Yakakwira-mhanyisa pcb kugadzirisa. Heano mapfumbamwe mitemo:

Mutemo 1: Yakakwira-inomhanya chiratidzo chiratidzo chekudzivirira

Mukumhanyisa-kumhanyisa pcb dhizaini, kiyi yepamusoro-yekumhanyisa masaini mitsara senge wachi dzinoda kudzivirirwa. Kana vasina kudzivirirwa kana kungodzivirirwa zvishoma, EMI kudonhedza kunokonzerwa. Zvinokurudzirwa kuti tambo dzakadzivirirwa dzinocherwa pasi pega pega 1000mil.

Mutemo 2: yakavharwa-chiuno nzira dzemigwagwa yezvikwiriso-zvechimbichimbi

Yakavharwa-chiuno nzira yekuraira yeakakwira-mhanyisa masaini

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Yakavharwa-chiuno nzira yekuraira yeakakwira-mhanyisa masaini

Nekuda kwekuwedzera kwehuwandu hwePCBboard bhodhi, mainjiniya mazhinji ePBP LAYOUT anokanganisa kuita mukuita wiring. Mune mamwe mazwi, yakakwira-inomhanya sigineti network senge wachi wachi inogadzira yakavharwa-loop mhedzisiro kana yakawanda-nhete pcb wiring. Mhedzisiro yakadaro yakavharika-loop ichagadzira mhete antenna uye inowedzera EMI radiation yakasimba.

Mutemo 3: yakavhurika-loop nzira yekuraira yeakakwira-mhanyisa masaini

Yakavhurika-loop nzira yekuraira yeakakwira-kumhanya masaini

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Yakavhurika-loop nzira yekuraira yeakakwira-kumhanya masaini

Mutemo 2 wakataura kuti iyo yakavharwa-loop yemasaini-ekumhanyisa masaini inokonzeresa EMI radiation, nepo yakavhurika-chiuno ichakonzeresawo EMI radiation.

In high-speed signal network, such as clock signal, once the result of open loop is generated in the routing of multi-layer PCB, linear antenna will be generated and EMI radiation intensity will be increased.

Mutemo 4: hunhu impedance kuenderera mutemo wezvekumhanya-kumhanya masaini

Hunhu impedance kuenderera mutemo wezvekumusoro-kumhanya masaini

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Hunhu impedance kuenderera mutemo wezvekumusoro-kumhanya masaini

Kune ekumhanya-mhanyisa masaini, kuenderera kwehunhu impedance kunofanirwa kuve nechokwadi kana uchichinja pakati pezvikamu; kana zvisina kudaro, EMI radiation ichawedzerwa. That is, the wiring width of the same layer must be continuous, and the wiring impedance of different layers must be continuous.

Mutemo 5: kuendesa nzira yekuraira kwepamusoro-kumhanya pcb dhizaini

Hunhu impedance kuenderera mutemo wezvekumusoro-kumhanya masaini

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

The cables between two adjacent layers must be routed vertically. Otherwise, crosstalk may occur and EMI radiation may increase. Muchidimbu, padyo newiring matanda anoteera yakatwasuka, yakatwasuka uye yakatwasuka wiring nongedzo, uye wiring wiring inogona kudzvinyirira crosstalk pakati pemitsara.

Mutemo 6: Topology inotonga mukumhanyisa-kumhanyisa pcb dhizaini

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Hunhu impedance kuenderera mutemo wezvekumusoro-kumhanya masaini

In high-speed PCB design, the control of circuit board characteristic impedance and the design of topological structure under multi-load directly determine the success or failure of the product.

Iyo Daisy keteni topology inoratidzwa mumufananidzo, iyo inowanzo batsira kune vashoma Mhz. Inokurudzirwa kushandisa iyo nyeredzi symmetric chimiro kumashure kwekupedzisira mune yakakwira-kumhanya pcb dhizaini.

Mutemo 7: Resonance mutemo wehurefu hwemutsara

Resonance mutemo wehurefu hwemutsara

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Resonance mutemo wehurefu hwemutsara

Tarisa uone kana kureba kwetambo yechiratidzo uye kuwanda kwechiratidzo kuita resonance, kureva kuti kana iyo wiring kureba iri nguva dzakazara dzechiratidzo wavelength 1/4, iyi wiring inoburitsa resonance, uye resonance ichaburitsa mafungu emagetsi, kuburitsa kupindirana.

Rule 8: Backflow path rule

Kudzoka munzira nzira

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Kudzoka munzira nzira

Ese anoratidza kumhanya-mhanya anofanirwa kuve nenzira yakanaka yekudzokera kumashure. Deredza nzira yekudzokera kumashure yemasaini ekumhanya-mhanya senge wachi. Zvikasadaro mwaranzi ichawedzera zvakanyanya, uye huwandu hwemwaranzi hwakaenzana nenzvimbo yakakomberedzwa nenzira yechiratidzo uye nzira yekudzokera kumashure.

Mutemo 9: Chishandiso chinodzora capacitor yekuisa mitemo

Mitemo yekuisa decoupling capacitors emidziyo

Ndeipi mitemo yeEMI yekumhanyisa-kumhanyisa pcb dhizaini

Mitemo yekuisa decoupling capacitors emidziyo

Iyo nzvimbo yeiyo decoupling capacitor yakakosha kwazvo. Kuiswa zvisirizvo hakugone kuzadzikisa mhedzisiro yekubvongodza. Icho chirevo ndechekuti: padyo nepini yekupa magetsi, uye iyo capacitor yemagetsi magetsi wiring uye pasi yakakomberedzwa nenzvimbo diki kwazvo.