Circuit Board Layout: Nyanzvi Techniques Kunzvenga Pitfas

Kugadzira inobudirira redunhu bhodhi marongero anoenda kupfuura kutevedzera mwero nhungamiro; zvinoda nuanced sarudzo kunzvenga misungo yakajairika inogona kukanganisa kuita, kuvimbika, uye kugadzira. Muchinyorwa chino, isu tichatarisa kune epamberi, kazhinji-asingatarisirwe maitiro uye ruzivo runogona kubatsira PCB vagadziri kudzivirira anogara achikanganisa uye kugadzira akagadziridzwa marongero echero anonyanya kudiwa maapplication.

1. Kururamisa muSignal Return Path Planning

Chimwe chikanganiso chakajairika, kunyangwe pakati pevagadziri vane ruzivo, kurerutsa kukosha kwenzira dzakajeka, dzakaderera-impedance dzekudzoka kune masaini ekumhanya-mhanya. Nzira isina kunaka yekudzoka inogona kutungamirira kuEMI nyaya, kuwedzera kuderedzwa kwechiratidzo, uye maitiro asingatarisike.

• Kupatsanura Ndege Dzepasi : Dzivisa kupatsanura ndege dzepasi munzvimbo dzakakosha. Vagadziri dzimwe nguva vanofambisa zviratidzo pamusoro pendege yepasi yakapatsanurwa, zvichiita kuti mafungu ekudzoka atore nzira dzakareba, izvo zvinogona kukonzera ruzha. Iva nechokwadi chekuti zviratidzo zvese zvinomhanya zvakanyanya zvine nzira inodzokera inoenderera mberi kuderedza mhedzisiro iyi.

• MaCapacitor Ekusona : Paunenge uchiyambuka kubva pane imwe plane kuenda kune imwe, senge kubva pane digital kuenda pane analog plane, shandisa macapacitor ekusona kuti upe nzira pfupi yekudzoka kwema frequency ane high-frequency. Izvi zvinoderedza mukana wekubatana kweruzha uye zvinochengetedza kuvimbika kwechiratidzo mumiganhu.

2. Adaptive Power Decoupling Strategies

Decoupling capacitors haingori nyaya yekuisa akajairwa tsika padyo neICs. Kusarudza hunhu hwakakodzera uye nekuisa zvichienderana nezvinodiwa chaizvo zvinogona kuita mutsauko wakakura.

• Manetwork Ekugadzirisa Magadzirirwo Emagetsi : Pamashandisirwo emagetsi ane simba guru, shandisa musanganiswa we capacitor values ​​kuti uvhare huwandu hwemafrequency hwakafara. Ma capacitor ari mu 10-100 nF anotarisa mafrequency akakwira, nepo ma capacitor makuru achibata mafrequency akaderera. Dzivisa kuwandisa ma capacitor pahuwandu hwemafrequency humwe chete, sezvo izvi zvinogona kutungamira ku resonant peaks dzinokonzera kusagadzikana kwesimba.

• Kuisa Capacitor Pamberi : Kunyange hazvo mazano akajairika achikurudzira kuisa ma capacitor pedyo nema power pins, isa pamberi kuiswa kwema IC ane simba rakakosha, senge ma FPGA kana ma processor, uko kusakwana kwekubatanidza kunogona kukanganisa mashandiro. Ma IC asina kukosha anogona kugovera zviwanikwa zvekubatanidza kuchengetedza nzvimbo uye kuderedza kuomarara kusingakoshi.

3. Kudzivirira Kuwedzera Kuwedzera Kusawirirana muMulti-Layer Boards

Pakushanda nemabhodhi ane zvidimbu zvakawanda anosanganisa zvinhu zvine mwero wekuwedzera kwekupisa kwakasiyana, senge FR4 ine zvidimbu zvinorema zvemhangura, kusawirirana kwekupisa kunogona kukonzera kushushikana nekukombama, kunyanya mumagadzirirwo ane simba guru.

