Yakakwira frequency PCB dhizaini

1. Ungasarudza sei PCB board?
Sarudzo yePCB board inofanirwa kuenzana pakati pemusangano wekugadzira zvinodiwa uye kugadzirwa kwakawanda uye mutengo. Zvido zvekugadzira zvinosanganisira zvikamu zvemagetsi uye zvemagetsi. Iri dambudziko rezvinhu rinowanzonyanya kukosha pakugadzira yakanyanya-kumhanya PCB mabhodhi (frequency yakakura kupfuura GHz).
Semuyenzaniso, iyo inowanzo shandiswa FR-4 zvinhu zvino ine dielectric kurasikirwa panguva yakati wandei GHz, iyo ine simba guru pakuderedza chiratidzo, uye inogona kunge isina kukodzera. Kana zviri zvemagetsi, teerera kuti dielectric inogara uye kurasikirwa kwedielectric kwakakodzera kune yakagadziriswa frequency.2. Nzira yekudzivirira sei kupindira kwepamusoro-soro?
Pfungwa huru yekudzivisa kukanganiswa kwepamusoro-soro ndeyekudzikisa kupindira kwemagetsi emagetsi emagetsi emhando yepamusoro, inova inonzi crosstalk (Crosstalk). Iwe unogona kuwedzera chinhambwe pakati pechiratidzo chepamusoro-chinomhanya uye chiratidzo cheanalog, kana kuwedzera pasi gadhi / shunt traces padivi peiyo analog chiratidzo. Uyewo teerera kune kupindira kweruzha kubva padhijitari pasi kusvika kune iyo analog pasi.3. Nzira yekugadzirisa sei dambudziko rekutendeseka kwechiratidzo mukugadzirwa kwepamusoro-soro?
Kutendeseka kwechiratidzo idambudziko rekufananidza. Izvo zvinhu zvinokanganisa impedance kufananidzwa zvinosanganisira chimiro uye kuburitsa impedance yechiratidzo sosi, hunhu hunhu hweiyo trace, hunhu hwekuguma kwemutoro, uye topology yekuteedzera. Mhinduro ndeyekuvimba netopology yekugumisa uye kugadziriswa kweiyo wiring.

4. Nzira yekusiyanisa wiring inowanikwa sei?
Pane mapoinzi maviri ekuti utarise mune marongerwo evaviri vanosiyanisa. Imwe ndeyokuti kureba kwetambo mbiri kunofanira kunge kwakareba sezvinobvira, uye imwe ndeyokuti chinhambwe chiri pakati petambo mbiri (iyi chinhambwe chinotaridzirwa nekusiyanisa impedance) inofanira kuchengetwa nguva dzose, ndiko kuti, kuchengeta kufanana. Kune nzira mbiri dzakafanana, imwe ndeyokuti mitsetse miviri inomhanya kune rimwe divi-ne-parutivi, uye imwe yacho ndeyokuti mitsetse miviri inomhanya pamatanho maviri ari pedyo (pamusoro-pasi). Kazhinji, iyo yekare yakatarisana-ne-parutivi (kurutivi-ne-kurutivi, kudivi-ne-kurutivi) inoshandiswa nenzira dzakawanda.

5. Nzira yekuziva sei mutsauko wiring yewachi siginecha mutsara une imwechete inobuda terminal?
Kuti ushandise mutsauko wiring, zvine musoro kuti chiratidzo chinobva uye chinogamuchira zvakare masaini ekusiyanisa. Naizvozvo, hazvigoneke kushandisa mutsauko wiring yechiratidzo chewachi ine imwechete inobuda terminal.

6. Ko chinopikisa chinofananidzira chinogona kuwedzerwa pakati pemitsara yekusiyanisa pairi pakugamuchira?
Kurwisana kunofananidzwa pakati pemitsara yakasiyana-siyana pamagumo ekugamuchira kunowanzowedzerwa, uye kukosha kwayo kunofanira kuenzana nekukosha kwekusiyanisa impedance. Nenzira iyi chiratidzo chechiratidzo chichava nani.

7. Sei wiring yemhando dzakasiyana-siyana ichifanira kuva pedyo uye yakafanana?
Iyo wiring yeaya akasiyana-siyana anofanirwa kunge ari pedyo uye akaenzana. Iyo inodaidzwa kuswedera kwakakodzera imhaka yekuti chinhambwe chinozokanganisa kukosha kwekusiyanisa impedance, inova yakakosha parameter yekugadzira akasiyana mapeya. Kudiwa kweparallelism zvakare kuchengetedza kuenderana kwekusiyanisa impedance. Kana iyo mitsetse miviri yakangoerekana yave kure uye pedyo, iyo impedance yekusiyanisa ichave isingaenderane, izvo zvinokanganisa kutendeseka kwechiratidzo uye kunonoka kwenguva.