Qaphela okulandelayo okucatshangelwayo kwewashi ebhodini:
1. Isakhiwo
a, ikristalu yewashi namasekhethi ahlobene kufanele ahlelwe endaweni emaphakathi ye-PCB futhi abe nokwakheka okuhle, kunokuba asondele ku-interface ye-I/O. Isekhethi yokukhiqiza iwashi ayikwazi ukwenziwa ikhadi lendodakazi noma ifomu lebhodi lendodakazi, kufanele lenziwe ebhodini lewashi elihlukile noma ebhodini lomthwali.
Njengoba kuboniswe emfanekisweni olandelayo, ibhokisi eliluhlaza ingxenye yesendlalelo esilandelayo kuhle ukuthi ungahambi umugqa
b, kuphela amadivaysi ahlobene nesekhethi yewashi endaweni yewashi le-PCB, gwema ukubeka ezinye izifunda, futhi ungabeki eminye imigqa yesignali eduze noma ngaphansi kwekristalu: Ukusebenzisa indiza yaphansi ngaphansi kwesekethe ekhiqiza iwashi noma ikristalu, uma ezinye izimpawu zidlula endizeni, ephula umsebenzi wendiza emephu, uma isignali yendiza idlula endizeni encane yomhlabathi, kuzoba ne-loop encane yomhlabathi futhi kuthinte i-loop encane yomhlabathi ama-loops azodala izinkinga kumafrikhwensi aphezulu.
c. Kumakristalu ewashi neziyingi zewashi, izindlela zokuvikela zingathathwa ukuze kucutshungulwe ukuvikela;
d, uma igobolondo lewashi liyinsimbi, umklamo we-PCB kufanele ubekwe ngaphansi kwe-crystal yethusi, futhi uqinisekise ukuthi le ngxenye kanye nendiza ephansi egcwele inokuxhumana okuhle kukagesi (ngokusebenzisa umhlabathi onama-porous).
Izinzuzo zokugandaya ngaphansi kwamakristalu wewashi:
Isekhethi engaphakathi kwe-crystal oscillator ikhiqiza i-RF yamanje, futhi uma ikristalu ivalelwe endlini yensimbi, iphinikhodi yamandla e-DC iwukuthembela kwereferensi kagesi kagesi we-DC kanye nereferensi ye-RF yamanje eyiluphu ngaphakathi kwekristalu, ikhulula isikhashana samanje esikhiqizwa imisebe ye-RF yendlu ngendiza ephansi. Ngamafuphi, igobolondo lensimbi liwuthi olunesiphetho esisodwa, futhi ungqimba lwesithombe oluseduze, ungqimba lwendiza ephansi futhi ngezinye izikhathi izendlalelo ezimbili noma ngaphezulu zanele ukuhlanganisa imisebe yamanje ye-RF phansi. I-crystal floor nayo ilungele ukuqeda ukushisa. Isekhethi yewashi kanye ne-crystal underlay kuzohlinzeka ngendiza yokwenza imephu, enganciphisa imodi evamile yamanje ekhiqizwa i-crystal ehambisanayo nesekhethi yewashi, ngaleyo ndlela yehlise imisebe ye-RF. Indiza yaphansi futhi idonsa imodi yokuhlukanisa i-RF yamanje. Le ndiza kufanele ixhunywe endizeni yaphansi ephelele ngamaphoyinti amaningi futhi idinga izimbobo eziningi, ezinganikeza ukuvimba okuphansi. Ukuze kuthuthukiswe umphumela wale ndiza ephansi, isifunda sejeneretha yewashi kufanele sibe seduze nale ndiza ephansi.
Amakristalu e-Smt-packaged azoba nemisebe yamandla e-RF engeziwe kunamakristalu agqoke insimbi: Ngenxa yokuthi amakristalu abekwe phezulu ngokuvamile amaphakheji epulasitiki, i-RF yamanje engaphakathi kwekristalu izokhanya esikhaleni futhi ihlanganiswe namanye amadivayisi.
1. Yabelana ngomzila wewashi
Kungcono ukuxhuma isignali yonqenqema ekhuphuka ngokushesha kanye nesignali yensimbi ene-radial topology kunokuxhuma inethiwekhi ngomthombo owodwa womshayeli ovamile, futhi umzila ngamunye kufanele uhanjiswe ngokunqamula izinyathelo ngokuya ngokuvinjelwa kwesici sawo.
2, izidingo zomugqa wokudlulisa iwashi kanye nokubekwa kwe-PCB
Umgomo womzila wewashi: Hlela isendlalelo sendiza yesithombe esiphelele endaweni eseduze nesendlalelo somzila wewashi, wehlise ubude bomugqa futhi ulawule i-impedance.
Izintambo ezingalungile ze-cross-layer nokungahambisani kahle kwe-impedance kungaholela kokuthi:
1) Ukusetshenziswa kwezimbobo kanye nokweqa ku-wiring kuholela ekupheleleni kwe-loop yesithombe;
2) I-voltage ekhuphuka endizeni yesithombe ngenxa ye-voltage ephinikhodi yesignali yedivayisi iyashintsha ngokushintsha kwesignali;
3), uma ulayini ungacabangi umgomo we-3W, amasiginali ewashi ahlukene azodala i-crosstalk;
Izintambo zesignali yewashi
1, umugqa wewashi kufanele uhambe engxenyeni engaphakathi yebhodi le-PCB elinezingqimba eziningi. Futhi qiniseka ukuthi ulandela umugqa weribhoni; Uma ufuna ukuhamba kungqimba olungaphandle, umugqa we-microstrip kuphela.
2, ungqimba lwangaphakathi lungaqinisekisa indiza yesithombe esiphelele, inganikeza indlela yokudlulisa ye-RF enezithiyo eziphansi, futhi ikhiqize i-flux kazibuthe ukuze isuse ukugeleza kazibuthe kolayini wabo wokudlulisela womthombo, lapho ibanga eliseduze phakathi komthombo nendlela yokubuya, kungcono ukukhumuzeka kwe-degaussing. Ngenxa ye-demagnetization ethuthukisiwe, ungqimba ngalunye lwesithombe olugcwele olugcwele lwe-PCB enokuminyana okuphezulu lunikeza ukucindezelwa okungu-6-8dB.
I-3, izinzuzo zebhodi elinezingqimba eziningi: kukhona ungqimba noma izendlalelo eziningi ezinganikezelwa ekunikezeni amandla okuphelele kanye nendiza yaphansi, ingaklanywa ibe uhlelo oluhle lokuhlukanisa, ukunciphisa indawo ye-loop yomhlabathi, ukunciphisa imisebe yemodi yokuhlukanisa, ukunciphisa i-EMI, ukunciphisa izinga lokuvimbela isignali kanye nendlela yokubuya kwamandla, ingagcina ukuvumelana kwawo wonke umugqa wokuphambana phakathi komugqa, unciphise umugqa wokuphambana.
Isikhathi sokuthumela: Jul-05-2023
