1. Yiziphi izici okufanele ibhodi yesekethe i-debug iqale kusuka?
Ngokuqondene nemibuthano yedijithali, okokuqala thola izinto ezintathu ngokulandelana:
1) Qinisekisa ukuthi wonke amanani anamandla ahlangabezana nezidingo zokuklama. Ezinye izinhlelo ezinamandla amaningi wamandla angadinga ukucaciswa okuthile kwe-oda nejubane lamandla okunikezwa kwamandla.
2) Qinisekisa ukuthi yonke imvamisa yesiginali yewashi isebenza kahle futhi azikho izinkinga ezingezona ze-monotonic emaphethelweni wesiginali.
3) Qinisekisa ukuthi isinali yokusetha kabusha ihlangabezana nezidingo zokucaciswa.
Uma lokhu kujwayelekile, i-chip kufanele ithumele isiginali yokuqala (umjikelezo). Okulandelayo, iphutha ngokuya ngomgomo wokusebenza wohlelo kanye nephrothokholi yebhasi.
2. Endabeni yosayizi webhodi lokujikeleza okulungisiwe, uma imisebenzi eminingi idinga ukutholwa ekwakhiweni, kepha lokhu kungakhuphula ukuphazanyiswa kwe-PCB, kodwa ukubulawa kwezethule kakhulu, sicela uthumele amakhono ngejubane eliphezulu (> 100mhz) design ephezulu ye-PCB?
Lapho uklama i-PCBS enesivinini esiphakeme kanye ne-Pensity ephezulu, ukuphazamiseka kweCrostalk (Crostalk) kudinga ukunakwa okukhethekile, ngoba kunomthelela omkhulu ngesikhathi nobuqotho besiginali. Nawa amaphuzu ambalwa okufanele uqaphele:
1) Lawula ukuqhubeka nokuqhathaniswa kwesimo sokuvikelwa kwe-wiring.
Usayizi we-trace sppecing. Ngokuvamile kubonakale ukuthi isikhala se-spacesing siwububanzi obukhulu. Kungenzeka ukwazi ithonya lokulandela umkhondo ngesikhala ngesikhathi kanye nobuqotho besiginali ngokusebenzisa ukumbumbuluzwa, futhi uthole izikhala zokubekezelela ezingabekezeleleki. Umphumela wezimpawu ezihlukile ze-CHIP zingahluka.
2) Khetha indlela efanele yokuqedwa.
Gwema izingqimba ezimbili eziseduze nendlela efanayo yokuhlobisa, noma ngabe kukhona izintambo ezigcwele omunye komunye, ngoba lolu hlobo lwe-crosstalk lukhulu kunalolo oluseduze kwe-wiring engxenyeni efanayo.
Sebenzisa ama-vivied / angcwatshwe vias ukwandisa indawo yokulandela umkhondo. Kepha izindleko zokukhiqiza zebhodi le-PCB zizokwanda. Kunzima ngempela ukufeza ukufana okuphelele nobude obulinganayo ekusetshenzisweni kwangempela, kepha kusadingeka ukwenza kanjalo.
Ngaphezu kwalokho, ukunqanyulwa okuhlukile kanye nokuqedwa kwemodi ejwayelekile kungagcinelwa ukunciphisa umthelela ngesikhathi nobuqotho besiginali.
I-3. Ukuhlunga ku-Analog Power Supply kuvame ukusebenzisa umjikelezo we-LC. Kepha kungani umphumela wokuhlunga we-LC mubi kune-RC ngesinye isikhathi?
Ukuqhathaniswa kwemiphumela yokuhlunga ye-LC kanye ne-RC kufanele kucatshangelwe ukuthi ngabe i-Frequency band kufanele ihlungwe futhi ukhetho lokuqanjwa kufanelekile. Ngoba ukudonswa kwe-inductor (ukuphendula) kuhlobene nenani le-intanethi kanye nemvamisa. Uma imvamisa yomsindo wokuhlinzekwa kwamandla iphansi, futhi inani le-inductance alilikhulu ngokwanele, umphumela wokuhlunga kungenzeka ungabi kahle njenge-RC.
Kodwa-ke, izindleko zokusebenzisa ukuhlunga kwe-RC ukuthi i-Resistor ngokwayo isebenzisa amandla futhi inokusebenza kahle, futhi inake amandla okumelana okukhethiwe ongakwazi ukumelana nawo.