• Kuisa muunganidzwa wezvikamu zvakaringana : Iva nechokwadi chekuti mhangura yakapararira zvakaenzana pachikamu chimwe nechimwe kudzivirira kutenderera. Kurema kwemhangura kusina kuenzana kunogona kukonzera kukotama panguva yekugadzira. Kuti udzivise izvi, tarisa nzvimbo dzakakora dzemhangura pazvikamu zvakapesana kana kuwedzera zvinhu zvisina kuenzana zvemhangura kuti zvienzane.

• Zvinhu Zvinowedzera-Kubhadhara : Kune magadzirirwo anofambirana nekupisa kwakanyanya, funga nezvema laminates anoshanda zvakanaka ane mwero wekuwedzera kupisa wakaenzana. Zvinhu izvi zvinogona kuvandudza hupenyu hurefu uye kuderedza njodzi yekuparadzaniswa kwezvikamu mumabasa akakosha, akadai semuchadenga nemagetsi emotokari.

4. Strategic Via Management: Matekiniki ekudzivisa Chiratidzo uye Masimba Masimba muPCB Dhizaini.

Vias akakosha mudhizaini bhodhi dhizaini, kunyanya kune yakaoma multi-layer mabhodhi kwaanoshanda seanobatana pakati peakasiyana akaturikidzana. Nekudaro, kana ikasadzorwa zvine mutsindo, vias inogona kutungamirira kune kusaina kuvimbika nyaya, kusakwana kwesimba, uye matambudziko ekupisa anokanganisa kuita kwebhodhi kwese. Kunzwisisa maitiro ekugadzirisa kuburikidza nekushandisa hakungogone kuvandudza mashandiro echiratidzo uye manejimendi ekupisa asiwo kubatsira kuderedza mitengo. Pazasi, isu tinonyura mune akanakisa maitiro, matipi, uye mari-yekuchengetedza maitiro ekugadzirisa vias zvinobudirira.

Kusarudza Rudzi Rwakakodzera rweVia yeKugadzira

Vias dzinouya nenzira dzinoverengeka-nemugomba, bofu, kuvigwa, uye microvias-imwe neimwe ine akasiyana mashandisirwo uye zvinorehwa nedhizaini yakaoma, mutengo, uye kuita.

• Kuburikidza neHole Vias: The akajairika mhando, kubudikidza-gomba vias, span yose PCB ukobvu uye akakodzera yakaderera-density mapuranga. Nekudaro, ivo vanogadzira stubs pane yakakwira-kumhanya masaini, ayo anogona kukanganisa kutendeseka kwechiratidzo. Back-drilling inogona kubvisa idzi stubs, kunyangwe ichiwedzera mutengo wekugadzira.
• Mapofu uye Akavigwa Vias: Bofu vias batanidza nzvimbo kune yemukati layer, nepo kuvigwa vias batanidza zvidimbu zviviri zvemukati usingasviki pamusoro. Ose ari maviri anobatsira kuchengetedza nzvimbo, asi anodhura kugadzira. Zvishandise zvine mutsindo mumadhizaini akakora kana maseketi anomhanya-mhanya uko kudzikisira kuburikidza nehurefu hwe stub uye kuderedza kupindira kwechiratidzo kwakakosha.
• Microvias: Inowanzo shandiswa muHigh-Density Interconnect (HDI) mabhodhi, ma microvias ane madhayamita madiki uye anogona kungopfuura imwe layer. Iwo akanakira dhizaini-pitch dhizaini uye anogona kuderedza ukobvu hwebhodhi, asi iwo anodhura zvakanyanya. Shandisa mamicrovias zvakasarudzwa munzvimbo dzinoda ma-high-speed interconnected kana compact component kuiswa.

Kana bhajeti ichibvumira chete mapofu mashoma kana akavigwa vias, vachengetere nzvimbo dzine chiratidzo chepamusoro chekuvimbika zvinodiwa, senge high-speed differential pairs. Kune zvishoma zvakakosha zvinongedzo, mureza kuburikidza-gomba vias vane mari yakawanda.

