzakasiyana mbiri, zvinetso zveEMC zvichaitika uye zvisina kufanira kusagadzikana zvinozoguma nei.
Dzimwe nguva, imwe yakakwira-yakakwira masaini masaini mitsetse inoda kubatana mune dzakateedzana nemasimba ane compling capacitors. Iyo coupling capacitor zvakare inodawo kurongedzwa symmetrically, uye package yeCoupling Capacitor haifanire kunge yakakura kwazvo. Inokurudzirwa kushandisa 0402, 0603 inogamuchirika, uye capacitors pamusoro 0805 kana padivi-ne-side capacitors haina kunaka kusashandiswa.
Usually, vias will produce huge impedance discontinuities, so for high-speed differential signal line pairs, try to reduce vias, and if you want to use vias, arrange them symmetrically.
07
Yakaenzana urefu
Mune imwe yakakwira-yekumhanyisa chiratidzo, kazhinji, senge bhazi, nguva yekusvika uye nguva yekukanganisa mapoinzi pakati pemitsetse yemasangano yemasangano inoda kutariswa. Semuenzaniso, muboka remabhazi akakwirira Kuti tisangane izvi zvinodiwa, isu tinofanirwa kufunga nezve huzhinji.
Iyo yakakwira-yekumhanyisa kusiyanisa chiratidzo chinofanira kuve nechokwadi chekunetseka nguva yeLag yeiyo miviri masaini masaini, zvikasadaro kutaurirana kunogona kuitika. Naizvozvo, kuitira kuti uite izvi zvinodiwa, mutsara wenyoka unogona kushandiswa kuzadzisa urefu hwakaenzana, nekudaro kusangana nenguva yekuda.
Iyo inyoka tambo inofanira kuiswa pane inobva kurasikirwa kwehurefu, kwete pakupedzisira. Pamusana chete pane masaini pane zvakanaka uye zvisina kunaka magumo emutsara wetsika abvumidzwe zvinowiriraniswa kazhinji yenguva.
Iyo inyoka tambo inofanira kuiswa pane inobva kurasikirwa kwehurefu, kwete pakupedzisira. Pamusana chete pane masaini pane zvakanaka uye zvisina kunaka magumo emutsara wetsika abvumidzwe zvinowiriraniswa kazhinji yenguva.
Kana paine miti miviri inokotama uye kureba pakati pezviviri zviri pasi pegumi neshanu, kurasikirwa kwehurefu pakati pevaviri panguva ino, saka hapana chikonzero chekugadzirisa zvakaenzana panguva ino.
Zvikamu zvakasiyana zvemitsara yakakwira yemasaini, vanofanira kunge vakaenzana kureba zvakazvimirira. Vias, Series Coupling Capacitors, uye interface terminace ndiyo yese yakakwira-yakakwira mutsauko masaini masaini
Inofanira kunge iri imwechete yakazaruka zvakasiyana. Nekuti yakawanda yeEda software inotarisa chete kuti ingave iyo wiring yose yarasika muDRC.
Zvekudyara senge lvds inoratidza zvishandiso, pachave nekaviri pane maviri maviri maviri panguva imwe chete, uye nguva dzekutonga pakati peizvozvo pane zvakajairika, uye nguva yekunonoka kunonoka inonyanya kuderera. Naizvozvo, kune maviri akasiyanisa masaga maviri, tinowanzoda kuti vave mumhepo imwe chete. Ita muripo. Nekuti chinomiririra chiratidzo chekusimudzira kwezvikamu zvakasiyana zvakasiyana.
Kana imwe software yeEma yakati yaverengera urefu hwechirevo, iyo trace mukati mePad ichaverengerwa mukati mehurefu. Kana iko kuripirwa kureba kunoitwa panguva ino, mhedzisiro chaiyo icharasikirwa nehurefu. Saka teerera zvakanyanya nguva ino panguva ino kana uchishandisa imwe software.
Chero nguva, kana uchikwanisa, iwe unofanirwa kusarudza symmetrical kufambisa kuti udzivise kukosha kwekupedzisira kuita inyoka yekufamba kwenguva yakareba.
Kana nzvimbo inobvumirwa, edza kuwedzera chidimbu chidiki pane sosi yemutsara wenguva pfupi kuti uwane muripo, pane kushandisa mutsara wenyoka kuti ubhadhare.