1. Nzira yekusarudza Pcb bhodhi?

Pcbc bhodhi kusarudzwa kunofanirwa kusangana nezvakarongwa zvinodiwa uye kugadzirwa kwemazhinji uye mutengo wechiyero pakati. Izvo dhizaini zvinodiwa zvinosanganisira zvemagetsi uye zvemagetsi zvikamu. Izvi zvinowanzo kuve zvakakosha kana uchigadzira zvinokurumidza kwazvo pcb board (mafungidziro akakura kupfuura GHz). Semuenzaniso, iyo fr-4 zvinhu zvinowanzo shandiswa nhasi zvinogona kunge zvisina kukodzera nekuti kurasikirwa kwe dielectric pane akati wandei GHz kune simba guru pakurambidzwa kwechiratidzo. Panyaya yemagetsi, teerera kune dielectric kugara uye dielectric kurasikirwa pane yakagadzirirwa frequency.

2. Maitiro ekudzivirira kukwirisa kwepamusoro-frequency?

Pfungwa yekutanga yekudzivirira kukwirisa kwakanyanya kudzikisira kudzikisira kwepamusoro frequency chiratidzo chemagetsi emagetsi, inozivikanwawo seCrosstalk. Iwe unogona kuwedzera chinhambwe pakati peiyo yekumhanyisa chiratidzo uye chiratidzo cheanalogog, kana kuwedzera pasi gadhi / shunt zvisaririra kuchiratidzo cheanalogog. Uyezve teerera kune dhijitari pasi kune analog pasi ruzha kupindira.

3. Maitiro ekugadzirisa sei dambudziko rekutendeseka kwemasaini mune yekumhanyisa dhizaini?

Chiratidzo kutendeseka ingangoita nyaya yekufananidza impedance. Izvo zvinhu zvinokanganisa impedance enzanirana zvinosanganisira chiratidzo sosi dhizaini, kuburitsa impedance, tambo inoratidzira impedance, mutoro wedivi hunhu, uye tambo topology dhizaini. Mhinduro ndeye * terminaTIon uye gadzirisa iyo topology yeiyo tambo.

4. Maitiro ekuziva kusiyanisa wiring?

Iyo wiring yemusiyano vaviri ine mapoinzi maviri ekuteerera. Imwe ndeyekuti kureba kwemitsara miviri kunofanirwa kunge kwakareba sezvinobvira, uye imwe yacho ndeyekuti nhambwe iri pakati pemitsetse miviri (yakatarwa nemhedzisiro impedance) inofanirwa kugara ichigara, ndiko kuti, irambe ichienderana. Kune mairi modhi mbiri dzakafanana: imwe ndeyekuti mitsara miviri inomhanya kune imwechete-ne-parutivi nhete, uye imwe yacho ndeyekuti mitsara miviri inomhanya pamatanho maviri ari padyo nematanda ekumusoro neepasi. Kazhinji, iyo yekutanga divi-ne-parutivi kuitisa yakajairika.

5. Maitiro ekuziva musiyano wiring yewadhi chiratidzo tambo ine imwechete chete inobuda terminal?

Unoda kushandisa kusiyanisa wiring kunofanirwa kuve chiratidzo sosi uye kugamuchira magumo zvakare kusiyanisa chiratidzo kune chirevo. Saka hazvigoneke kushandisa musiyano wiring yechiratidzo chewachi nechinoburitsa chimwe chete.

6.Kana kuramba kunoenderana kunogona kuwedzerwa pakati peakasiyana mitsara vaviri pamucheto wekugamuchira?

Iko kuenderana kupokana pakati peyaviri yematanho mitsara pamagumo ekugashira inowanzo kuwedzerwa, uye kukosha kwayo kunofanirwa kuenzana nekukosha kwemisiyano impedance. Hunhu hwechiratidzo huchave nani.

7. Nei mawiring ematanho ari maviri achifanira kunge ari padyo uye achienzana?

Iyo wiring yemusiyano mapara inofanirwa kunge iri padyo padyo uye yakafanana. Iyo chaiyo kukwirira inokonzerwa nemisiyano impedance, inova yakakosha paramende mukugadzira musiyano mapara. Kufananidza kunodawo kuchengetedza kuenderana kwemisiyano impedance. Kana iyo mitsara miviri iri kure kana padyo, iyo mutsauko impedance ichave isingawirirane, iyo inokanganisa chiratidzo chekuvimbika uye kunonoka kweTIming.