Anti-Pad Optimization yeHigh-Frequency Signals

Yakakwira-frequency masiginecha anotarisana nemamwe matambudziko kana achifambiswa kuburikidza nevias, sezvo ivo vachigona kusangana ne impedance mismatches inotungamira kukuratidzira uye kurasikirwa kwechiratidzo. Iyo anti-pad, kana chivharo chakatenderedza kuburikidza nendege yepasi, inoita basa rakakosha mukuona kugona kweiyo via.

• Kudzora Anti-Pad Size: Kugadzirisa saizi ye-anti-pad inogona kubatsira kuyera capacitance uye inductance yeiyo via. Iyo yakakura anti-pad inoderedza capacitance, ichideredza kuderedzwa kwechiratidzo. Nekudaro, izvi zvinogona zvakare kuwedzera inductance, saka kuwana chiyero chakakodzera ndicho chinhu chakakosha. Kune akawanda epamusoro-frequency dhizaini, kushandisa maturusi ekuenzanisa kuita zvakanaka-tune anti-pad saizi yekumhanya kwechiratidzo kwakakosha.
• Kushandisa Grounded Stitching Vias: Kune masaini anonyanya kunzwa ruzha, senge RF kana yakakwira-kumhanya mitsara yedhijitari, funga kuisa vias zvekusona kutenderedza chiratidzo chekutanga kuburikidza. Aya ma stitching vias akabatana nepasi uye anobatsira kugadzira nhovo yepasi, kuderedza inogona kuitika EMI uye crosstalk.

Shandisa 3D electromagnetic simulation maturusi kuenzanisira kuburikidza nezvivakwa munzvimbo dzakaoma-kumhanya, optimize anti-pad saizi uye kuiswa kune yega yega dhizaini kwete kuvimba neakajairwa saizi.

Nepo optimize anti-pad saizi kune yega yega kwakanakira, tarisa kune dzakakosha masaini nzira sewachi mitsetse kana mabhazi edata. Kushandisa chiyero kuburikidza nezvimiro panzira dzisiri dzakakosha kunoderedza kuoma kwekugadzira uye mutengo wekugadzira.

Thermal Via Arrays yeKushanda Kupisa Kubvisa

Kutonga kwekupisa kwakakosha, kunyanya mumagadzirirwo emagetsi epamusoro apo zvinhu zvakaita semagetsi ekudzora, MOSFETs, uye maLEDs anogona kuburitsa kupisa kwakanyanya. Thermal vias maduku vias anobatsira kutamisa kupisa kubva pamusoro rukoko kuti yomukati akaturikidzana kana kunyange pasi rukoko, achibatsira mukuparara.

• Kugadzira Thermal Via Arrays: Panzvimbo peimwe hombe vias, ruzhinji rwemavias madiki anogona kukwidziridza kutamisa nekuda kwekuwedzera kwenzvimbo yekubata. Position thermal vias pasi pezvinhu zvinogadzira kupisa uye zvibatanidze kune hombe yemhangura inodururwa pamitsetse yemukati kana pasi pedenga, ichigadzira nzira yakananga yekupisa.
• Via Zadza Sarudzo: Kune vias pasi pezvikamu zvinoda yakagadzikana yekudziya yekubatanidza, funga yakazadzwa kana yakavharirwa vias. Yakazadzwa vias inovandudza kupisa conduction uye inopa kugadzikana kwemichina, iyo yakakosha pasi pezvikamu zvakaita semagetsi transistors. Ziva kuti kuzadza vias kunowedzera mutengo, saka izvi zvinofanirwa kushandiswa zvakasarudzwa kune yakakwirira-simba nzvimbo.
• Copper Dururira uye Ndege Connection: Batanidza thermal vias kune yakatsaurirwa pasi kana ndege yemagetsi inoshanda seanoparadzira kupisa. Kuwedzera ukobvu hwemhangura (semuenzaniso, 2 oz pachinzvimbo che 1 oz) pamatanho ane viyas inopisa inogona kuwedzera kuwedzera kupisa asi inowedzera mutengo webhodhi. Ongorora mutengo maringe nekupisa kwekuita zvinodiwa pakusarudza ukobvu hwemhangura.

