Nekuuya kwezera reruzivo, kushandiswa kwepcb mapuranga kuri kuramba kuchiwedzera, uye kukura kwepcb mapuranga kuri kuramba kuchiwedzera kuoma.Sezvo zvikamu zvemagetsi zvakarongeka zvakanyanya uye zvakanyanya paPCB, kupindira kwemagetsi rave dambudziko risingadzivisike.Muchigadziro uye kushandiswa kwemapuranga akawanda-layer, chiratidzo chechiratidzo uye chigadziko chemasimba chinofanira kuparadzaniswa, saka kugadzirwa uye kurongeka kwe stack kunonyanya kukosha.Iyo yakanaka dhizaini dhizaini inogona kuderedza zvakanyanya simba reEMI uye crosstalk mumabhodhi akawanda.
Kuenzaniswa neakajairwa mabhodhi e-single-layer, dhizaini yeakawanda-layer mabhodhi anowedzera masignal layers, wiring layer, uye anoronga akazvimirira magetsi akaturikidzana uye pasi pasi.Zvakanakira zveakawanda-layer mapuranga zvinonyanya kuratidzwa mukupa yakagadzikana voltage yedhijitari chiratidzo chekushandura, uye zvakaenzana kuwedzera simba kune chimwe nechimwe chikamu panguva imwe chete, zvinobudirira kuderedza kupindira pakati pezviratidzo.
Simba rekushandisa rinoshandiswa munzvimbo yakakura yemhangura yekuisa uye pasi pasi, iyo inogona kuderedza zvakanyanya kupikisa kwesimba remagetsi uye pasi pasi, kuitira kuti magetsi ari pamagetsi emagetsi agadzikane, uye maitiro emutsara wega wega wechiratidzo. inogona kuvimbiswa, iyo inobatsira zvikuru kune impedance uye kuderedza crosstalk.Mukugadzirwa kwemapuranga epamusoro-soro, zvakanyatsotsanangurwa kuti zvinopfuura 60% zvezvirongwa zvekugadzirisa zvinofanira kushandiswa.Multi-layer boards, hunhu hwemagetsi, uye kudzvanya kwemwaranzi yemagetsi zvese zvine mabhenefiti asingaenzaniswi pamusoro pemabhodhi akaderera.Panyaya yemutengo, kazhinji kutaura, kuwanda kwezvikamu zviripo, iyo inodhura zvakanyanya mutengo, nekuti mutengo wePCB board unoenderana nehuwandu hwematanho, uye density pane imwe unit nzvimbo.Mushure mekuderedza nhamba yezvikamu, nzvimbo ye wiring ichaderedzwa, nokudaro ichiwedzera wiring density., uye kunyange kusangana nezvinodiwa zvekugadzira nekuderedza upamhi hwemutsara uye chinhambwe.Izvi zvinogona kuwedzera mari zvakakodzera.Zvinokwanisika kuderedza stacking uye kuderedza mari, asi inoita kuti kushanda kwemagetsi kuwedzere.Rudzi urwu rwekugadzira kazhinji runopesana.
Kutarisa paPCB microstrip wiring pamuenzaniso, pasi pevhu rinogonawo kuonekwa sechikamu chetambo yekufambisa.Iyo yevhu yendarira layer inogona kushandiswa sechiratidzo mutsara loop nzira.Iyo ndege yemagetsi yakabatana nendege yepasi kuburikidza ne decoupling capacitor, munyaya ye AC.Ose ari maviri akaenzana.Musiyano uripo pakati peyakaderera frequency uye yakakwira frequency ikozvino zvishwe ndiyo iyoyo.Pamafafitera akaderera, ikozvino kudzoka kunotevera nzira yekushomeka kushoma.Pamafafitera epamusoro, iyo yekudzoka ikozvino iri munzira yediki inductance.Ikozvino inodzoka, yakanyanyisa uye yakagoverwa zvakananga pasi pechiratidzo chechiratidzo.
Muchiitiko chepamusoro-frequency, kana waya yakanyatsoiswa pasi pevhu, kunyangwe paine zvishwe zvakawanda, kudzoka kwazvino kunoyerera ichidzokera kune chiratidzo chinobva kune wiring layer pasi penzira inotangira.Nekuti iyi nzira ine zvishoma impedance.Rudzi urwu rwekushandiswa kwehombe capacitive coupling kudzvanya munda wemagetsi, uye iyo minimumu capacitive coupling yekudzvanya iyo magineti chirimwa kuchengetedza yakaderera reactance, tinozvidaidza kuti self-shielding.
Iyo inogona kuoneka kubva kune formula yekuti kana yazvino ichiyerera ichidzoka, chinhambwe kubva kumutsara wechiratidzo chinopesana nehupamhi hwemazuva ano.Izvi zvinoderedza loop nzvimbo uye inductance.Panguva imwecheteyo, zvinogona kugumiswa kuti kana chinhambwe pakati pemutsara wechiratidzo uye chiuno chiri pedyo, mafungu ezviviri akafanana muhukuru uye akatarisana munzira.Uye iyo magineti inogadzirwa nenzvimbo yekunze inogona kudzikiswa, saka iyo yekunze EMI zvakare idiki kwazvo.Mukugadzira stack, zviri nani kuita kuti chiratidzo chega chega chienderane nechepazasi pevhu.
Mudambudziko recrosstalk pane yepasi layer, iyo crosstalk inokonzerwa nepamusoro-frequency maseketi inonyanya kukonzerwa nekubatanidza inductive.Kubva pane yazvino loop formula, zvinogona kugumiswa kuti loop currents inogadzirwa nemitsara miviri yemasaini pedyo pamwe chete inopindirana.Saka pachava nemagnetic interference.
K mune fomula inoenderana nenguva yekusimuka kwechiratidzo uye kureba kwemutsara wechiratidzo chekupindira.Muchigadziro che stack, kupfupisa chinhambwe pakati pechiratidzo chechiratidzo uye pasi pevhu zvinobudirira kuderedza kupindira kubva pasi pevhu.Paunenge uchiisa mhangura pamagetsi ekugadzirisa magetsi uye pasi pasi paPCB wiring, rusvingo rwekuparadzanisa ruchaonekwa munzvimbo yekuisa mhangura kana iwe usingateereri.Kuitika kwerudzi urwu rwedambudziko rinonyanya kuitika nekuda kwekuwanda kwekuwanda kwemaburi, kana kusanzwisisika dhizaini yenzvimbo yekuzviparadzanisa nevamwe.Izvi zvinoderedza nguva yekusimuka uye zvinowedzera loop nzvimbo.Inductance inowedzera uye inogadzira crosstalk uye EMI.
Tinofanira kuedza nepatinogona napo kumisa misoro yezvitoro iri vaviri vaviri.Izvi zviri mukufunga kwechiyero chechimiro chinodiwa mukuita, nekuti iyo isina kuenzana chimiro inogona kukonzera deformation yepcb board.Kune yega yega chiratidzo chechiratidzo, zvakanakisa kuve neguta rakajairwa senguva.Chinhambwe chiri pakati peiyo yepamusoro-yekupedzisira magetsi uye guta remhangura inokodzera kugadzikana uye kudzikisira kweEMI.Mukugadzira-kumhanya-mhanya kwebhodhi dhizaini, ndege dzepasi dzakadhindwa dzinogona kuwedzerwa kuti dziparadzanise ndege dzechiratidzo.
Nguva yekutumira: Mar-23-2023