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, amadivayisi ahlobene kuphela nesekhethi yewashi endaweni yewashi le-PCB, gwema ukubeka amanye amasekhethi, futhi ungabeki eminye imigqa yesignali eduze noma ngaphansi kwekristalu: Ukusebenzisa indiza yaphansi ngaphansi kwesekhethi ekhiqiza iwashi noma ikristalu, uma amasignali adlula endizeni, ephula umsebenzi wendiza efakwe kumephu, uma isignali idlula endizeni yaphansi, kuzoba ne-loop encane yomhlabathi futhi kuthinte ukuqhubeka kwendiza yaphansi, futhi lezi zihibe zomhlaba zizodala 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 ngaphakathi 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 ye-loop ngaphakathi kwekristalu, ikhulula isikhashana samanje esikhiqizwa Imisebe ye-RF yezindlu ngokusebenzisa indiza yaphansi.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 ekuqineni 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, isendlalelo esingaphakathi singaqinisekisa indiza yesithombe esiphelele, singanikeza indlela yokudlulisa ye-RF enezithiyo eziphansi, futhi sikhiqize ukuguquguquka kazibuthe ukuze kuncishiswe ukugeleza kazibuthe kolayini wabo wokudlulisa umthombo, ukusondela kwebanga phakathi komthombo nendlela yokubuya, kungcono ukuhlanza.Ngenxa ye-demagnetization ethuthukisiwe, ungqimba ngalunye lwesithombe oluphelele lwe-PCB enokuminyana okuphezulu lunikeza ukucindezelwa okungu-6-8dB.
I-3, izinzuzo zebhodi lezingqimba eziningi: kukhona ungqimba noma izendlalelo eziningi ezinganikezelwa ekunikezeni amandla okuphelele kanye nendiza yomhlabathi, ingaklanywa ibe uhlelo oluhle lokuhlukanisa, ukunciphisa indawo ye-loop yomhlabathi, ukunciphisa imodi yokuhlukanisa. imisebe, ukunciphisa i-EMI, ukunciphisa izinga le-impedance yesiginali kanye nendlela yokubuya kwamandla, ingagcina ukuhambisana kwayo yonke i-impedance yomugqa, inciphise i-crosstalk phakathi kwemigqa eseduze.
Isikhathi sokuthumela: Jul-05-2023