Space thermal vias muhurongwa ine yakajairika yepakati-kusvika-pakati spacing ye 1.0 kusvika 1.5 mm kuti ienzane nekupisa kwekuita uye kusimba kwechimiro. Zvakare, dzivirira zvakanyanyisa kuburikidza nekuwanda sezvo zvichigona kuomesa kugadzira uye kuwedzera mitengo.

Shandisa yakajairwa-saizi yemafuta vias uye dzivirira zvakanyanya-kutsanangura kuburikidza ne density kunze kwekunge zvakakodzera. Kune madhizaini ane mwero kupisa zvinodiwa, sparse kuburikidza nepateni inogona kukwana, ichideredza kudiwa kweinodhura yekupisa.

Kuderedza Chiratidzo Kunonoka uye Kurasikirwa kweSimba neVia Kuiswa

Chiratidzo kunonoka uye kurasikirwa kwesimba kunogona kuve nyaya mumagadzirirwo apo vias inoshandiswa zvakanyanya kana kuiswa pasina zano rakajeka. Kuiswa uye mhando yevias inoshandiswa musimba uye ndege dzepasi dzinogona kukanganisa zvakanyanya kushanda, kunyanya mumagadzirirwo epamusoro-azvino kana anomhanyisa.

• Parallel Vias for High Current Paths: Nzira dzakakwirira-dzazvino, dzakadai semagetsi emagetsi, hazvifanirwe kuvimba nenzira imwe chete. Pane kudaro, shandisa akawanda vias mukufanana kugovera ikozvino mutoro uye kuderedza kuramba. Izvi zvinodzivirira kupisa kwenzvimbo uye zvinogona kuvimbika nyaya nekufamba kwenguva.
• Kunzvenga Kuchinja Kusina Kufanira Layer: Imwe neimwe kuburikidza inosuma shoma shoma inductance, iyo inogona kuunganidza uye kukonzera chiratidzo kunonoka. Deredzai shanduko yezviyereso zvekumhanya-mhanya nekuronga nzira yekuronda nemazvo. Kune mabhazi anomhanya-mhanya, chengetedza shanduko yekuchinja kune yakakwana, sezvo imwe neimwe kuburikidza inogona kuwedzera kunonoka uye kuderera kwechiratidzo.
• Kuve nechokwadi Nekupfupi Kudzoka Nzira: Kune masiginecha anoshandura maseru, ita shuwa kuti nzira dzekudzoka dziri padyo sezvinobvira kuti uderedze loop nzvimbo. Semuyenzaniso, kana chiratidzo chichifamba kubva pachikamu 1 kuenda ku3, isa ivhu nepedyo kuti upe yakaderera-impedance nzira yekudzoka, kuderedza ruzha uye EMI.

Mumagetsi ekugovera network (PDNs), govera vias zvakafanana munzira pane kuzviisa munzvimbo imwechete. Izvi zvinowedzera kugovera kwazvino uye kudzivirira mabhodhoro anotungamira kumadonhwe emagetsi.

Panzvimbo pekushandisa dense kuburikidza nearray pane yega yega tambo yemagetsi, ongorora izvo zvazvino zvinodiwa. Kune yakaderera-ikozvino mitsetse, vias shoma anogona kukwana, kuderedza zvose kugadzira kuoma uye mutengo.

Yepamberi Tekinoroji: Yakasimudzika Microvias uye Kumashure-Kudhiraivha

Kune yakanyanya-density kana yakakwirira-frequency dhizaini, yepamberi kuburikidza nehunyanzvi senge yakadzikama microvias uye kumashure-kuchera kunogona kukwidziridza mashandiro, kunyangwe ivo vachiuya nekuwedzera kuomarara uye mutengo wekufunga.