8. Maitiro ekuita nekumwe kupokana kwedzidziso mune chaiko waya?

(1). Chaizvoizvo, zvakanaka kupatsanura ma module / nhamba. Kuchengetedza kunofanirwa kutorwa kuti usayambuke MOAT uye kwete kurega iyo magetsi uye chiratidzo chekudzoka nzira yazvino kukura zvakanyanya kwazvo.

(2). Crystal oscillator inoenzanisirwa yakanaka mhinduro inokatyamadza dunhu, uye akagadzika mascillating anonongedzera anofanirwa kusangana nematanho e loop kuwana uye chikamu, izvo zvinowanzo kukanganiswa, kunyangwe nechengetedzo yepasi zvingangotadza kudzikamisa zvachose kupindira. Uye zvakare kure kure, ruzha rwepasi ndege rwuchakanganisawo yakanaka mhinduro oscillation wedunhu. Naizvozvo, iva nechokwadi chekugadzira iyo yekristaro oscillator uye chip iri padhuze sezvinobvira.

(3). Chokwadi, pane kukakavara kwakawanda pakati peyekumhanyisa wiring uye EMI zvinodiwa. Zvisinei, chirevo chekutanga ndechekuti nekuda kwekushomeka capacitance kana Ferrite Bead yakawedzerwa neEMI, mamwe magetsi emagetsi echiratidzo haakwanise kukonzerwa kutadza kuzadzisa zvirevo. Naizvozvo, zvakanakisa kushandisa hunyanzvi hwekurongedza wiring uye pcb yekuisira kugadzirisa kana kudzikisa matambudziko eEMI, senge yekumhanyisa chiratidzo chiratidzo. Chekupedzisira, resistor capacitance kana Ferrite Bead nzira yakashandiswa kudzikisa kukanganisa kwechiratidzo.

9.Mabatiro ekugadzirisa kupokana pakati pewiring wiring uye otomatiki wiring yemasaini-ekumhanyisa mamasaini?

Mazuva ano, mazhinji emagetsi otomatiki ematebhuru mune yakasimba kabling software akaisa zvipingaidzo kudzora nzira yekumhanya uye huwandu hwemakomba. EDA makambani dzimwe nguva anosiyana zvakanyanya mukumisikidza kugona uye zvipingamupinyi zveinjini dzinomhanya. Semuenzaniso, kunyangwe paine zvipingamupinyi zvakakwana zvekudzora kuti serpenTIne mitsara inofefetera sei, kunyangwe paine zvipingamupinyi zvakakwana kudzora nzvimbo yekusiyana kwemaviri, nezvimwe. Izvi zvinokanganisa kuti otomatiki wiring kunze kweiyo wiring inogona kuenderana nemugadziri zano. Uye zvakare, kuoma kwekugadzirisa wiring kugadzirisa kunoenderanawo nekugona kweinjini. Semuenzaniso, iyo tambo inosundira kugona, kuburikidza neburi kusundira kugona, uye kunyangwe iyo waya pane yemhangura yekumhanyisa yekukanda kugona uye zvichingodaro. Saka, sarudza iyo cabler ine yakasimba yekumisikidza injini kugona, ndiyo nzira yekugadzirisa.

Nezve Test Coupon.

Iyo Test Coupon inoshandiswa kuyera kana hunhu impedance yeIPEDI pcb bhodhi inosangana nezvinodiwa dhizaini nekushandisa iyo Nguva Domain Reflectometer (TDR). Kazhinji, iyo impedance yekudzora ndeye imwechete tambo uye musiyano vaviri vaviri kesi. Naizvozvo, hupamhi hwemutsara uye nzvimbo yekusiyanisa (kana musiyano) paKuponi Coupon inofanira kunge yakafanana netambo iri kudzorwa. Chinhu chakanyanya kukosha ndiko iko kwenzvimbo yekutandarira. Kuti udzikise inductance kukosha kwepasi kutungamira, iyo nzvimbo yepasi yeTDR probe kazhinji iri padhuze padhuze neprobe tip. Naizvozvo, iyo daro uye nzira yekuyera chiratidzo poindi uye nzvimbo yekumisikidza pabvunzo Coupon inofanirwa kuenderana neyakaferefetwa.

11. Mukumhanyisa-kumhanyisa pcb dhizaini, iyo isina chinhu nzvimbo yechiratidzo denderedzwa inogona kuve yakapetwa-mhangura, uye maitiro ekuparadzira mhangura-yakaputirwa pane pasi uye magetsi emawadhi emasaini akawanda?

