Kuyilo lwe Ibhodi PCB, kunye nokwanda ngokukhawuleza kwamaxesha, kuya kubakho ukuphazamiseka okuninzi okwahlukileyo kuyilo lwebhodi ye-PCB esezantsi. Kukho imiba emine yokuphazamiseka, kubandakanya ingxolo yombane, ukuphazamiseka komgca wokuhambisa, ukudibanisa nokuphazamiseka kwe-electromagnetic (EMI).

Ukusombulula njani uphazamiseko loyilo oluphezulu lwePCB

Kukho iindlela ezininzi zokuphelisa ingxolo yombane kuyilo lwePCB

1. Nika ingqalelo emngxunyeni ebhodini: umngxuma owenza ukuba umaleko wombane wenze isitshixo sokuvula indawo yokushiya umngxuma ophume kuwo. Ukuba ukuvulwa kwesithuba sokuhambisa umbane kukhulu kakhulu, kuyanyanzeleka ukuba kuchaphazele loop yomqondiso, umqondiso uyanyanzelwa ukuba udlule, indawo yeluphu iyanda, nengxolo inyuka. Kwangelo xesha, ukuba imigca eliqela yomqondiso idityanisiwe kufutshane nokuvula kwaye yabelana ngomtya ofanayo, impedance eqhelekileyo iya kubangela i-crosstalk. Jonga umzobo 2.

Ukusombulula njani ukuphazamiseka koyilo lwePCB ephezulu?

2. Umgca wokudibanisa ufuna umhlaba owoneleyo: uphawu ngalunye kufuneka lube nendawo yalo enophawu lwentengiso, kwaye indawo yeluphu yesiginali kunye neluphu incinci kangangoko, oko kukuthi, umqondiso kunye neluphu kufuneka zihambelane.

3. amandla e-analog kunye nedijithali ukwahlula: izixhobo ezinamaza aphezulu zihlala zibuthathaka kwingxolo yedijithali, ke ezi zimbini kufuneka zahlulwe, zidityaniswe kunye ekungeneni kombane, ukuba ngaba umqondiso kwi-analog nakwiindawo zedijithali ze amagama, ungabeka iluphu ngapha komqondiso ukunciphisa indawo yeluphu. Ubungakanani be-digital-analog busetyenziselwa ilogo yomqondiso.

Ukusombulula njani uphazamiseko loyilo oluphezulu lwePCB

4. Kunqande ukugqagqana kwamandla ombane ohlukeneyo phakathi kwamanqanaba ahlukeneyo: ngapha koko, ingxolo yesekethe inokudlula ngokulula kwi-coupling capacitive coupling.

5. ukubekwa ecaleni kwezinto ezibuthathaka: ezinje ngePLL.

6. Beka umgca wamandla: Ukunciphisa i-loop yomqondiso, beka umgca wamandla kumda womgca wesiginali ukunciphisa ingxolo.

Ukusombulula njani ukuphazamiseka koyilo lwePCB ephezulu?

Ii. Iindlela zokuphelisa umgca wokuhambisa ukuphazamiseka kuyilo lwe-PCB zezi zilandelayo:

(a) Kulumkele ukuyekiswa komzila wokuhambisa ngokungxamisekileyo. Inqaku lokuyekiswa kwe-impedance yindawo yokuhambisa utshintsho kumgca, njengokungena ngqo kwikona, ngomngxunya, njl. Njl., Kufuneka kuthintelwe kangangoko kunokwenzeka. Iindlela: Ukuthintela iikona ezichanekileyo zomgca, ukuya kuthi ga kwi-45 ° i-Angle okanye i-arc, i-Angle enkulu inokuba nayo; Sebenzisa njengezimbalwa kwimingxunya ngokusemandleni, kuba nganye ngembobo kukuphelisa ukungasebenzi. Iimpawu ezivela kumaleko angaphandle zithintela ukugqitha kulwahlulo lwangaphakathi kunye nokunye.

