Dhizaini yemakaruwa inonyanya kutevera mitemo miviri:
1. Imwe yega yega danda rinofanira kunge riine danho rekutungamira renje (simba kana pasi ravhu);
2. Iyo yepakungwa hombe yemagetsi emagetsi uye pasi pasi rinofanira kuchengetwa padanho ririnhi kuti ripe hombe compling yekubatanidza;
Izvi zvinotevera zvinonyorwa stack kubva kune maviri-layer bhodhi kusvika masere-denderedzwa bhodhi semuenzaniso tsananguro:
1. Kugadziriswa kweimwe-stifti pcb bhodhi uye kaviri-siden pcb board
Zvemabhodhi maviri-denderedzwa, nekuda kwehuwandu hushoma hwezviyero, hapasisina dambudziko rekumirha. Kudzora kwe emi radiation kunonyanya kutariswa kubva kune wiring uye chimiro;
Iyo electromagnetic kuwirirana kwemabhodhi ematehwe emumwe-miviri-denderedzwa kwave kuwedzera uye zvakanyanya mukurumbira. Chikonzero chikuru cheichi chiitiko ndechekuti iyo Signal loop nzvimbo yakakura kwazvo, iyo isingabudisi chete yakasimba electromagnetic radiation, asi zvakare inoita kuti dunhu rinotarisisa pakukanganisa kwekunze. Kuti uvandudze ma electromagnetic kuwirirana kwedunhu, nzira iri nyore ndeyekuderedza iyo loop nzvimbo yeakakosha chiratidzo.
Key Signal: kubva pamaonero eElectromagnetic kuwirirana, masaini akakosha anonyanya kureva masaini anoburitsa radiation yakasimba uye masaini ane hanya nenyika kunze kwenyika. Zviratidzo zvinogona kuburitsa radical radiation kazhinji kazhinji nguva dzemapfungwa, dzakadai seyakaderera-order masaini emavhi kana kero. Masaini ayo anokoshesa kupindira ndeye analog masaini nemazinga akaderera.
Bhodhi dzega uye dzakapetwa-mbiri dzinowanzo shandiswa mune yakaderera-frequency analog dhizaini pazasi 10khz:
1) Iyo Simba Traces pane imwechete Doyer inotungamirwa radially, uye kureba kwemitsetse kunoderedzwa;
2) Paunenge uchimhanya simba uye waya dzemaya, dzinofanira kunge dziri pedyo nemumwe; Isa iyo ivhu waya parutivi rwekiyi chiratidzo chiratidzo, uye iyi ivhu waya inofanira kunge iri pedyo sezvinobvira kune waya chiratidzo. Nenzira iyi, nzvimbo diki yeLoop inoumbwa uye kunzwa kwemusiyano yemhando yemhando yekupindirana kwekunze kwakaderedzwa. Kana iyo ivhu wire inowedzerwa padyo neiyo chiratidzo waya chiratidzo, chiuno nenzvimbo diki inoumbwa. Chikwangwani chazvino chinonyatsotora chiuno ichi pane dzimwe dzevamwe waya.
3) Kana iri dunhu rechipiri Iyo loop nzvimbo yakaumbwa nenzira iyi yakaenzana nebvudzi redunhu redunhu rakawedzerwa nehurefu hwechiratidzo.
Maviri uye mana-layer lainates
1. Sig-GND (PWR) -PWR (GNG) -SIG;
2. GNG-Sig (PWR) -SIG (PWR) -GNG;
Kune madhiri maviri emakiromita maviri ekuremerwa, dambudziko rinogona kuitika kune iyo tsika 1.6mm (62mil) bhodhi bhekiti. Kupararira kwechikepe kuchava kwakakura kwazvo, izvo hazvisi zvekungobatsira kudzora zvisina kukodzera, kupindirana nekuvhara nekudzivirira; Kunyanya kupatsanurwa kukuru pakati peSimba pasi ndege dzinoderedza bhodhi yekugona uye haina kukodzera kuendesa ruzha.
Yokutanga chirongwa, chinowanzoiswa kune mamiriro ezvinhu apo kune akawanda machipisi pabhodhi. Rudzi urwu rwechirongwa runogona kuwana zviri nani si performance, hazvina kunaka kwazvo kune EMI kuita, kunyanya inofanira kudzora newiring uye zvimwe zvinhu. Pfungwa huru: Iyo pasi dura inoiswa pane iyo inobatanidza denderedzwa yeiyo signal layer ine chiratidzo chemagetsi, iyo inobatsira kutora uye kudzvinyirira radiation; Wedzera nharaunda yebhodhi kuratidza mutemo unosvika 20.
Kwemhinduro yechipiri, inowanzoshandiswa kuti chipenga chechipfuva chiri pabhodhi zvakaderera uye pane nzvimbo yakakwana yakatenderedza chip (isa iyo inodikanwa simba renzvimbo yekara). Muchirongwa ichi, iyo yekunze yePCB yakavhurwa pasi, uye pakati pezvikamu zviviri zviri chiratidzo / magetsi. Simba remagetsi pane signal layer rakakundwa nemutsara wakakura, izvo zvinogona kuita kuti nzira isingakanganiswe neyekupa mari yakaderera, uye kuratidzira kwechiratidzo kweshoko romukati rinogona zvakare kudzivirirwa neyekuchengetedzwa. Kubva pamaonero eEMI kutonga, iyi ndiyo yakanakisa 4-layer PCB chimiro chiripo.