Kazhinji munzvimbo isina chinhu yemhangura kupfeka kazhinji kesi yacho yakavakirwa pasi. Ingo teerera kune chinhambwe pakati pemhangura netambo yechiratidzo kana mhangura yaiswa padhuze neiyo yekumhanyisa-chiratidzo chiratidzo mutsetse, nekuti mhangura yakaiswa inoderedza hunhu impedance yetambo. Zvakare chenjera kuti usakanganisa hunhu hwemamwe maratidziro, senge mune mbiri stripline yekuvaka.

12. Inogona here tambo yekuratidzira pamusoro penzvimbo yekushandisa magetsi kuverenga iyo impedance uchishandisa microstrip mutsara modhi? Inogona here chiratidzo pakati pekupihwa magetsi neyendege ndege inogona kuverengerwa uchishandisa ribhoni-mutsara modhi?

Ehe, iyo ndege yesimba neyepasi ndege inofanirwa kutariswa seyekureva ndege kana uchiverenga hunhu impedance. Semuenzaniso, ina-mana-bhodhi bhodhi: pamusoro pesimba – simba rukoko – stratum – pasi rukoko. Mune ino kesi, iyo modhi yepamusoro top weti wiring hunhu impedance ndeye microstrip mutsara modhi ine simba ndege sereferensi ndege.

13. Unogona here kuyera mapoinzi otomatiki anogadzirwa nesoftware pane yakakwira density PCB inosangana nezvinodiwa zvebvunzo mukugadzirwa kwakawanda muzhinji?

Kunyangwe mapoinzi ebvunzo akagadzirwa otomatiki neyakajairika software anogona kusangana nezvinodiwa pakuyedza zvinoenderana nekuti maratidziro eakawedzerwa mapoinzi ebvunzo anosangana nezvinodiwa zvemuchina wekuyedza. Uye zvakare, kana iyo wiring yakanyanyisa kukaka uye iwo marongero ekuwedzera bvunzo mapoinzi, anogona kunge asingakwanise kuwedzera otomatiki mapoinzi ebvunzo kuchikamu chimwe nechimwe chemutsara, hongu, unofanirwa kupedzisa bvunzo nzvimbo.

14. Ko kuwedzerwa kwenzvimbo dzekuyedza kuchakanganisa mhando yemasaini ekumhanya-mhanya?

Kunyangwe ichikanganisa mhando yemasaini zvinoenderana nekuti poindi dzekuyedzwa dzinowedzerwa sei uye nekukurumidza sei chiratidzo. Chaizvoizvo, mamwe mabvunzo ebvunzo (kwete kuburikidza kana DIP pini seyedzo mapoinzi) anogona kuwedzerwa kumutsara kana kuburitswa kunze kwetambo. Iyo yekutanga yakaenzana nekuwedzera idiki kwazvo capacitor pamutsara, iyo yekupedzisira ibazi rekuwedzera. Ose ari maviri mamiriro aya ane zvakanyanya kana kushomeka pesimba pamadhigidhi-ekumhanyisa, uye iwo mwero wekukanganisa une hukama neiyo frequency kumhanya uye kumucheto chiyero chechiratidzo. Iko kukurudzira kunogona kuwanikwa kuburikidza nekuenzanisa. Mukutaura, iyo diki iyo yekuyedza poindi, zvirinani (hongu, kuzadzisa zvinodiwa zvemuchina wekuyedza) kupfupisa iro bazi, zvirinani.

15. Huwandu hwePCB system, sei kubatanidza pasi pakati pemabhodhi?

Kana iyo chiratidzo kana magetsi pakati pebhodhi rimwe nerimwe rePCB rakabatana kune mumwe nemumwe, semuenzaniso, Bhodhi rine magetsi kana chiratidzo kune B bhodhi, panofanirwa kuve neyakaenzana huwandu hwazvino kubva pasi pasi kuyerera kudzokera kuA board (iyi Kirchoff mutemo uripo). Ikozvino mune ino dura inowana nzira yayo kudzokera kune yakaderera impedance. Naizvozvo, huwandu hwepini dzakapihwa iyo yekuumbwa haifanire kunge yakanyanya kuderera pane yega yega interface, kungave simba kana chiratidzo chenguva, kudzikisira impedance uye nekudaro kudzikisira ruzha rwekuumba. Izvo zvakare zvinokwanisika kuongorora iyo yese yazvino chiuno, kunyanya chikamu chikuru chezvino, uye gadzirisa kubatana kwevhu kana pasi kudzora kuyerera kwazvino (semuenzaniso, kugadzira yakaderera impedance mune imwe nzvimbo kuitira kuti vazhinji yezvazvino inoyerera kuburikidza nenzvimbo iyoyo), ichideredza kukanganisa kune mamwe masaini akasimba.