Ekwakhiweni kwe-PCB, isakhiwo sidlala indima eyengeziwe kukho konke ukuklama kanye nokusetshenziswa komkhiqizo.Sonke isinyathelo sokuklama sidinga ukunakekelwa okuvelele nokucatshangelwa ukuze kuzuzwe ukusebenza okuhle.
Izintambo ze-engeli yesokudla ngokuvamile ziyisimo esidinga ukugwenywa ngangokunokwenzeka ezintamboni ze-PCB, futhi sekucishe kube ngesinye sezindinganiso zokukala ikhwalithi yezintambo.Ngakho-ke izintambo ze-engeli elungile zinomthelela ongakanani ekudluliselweni kwesignali?
Okwesibili, amanani ahlukile ngenxa yezinqubo ezahlukene zokukhiqiza.
Izinqubo ezahlukene zokukhiqiza ziholela ezindlekweni ezahlukene.Okufana nebhodi eligqize ngegolide kanye nebhodi elifakwe ngothayela, ukuma kwendlela yokuqondisa nokushaya, ukusetshenziswa kwemigqa yesikrini sikasilika kanye nemigqa yefilimu eyomile kuzokwakha izindleko ezihlukene, okuholela ekuhlukeni kwamanani.
Empeleni, ukulandelelwa kwe-engeli yesokudla kuzoshintsha ububanzi bomugqa wokudlulisela, okuholela ekunqanyulweni kokuphazamiseka.Eqinisweni, akukhona nje ukulandelelwa kwe-engeli elungile, kodwa futhi ukulandelelwa kwe-engeli ebukhali kungase kubangele izinguquko ze-impedance.
Umthelela wokulandela i-engeli yesokudla esignali ubonakala ngokuyinhloko ezicini ezintathu: okokuqala, ikona lingalingana nomthwalo we-capacitive kulayini wokudlulisa, ukunciphisa isikhathi sokukhuphuka;okwesibili, ukungaqhubeki kwe-impedance kuzodala ukubonakaliswa kwesignali;
Eyesithathu i-EMI ekhiqizwa ithiphu ye-engeli engakwesokudla.Amandla e-parasitic abangelwa i-engeli engakwesokudla yolayini wokudlulisela angabalwa ngefomula yokuhlola elandelayo: C=61W (Er) 1/2/Z0 Kufomula engenhla, u-C ubhekisela kumandla alinganayo ekhona ( Iyunithi: pF),
U-W ubhekisela kububanzi be-trace (iyunithi: intshi), u-εr ubhekisela kokungaguquki kwe-dielectric ye-medium, futhi u-Z0 iwukuvimbeka kwesici komugqa wokudlulisela.
Njengoba ububanzi bomugqa wokulandela umkhondo we-engeli yesokudla bukhula, i-impedance lapho izoncishiswa, ngakho-ke into ethile yokubonisa isignali izokwenzeka.Singakwazi ukubala i-impedance efanayo ngemva kokuba ububanzi bomugqa bunyusiwe ngokuya ngefomula yokubala ye-impedance eshiwo esahlukweni somugqa wokudlulisela.
Bese ubala i-coefficient yokubonisa ngokuya ngefomula ye-empirical: ρ=(Zs-Z0)/(Zs+Z0).Ngokuvamile, uguquko lwe-impedance olubangelwa izintambo ze-engeli yesokudla luphakathi kuka-7% no-20%, ngakho-ke i-reflection coefficient ephezulu ingaba ngu-0.1.I-Shenzhen ANKE PCB Co., LTD
Isikhathi sokuthumela: Jun-25-2022
