Iko kunonzi kupfeka kwemhangura kutora nzvimbo isina basa pa PCB sedanho rekutarisa, uye wozadza nemhangura yakasimba, idzi nzvimbo dzemhangura dzinodaidzwa zvakare kunzi kuzadza kwemhangura. Iko kukosha kwekupfeka kwemhangura ndiko kudzora impedance yetambo yepasi uye nekuvandudza kugona-kupindira kugona. Deredza kudzora kwemagetsi, kugadzirisa mashandiro emagetsi; Kubatanidza kune ivhu zvakare kunoderedza iyo loop nzvimbo.

Ndezvipi zvakanakira nekuipira pakufukidza pcb mhangura

Kufukidza mhangura chikamu chakakosha chePCB dhizaini. Ose epamba Qingyuefeng pcb dhizaini software uye imwe yekunze Protel uye PowerPCB inopa akangwara mhangura yekuvhara basa. Saka maitiro ekushandisa mhangura zvakanaka, ini ndichagovana mamwe mazano angu newe, ndichitarisira kuunza mabhenefiti kune vezera.

Iko kunonzi kupfeka kwemhangura ndiko kutora nzvimbo isina basa paPCB seyero yekureva, uye wozadza nemhangura yakasimba, idzi nzvimbo dzemhangura dzinodaidzwa zvakare kuti kuzadza kwemhangura. Iko kukosha kwekupfeka kwemhangura ndiko kudzora impedance yetambo yepasi uye nekuvandudza kugona-kupindira kugona. Deredza kudzora kwemagetsi, kugadzirisa mashandiro emagetsi; Kubatanidza kune ivhu zvakare kunoderedza iyo loop nzvimbo. Kuti kurerutsa deformation pamusoro pcb nomoto, vakawanda pcb vagadziri vanodawo pcb vagadziri kuzadza mhangura ganda kana afoot-kufanana pasi waya munzvimbo yakazaruka pcb. Kana chifukidzo chemhangura chikasabatwa nemazvo, hachizopihwe mubairo uye kurasikirwa. Kuvhara mhangura “kwakanyanya kunaka kupfuura kukuvadza” kana “kukuvadza kupfuura kunaka”?

Pasi pemamiriro ehupamhi hwepamhepo inozivikanwa kune vese, pane yakadhindwa wedunhu bhodhi wiring capacitance inoshanda, kana iyo urefu iri inopfuura 1/20 yeruzha frequency inoenderana wavelength, inogona kuburitsa iyo antenna mhedzisiro, ruzha ruchaburitsa kunze kuburikidza newiring , kana paine yakaipa grounding mhangura yakapfeka muPCB, mhangura yakapfeka yakava chishandiso chekufambisa ruzha, saka, mune yakakwira frequency dunhu, Usafunge kuti ivhu kumwe kwakabatana nepasi, iyi “ivhu”, inofanirwa kunge iri pasi pe λ / 20 yekusiyana, muburi rewiring, uye pasi peiyo multilayer board “yakanaka grounding”. Kana iyo yemhangura kupfeka ikarapwa zvakanaka, iyo yemhangura yekumhara haingowedzere iyo yazvino chete, asi zvakare inoita basa rechipiri mukudzivirira kupindira.