Pfungwa huru: Iyo kureba pakati pezvikamu zvepakati zvechiratidzo uye simba kusanganisa maratidziro kunofanirwa kuve kwakawedzerwa, uye nhungamiro yambiro inofanirwa kuve yakatsauka kuti udzivise closstalk. Nzvimbo yebhodhi inofanira kudzorwa nenzira yakakodzera kuti aratidze hutongi hwa22; Kana iwe uchida kudzora kusakirwa kweropa, mhinduro iri pamusoro apa inofanira kungwarira kwazvo nzira yawa waya yakarongedzwa pasi pechitsuwa chemhangura simba uye nekuvapo. Pamusoro pezvo, mhangura pane iyo Simba SWOPLY kana Ground Layer inofanira kuve yakareruka zvakanyanya sezvinobvira kuve nechokwadi chekusimbisa DC uye yakaderera-frequency yekubatanidza.
Vatatu, vatanhatu-danda latinate
Kwemirairo neakakwira chip
1. Sig-GNG-Sig-PWR-GNG-Sig;
Kune rudzi urwu rwechirongwa, urwu rudzi rwechiratidzo chevarambi runogona kuwana kuvimbika Uye kana simba risina simba uye nzvimbo yepasi yakazara, inogona kupa nzira iri nani yekudzoka kune imwe neimwe chiratidzo.
2. GNG-Sig-GND-PWR-Sig -gnd;
Kune rudzi urwu rwechirongwa, urwu rudzi rwechirongwa chinongokodzera mamiriro ekushamisira esimba Izvo zvinofanirwa kucherechedzwa kuti iyo Simba Layer inofanira kunge iri padyo neiyo layer isiri iyo huru chikamu chepasi, nekuti ndege yepasi ichave yakakwana. Naizvozvo, EMI Performance iri nani pane yekutanga mhinduro.
Pfupiso: Kwematanhatu-layer board chirongwa, chinhambwe pakati peSimba Resimba uye pasi ravhu rinofanira kuderedzwa kuti vawane simba rakanaka uye pasi pekugara. Nekudaro, kunyangwe ubvu hwebhodhi ndezve 62mil uye dura rinodzikiswa, hazvisi nyore kudzora kupatsanurwa pakati pemagetsi makuru uye pasi rakadzika kwazvo. Kufananidza chirongwa chekutanga neChirongwa chechipiri, mutengo wezvirongwa rwechipiri zvichawedzera kwazvo. Naizvozvo, isu tinowanzo sarudza yekutanga sarudzo kana ichinyudza. Paunenge uchigadzira, tevera mutemo we20h uye girazi regirazi rekutonga dhizaini.
Ina uye masere-layer lesates
1. Ichi hachisi chinyorwa chakanaka chekusunga nekuda kwemarketlectromagnetic kutumira uye simba rakakura rekushandisa. Chimiro chayo chiri seinotevera:
1.Signal 1 chikamu chepasi, microstrip wiring layer
2. Signal 2 yemukati microstrip wiring layer, iri nani wiring layer (X gwara)
3.gorewnload
4. Signal 3 stripline inoramba ichitenderera, iri nani kufambisa layer (Y kutungamira)
5.Gignal 4 stripline inorira layer
6.6power
7. Signal 5 yemukati microstrip wiring layer
8.Gignal 6 microstrip trace layer
2. Iko kusiyanisa musiyano wechitatu kusanganisa nzira. Nekuda kwekuwedzera kweiyo renongedzo layer, iyo iri nani EMI performance, uye hunhu husina kukodzera chiratidzo chega chega chesini chinogona kuve chakadzorwa
1.Signal 1 Chikamu chepasi, microstrip wiring layer, yakanaka wiring layer
2. Ground stratum, yakanaka electromagnnetic wave kuwedzera kugona
3. Signal 2 stripline inoramba ichirira, yakanaka kufambisa layer
4. Simba Simba Resimba, kuumba yakanaka electromagnetic kusimuka nevhu revhu pazasi 5. Ground layer
6.Signal 3 stripline inorira layer, yakanaka kufambisa layer
7. Simba Stratum, ine simba rakakura rekuisa
8.Gignal 4 microstrip wiring layer, yakanaka wiring layer
3
1.Signal 1 Chikamu chepasi, microstrip wiring layer, yakanaka wiring layer
2. Ground stratum, yakanaka electromagnnetic wave kuwedzera kugona
3. Signal 2 stripline inoramba ichirira, yakanaka kufambisa layer
4.Power Power Layer, kugadzira yakanaka electromagnetic kusimuka nevhu pasi pazasi 5.ground pasi pasi
6.Signal 3 stripline inorira layer, yakanaka kufambisa layer
7. Ground stratum, yakanaka electromagnnetic wave kuwedzera kugona
8.Gignal 4 microstrip wiring layer, yakanaka wiring layer
Maitiro ekusarudza kuti mangani emabhodhi anoshandiswa mune yekugadzirwa uye maitiro ekuita zvinoenderana nezvakawanda network pane bhodhi, pin density, chiratidzo frequency, size size uye zvichingodaro. Kune izvi zvinhu, tinofanira kufunga nezvazvo. Kuti uwane mamwe manyorerwo okusangana network, iyo yepamusoro yePIN density uye yakakwira chiratidzo kuwanda, iyo nhamba yehuwandu hwebhuruu inofanirwa kutorwa zvakanyanya sezvinobvira. Kuti uwane yakanaka EMI performance, zvakanaka kuti uve nechokwadi chekuti imwe neimwe chiratidzo denderedzwa ine chirevo chayo.
