Ukukhethwa kweBobhodi yePCB kumele kushaye ibhalansi phakathi kwezidingo zokwakhiwa kwemihlangano nokukhiqizwa kwesisindo nezindleko. Izidingo zokuklama zifaka izingxenye zikagesi nezemishini. Le nkinga ezibonakalayo imvamisa ibaluleke kakhulu lapho uklama amabhodi we-PCB aphezulu kakhulu (imvamisa enkulu kune-GHz).
Isibonelo, izinto ezisetshenziswa kakhulu ze-FR-4 manje zinokulahleka kwe-dielectric imvamisa ye-GHZ embalwa, enethonya elikhulu ekungeneni kwesiginali, futhi kungenzeka lingafanele. Ngokuqondene nogesi ukhathazekile, nakekela ukuthi ngabe ukulahlekelwa kwe-dielectric njalo kanye nokudla kwe-dielectric kulungele imvamisa eklanyelwe.2. Ungakugwema Kanjani Ukuphazanyiswa Okuphezulu Okuphezulu?
Umqondo oyisisekelo wokugwema ukuphazamiseka okuthe xaxa ukunciphisa ukuphazanyiswa kwenkambu ye-electromagnetic yamasiginali afudumele aphezulu, okuyi-crosstalk (crosstalk). Ungakhuphula ibanga phakathi kwesiginali esisheshayo nesiginali ye-analog, noma engeza umgadli womqaphi we-analog / we-shunt eduze kwesiginali ye-analog. Naka futhi ukunaka umsindo ukuphazamiseka kusuka endaweni yedijithali kuya emhlabathini we-analog.3. Ungayixazulula kanjani inkinga yokuthembeka yesiginali ekwakhiweni okusheshayo?
Ubuqotho besiginali ngokuyisisekelo buyinkinga yokufanisa kwe-Impodance. Izici ezithinta ukufana kwe-Impodenance zibandakanya ukwakheka kanye nokukhishwa komthombo wesiginali, ukungcola okusobala kokulandela umkhondo, izici zomkhawulo womthwalo, kanye ne-topology yomlandeli. Isixazululo ukuncika kwi-topology yokuqedwa kanye nokulungiswa kwe-wiring.
4. Itholwa kanjani indlela ehlukile ye-wiring?
Kunamaphuzu amabili okufanele anake ekwakhekeni kwe-pair ehlukile. Eyokuqala ukuthi ubude bezintambo ezimbili kufanele bube yinde ngangokunokwenzeka, kanti enye ngukuthi ibanga phakathi kwezintambo ezimbili (leli banga linqunywa ngokuphazamiseka okuhlukile) kumele ligcinwe lihlale njalo, okungukuthi, ukuqhubeka kufana. Kunezindlela ezimbili ezifanayo, munye ukuthi imigqa emibili egijima ohlangothini olufanayo-eceleni, kanti enye ukuthi imigqa emibili isebenza ezingxenyeni ezimbili eziseduze (ezingaphansi). Ngokuvamile, owayekade eceleni - eceleni (eceleni-eceleni, uhlangothi-eceleni) kusetshenziswa ngezindlela eziningi.
I-5. Ungakuthola Kanjani I-Wiring Ehlukile Yomugqa Wesiginali Wewashi Nge-terminal eyodwa kuphela yokukhipha?
Ukuze usebenzise i-Wiring Wiring, kunengqondo ukuthi umthombo wesiginali nosomephuli nabo bahlukene amasiginali. Ngakho-ke, akunakwenzeka ukusebenzisa i-wiring wiring ye-Clock Signal nge-terminal eyodwa yokukhipha.
6. Ingabe ukumelana nokuqhathanisa kungangezwa phakathi kwamabili ohlukile ngakolunye uhlangothi lokuthola?
Ukumelana okufanayo phakathi kwamabili ahlukene ngomugqa endaweni yokuthola okutholakalayo kuvame ukungezwa, futhi inani lawo kufanele lilingane nenani lokuvikelwa okuhlukile. Ngale ndlela ikhwalithi yesiginali izoba ngcono.
7. Kungani izintambo ze-wiring ze-pair ehlukile zisondele futhi zifane?
I-wiring of the pair ehlukile kufanele ivalwe ngokufanele futhi ihambisane. Ukubizwa okubizwa ngokuthi kufanelekile yingoba ibanga lizothinta inani lokungafani, okuyi-parameter ebalulekile yokwakha ngababili abahlukile. Isidingo sokufana futhi ukuze silondoloze ukuvumelana kokuphazamiseka okuhlukile. Uma imigqa emibili ide kakhulu futhi isondele, ukulimala okuhlukile kuzobe kungahambisani, okuzothinta ubuqotho besiginali nokubambezeleka kwesikhathi.