Kufukidza mhangura kazhinji kune nzira mbiri dzakakosha, inzvimbo yakakura yekufukidza mhangura uye grid mhangura, kazhinji mumwe munhu akabvunzwa, nzvimbo hombe yekufukidza mhangura kana grid yekufukidza mhangura yakanaka, yakaipa generalization. Nei izvozvo? Yakakura nzvimbo yemhangura kupfeka, ine yakawedzera zvazvino uye inodzivirira mbiri basa, asi hombe nzvimbo yemhangura kupfeka, kana wave wave, bhodhi rinogona kuve rakamonyoroka, kana kutoputika. Naizvozvo, yakakura nzvimbo yemhangura yekumhanyisa, kazhinji zvakare yakavhura mashoma mashoma, anoderedza mhangura foil achipupira furo, yakachena grid yemhangura kupfeka inonyanya kudzivirirwa, kuwedzera basa razvino kuderedzwa, kubva pakuona kwekupisa kupisa, gridhi ine mukana ( inoderedza kudziya kwepamusoro kwemhangura) uye ine basa rakati mune remagetsi remagetsi. Asi zvinofanirwa kunongedzerwa kuti, iyo gridhi inogadzirwa nekuchinjisa nzira yekumhanya, isu tinoziva kune redunhu mutsara upamhi hwehuwandu hwebasa redunhu bhodhi ine inoenderana “magetsi” kureba kwe (saizi chaiyo yakakamurwa neanoshanda frequency yeiyo inoenderana nedhijitari frequency, mabhuku ekongiri), kana iyo frequency yekushanda isiri yakanyanya kukwirira, Pamwe iyo grid mitsara haishande chaizvo, asi kana iko kureba kwesimba kuchienderana neiyo frequency yekushanda, yakaipa kwazvo, uye iwe ukaona kuti dunhu harishande zvachose, uye pane zviratidzo zvinodzika munzvimbo yese. izvo zvinokanganisa mashandiro ehurongwa. Saka kune avo vanoshandisa gridhi, zano rangu nderekusarudza zvinoenderana nedhizaiti redunhu bhodhi, usanamatira kuchinhu chimwe. Saka iyo yepamusoro-frequency dunhu inopesana neyakavhiringidzwa zvinodiwa yeyakakwira yakawanda-chinangwa gridhi, yakaderera-frequency dunhu ine hombe yazvino dunhu uye imwe inowanzo shandiswa yakazara mhangura kuisa.

Tataura zvakawanda, isu tinofanirwa kutarisisa kumatambudziko iwayo mukufukidza mhangura kuti tiwane chinodiwa chekuputira mhangura:

1.Kana paine dzakawanda pcb pasi, SGND, AGND, GND, nezvimwe, zvinofanirwa kushandisa inonyanya kukosha “pasi” sekureva kune zvakasununguka kupfeka mhangura zvinoenderana neakasiyana pcb nzvimbo chinzvimbo. Izvo hazvina kutaurwa kuti dhijitari ivhu uye pasi yeanalogog zvakapoteredzwa zvakapetwa mhangura, panguva imwechete, isati yavhara mhangura, tambo dzemagetsi dzinoenderana dzinofanirwa kukosheswa: 5.0V, 3.3V, nezvimwewo.

2. Kune imwechete poindi yekubatanidza yevhu rakasiyana, iyo nzira ndeyekubatanidza ne0 ohms kuramba kana magnetic mabhedi kana inductance;

3.Copper unhani padyo nekristaro oscillator, iyo kristaro oscillator mudunhu iri yakakwira frequency emission sosi, inova yemhangura kupfeka kwakakomberedza kristaro oscillator, uyezve iro ganda rekristaro oscillator rakasarudzika pasi.

4. Chitsuwa (akafa zone) dambudziko, kana iwe uchifunga kuti rakanyanya kukura, saka harisi dambudziko rakawanda kutsanangura gomba uye kuwedzera iro.

5. Pakutanga kweiyo wiring, pasi inofanira kurapwa zvakaenzana. Kana waya yaiswa, pasi inofanira kufamba zvakanaka.

6. Zvirinani kusave nemakona akapinza pabhodhi (“= 180 madhigirii”), nekuti kubva pakuona kwemaelectromagnetism, izvi zvinogadzira kutakura kanyanga!

7. Usafukidze mhangura munzvimbo yakavhurika yewiring yepakati yepakati ye multilayer. Nekuti zvinonetsa kuti micheka yemhangura ive “yakanaka ivhu.”

8. Ita shuwa kuti simbi dziri mukati mechigadzirwa, senge simbi yekupisa simbi uye tambo yekusimbisa simbi, dzakadzika zvakanaka.

9. Iyo yekudziya dissipation simbi block yeiyo matatu-terminal mutongi inofanirwa kuve yakadzika pasi. Iyo yekumisikidza yekuzviparadzanisa bhandi padyo nekristaro oscillator inofanirwa kuve yakadzika ivhu. Muchidimbu: iyo yemhangura kupfeka paPCB, kana dambudziko rekumisikidza rikabatwa zvakanaka, iri “rakanyanya kunaka kupfuura rakaipa”, rinogona kudzora nzvimbo yekudzokera kumashure kwetambo yechiratidzo, kudzikisira chiratidzo chekunze kwemagetsi emagetsi.