Ukusombulula njani ukuphazamiseka koyilo lwePCB oluphezulu？

(b) Sukusebenzisa imigca yezibonda. Kuba nayiphi na ingqumba yomnatha ingumthombo wengxolo. Ukuba umgca we-pile mfutshane, unokudibaniswa ekupheleni komgca wokuhambisa; Ukuba umgca we-pile mde, uya kuthatha umgca wokuhambisa ophambili njengomthombo kwaye uvelise ukubonakaliswa okukhulu, okuya kwenza ingxaki kube nzima. Kuyacetyiswa ukuba ungayisebenzisi.

3. Zininzi iindlela zokuphelisa i-crosstalk kuyilo lwe-PCB

1. Ubungakanani beentlobo ezimbini ze-crosstalk ziyanda ngokunyuka kwe-impedance yomthwalo, ke umgca womqondiso onovakalelo kuphazamiseko olubangelwa yi-crosstalk kufuneka unqunyanyiswe ngokufanelekileyo.

2, kangangoko kunokwenzeka ukwandisa umgama phakathi kwemigca yesiginali, unokunciphisa ngokufanelekileyo i-capacitive crosstalk. Ulawulo lomhlaba, isithuba phakathi kweentambo (ezinje ngemigca yesiginali esebenzayo kunye nemigca yomhlaba yokuzihlukanisa, ngakumbi kwimeko yokutsiba phakathi komgca wesiginali kunye nomhlaba ukuya kwisithuba) kunye nokunciphisa ukungafakwanga.

3. I-crosstalk eyi-Capacitive nayo ingancitshiswa ngokufanelekileyo ngokufaka ucingo lomhlaba phakathi kwemigca yeempawu ezimeleneyo, ekufuneka inxulunyaniswe nokwakheka kwikota nganye yamaza.

4. Nge-crosstalk esengqiqweni, indawo yeluphu kufuneka incitshiswe kwaye, ukuba kuvunyelwe, iluphu isuswe.

5. Kuphephe ukwabelana ngamagwegwe.

6, nikela ingqalelo kwingqibelelo yomqondiso: umyili kufuneka aqonde ukuphela konxibelelwano kwinkqubo ye-welding ukusombulula ingqibelelo yomqondiso. Abaqulunqi basebenzisa le ndlela banokujonga kubude be-microstrip yesikhuselo sobhedu esikhuselayo ukuze bafumane ukusebenza kakuhle kokuthembeka komqondiso. Kwiinkqubo ezinezihlanganisi ezixineneyo kulwakhiwo lonxibelelwano, umyili unokusebenzisa i-PCB njengesiphelo sendlela.

4. Zininzi iindlela zokuphelisa ukuphazamiseka kombane kuyilo lwePCB

1. Nciphisa iziporo: iluphu nganye ilingana ne-eriyali, kungoko kufuneka sinciphise inani leziporo, indawo yeziporo kunye nempembelelo ye-eriyali. Qinisekisa ukuba umqondiso unendlela enye yokujikeleza kulo naliphi na inqaku ezimbini, thintela ii-loops ezingezizo kwaye usebenzise umaleko wamandla xa kunokwenzeka.

2, ukuhluza: kumgca wamandla kunye nomgca womqondiso kungathatha ukuhluza ukunciphisa i-EMI, kukho iindlela ezintathu: ukucoca i-capacitor, isihlungi se-EMI, izinto ezinamandla. Isihluzo se-EMI sibonisiwe kwi.

Ukusombulula njani ukuphazamiseka koyilo lwePCB oluphezulu？

3, ukukhusela. Ngenxa yobude bomcimbi kunye nenqaku elininzi leengxoxo ezikhuselayo, akusekho kwaziswa ngqo.

4, zama ukunciphisa isantya kwizixhobo ezihamba rhoqo.

I-5, yandisa i-dielectric engagungqiyo yebhodi ye-PCB, inokuthintela iindawo ezihamba rhoqo ezinje ngomgca wokuhambisa kufutshane nebhodi ekutshiseni ngaphandle; Yandisa Ebubanzini ibhodi PCB, ukunciphisa Ebubanzini line microstrip, unako ukuthintela umgca electromagnetic spillover, nako ukuthintela radiation.