Chii chinonzi mhangura?

Iyo inonzi kudira kwemhangura ndeyekushandisa nzvimbo isina kushandiswa pabhodhi redunhu senzvimbo yekutarisa uye wozoizadza nemhangura yakasimba. Idzi nzvimbo dzemhangura dzinonziwo kuzara kwemhangura.

Kukosha kwekuputira kwemhangura ndiko kuderedza kusagadzikana kwetambo yepasi uye kuvandudza kugona kwekudzivirira-kupindira; kuderedza kudonha kwemagetsi uye kuvandudza kushanda kwesimba remagetsi; kubatanidza netambo yepasi kunogonawo kuderedza loop area.

Uyewo nechinangwa chekuita kuti PCB ive isina kukanganiswa sezvinobvira panguva yekutengesa, vazhinji vanogadzira PCB vachadawo kuti vagadziri vePCB vazadze nzvimbo dzakavhurika dzePCB nemhangura kana grid-yakafanana newaya pasi. Kana mhangura ikasabatwa zvakanaka, ichaita Kana pfuma isingakodzeri kurasikirwa, iko kupfekedzwa kwemhangura "kwakanakira kupfuura zvisingabatsiri" kana kuti "zvisina kunaka kupfuura zvakanakira" here?

Munhu wose anoziva kuti pasi pemamiriro epamusoro-soro, iyo yakagoverwa capacitance ye wiring pane yakadhindwa redunhu bhodhi ichashanda. Kana kureba kwakakura kupfuura 1/20 yeaya inowirirana yewavelength yeruzha frequency, antenna mhedzisiro ichaitika, uye ruzha ruchaburitswa kuburikidza newaya. Kana paine mhangura isina kudzika pasi yakadururwa muPCB, kudira kwemhangura kunova chishandiso chekuparadzira ruzha.

Nokudaro, munharaunda yepamusoro-frequency circuit, usafunga kuti tambo yepasi yakabatanidzwa pasi. Iyi ndiyo "ground wire". Izvo zvinodikanwa kubaya maburi mu wiring ne spacing isingasviki λ/20. Iyo pasi ndege ye laminate "ivhu rakanaka". Kana chifukidzo chemhangura chikabatwa zvakanaka, chifukidzo chemhangura hachingowedzera ikozvino, asiwo chinotora chikamu cheviri chekudzivirira kupindira.

Zvimiro zviviri zvemhangura yemhangura

Pane kazhinji nzira mbiri dzekutanga dzekupfekedza mhangura, dzinoti hombe-nzvimbo yekupfekedza mhangura uye grid copper. Inowanzobvunzwa kana yakakura-nzvimbo yemhangura yemhangura iri nani pane grid copper coating. Hazvina kunaka kuita generalize.

sei? Yakakura-nzvimbo yemhangura yemhangura ine mabasa maviri ekuwedzera ikozvino uye kudzivirira, asi kana yakakura-nzvimbo yemhangura yemhangura yakashandiswa kune wave soldering, bhodhi inogona kusimudza uye kunyange blisters. Nokudaro, nokuda kwemhangura yemhangura yakakura, ma grooves akawanda anowanzovhurwa kuti asunungure kuputika kwefoiri yemhangura. Sezvinoratidzwa pasi apa:

Iyo yakachena mhangura-yakapfeka gridi inonyanya kushandiswa pakudzivirira, uye mhedzisiro yekuwedzera ikozvino inoderedzwa. Kubva pakuona kwekupisa kupisa, grid yakanaka (inoderedza kupisa kwepamusoro pemhangura) uye inotora rimwe basa mukudzivirira kwemagetsi. Kunyanya kumatunhu akadai sekubata, sekuratidzwa pazasi:

Izvo zvinofanirwa kutaurwa kuti iyo grid inoumbwa nematehwe mune yakadzama nzira. Isu tinoziva kuti kudunhu, hupamhi hwekutsvagisa hunoenderana ne "kureba kwemagetsi" kweiyo inoshanda frequency yedunhu redunhu (iyo chaiyo saizi inopatsanurwa neThe digital frequency inoenderana nekushanda frequency inowanikwa, ona mabhuku ane hukama kuti uwane mamwe mashoko. )

Kana iyo frequency yekushanda isiri yakanyanya, pamwe mhedzisiro yemitsara yegridi haina kunyatso kuoneka. Kamwe urefu hwemagetsi hunoenderana nehuwandu hwekushanda, huchave hwakaipa zvikuru. Iwe uchaona kuti dunhu harishande nemazvo zvachose, uye sisitimu iri kubudisa kupindira kwese kwese. chiratidzo che.

Chirevo ndechekusarudza maererano nemamiriro ekushanda kwebhodhi redunhu rakagadzirirwa, usabatisise pane chimwe chinhu. Nokudaro, ma-high-frequency circuits ane zvinodiwa zvakanyanya kune-multi-purpose grids for anti-interference, uye pasi-frequency circuits ine matunhu ane mafungu makuru, akadai seanowanzoshandiswa mhangura yakakwana.