• Yakazununguka Microvias: Kumabhodhi eHDI, ma microvias akadzedzereka (kuisa vias panzvimbo dzakadzika panzvimbo pekuisa) anonatsiridza kuvimbika uye anogona kudhurira zvichienzaniswa neakaturikidzana vias. Kudedera zvakare kunoderedza kushushikana kwemagetsi panguva yekugadzira, iyo yakakosha mumagadzirirwo ane akawanda microvia layer.
• Back-Drilling to Minimize Stubs: Via stubs zvikamu zvevias izvo zvisingabatanidzi kune chiratidzo chechiratidzo, uye anoita seasingadiwe antenna mumadhizaini ekumhanya. Kuchera-kumashure kunobvisa idzi stubs, kuderedza kuratidzwa uye kunatsiridza kutendeseka kwechiratidzo. Nekudaro, kuchera-kumashure kunoda kurongeka uye kunowedzera mutengo wekugadzira, saka inofanirwa kuchengeterwa nzira dzakakosha dzekumhanya-mhanya.

Shandisa ma microvias akadzikama panzvimbo yeas akaturikidzana pazvinogoneka, sezvo ivo vachiwanzoda mashoma ekugadzira matanho. Pakuchera-shure, dzikamisa kushandiswa kwayo kune yakakosha mitsetse yechiratidzo kudzivirira yakawandisa mitengo yekugadzira.

5. Kugadzirisa Crosstalk Beyond the Basics

Kungotora nzvimbo dzakaparadzana hakuwanzo kukwana kudzikamisa crosstalk, kunyanya sezvo mafambiro achikwira uye bhodhi rezvivakwa rinowedzera kushomeka.

• Kufamba Nenzira Yakatarwa Pakati Pezvikamu : Paunenge uchifamba nezvikamu zvakasiyana-siyana, famba nezviratidzo zvakakosha zvakananga kune mumwe nemumwe pazvikamu zviri pedyo kuti uderedze kubatana kwemagetsi. Semuenzaniso, kana chiratidzo chikafamba chakatarwa pachikamu 1, zvakanaka kuti chimhanye chakamira pachikamu 2.

• Nzira Dzekuchengetedza Masaini Ekukurumidza : Kunyange zvazvo nzira dzekuchengetedza dzichishandiswa zvakanyanya, hadzishande kana dzisina kugadzikwa zvakanaka. Gara uchibatanidza nzira dzekuchengetedza nepasi rakasimba uchishandisa ma-vias kumativi ese uye pamwe chete nenzira kuti ugadzire nhoo inoshanda yezviratidzo zvekukurumidza.

6. Yepamberi Impedance Kudzora kune Yakasanganiswa-Siginecha Dhizaini muSekete Board Layout

Mune redunhu bhodhi dhizaini yeakasanganiswa-chiratidzo madhizaini, uko analog uye masaini edhijitari anogara, kubata impedance control kwakakosha kuti uve nechokwadi chekuvimbika kwechiratidzo. Iwo akasiyana impedance anodiwa edhijitari uye analog masaini anoita kuti zviome kudzivirira crosstalk, ruzha, uye chiratidzo chekuratidzira. Kunzwisisa uye kugadzirisa akasiyana impedance marudzi anogona kubatsira vagadziri kuderedza kupindirana pakati peanalog nedhijitari madomasi uye kuchengetedza kujeka kwechiratidzo.

Mhando dzeImpedance muMixed-Signal Circuit Board Layout

1. Hunhu Impedance
   Characteristic impedance ndiyo inherent impedance yetambo yekufambisa, inotemerwa nehukuru hwayo hwemuviri uye zvimiro zvezvinhu zvakatenderedza. MuPCB dhizaini, kuchengetedza hunhu impedance kwakakosha kune yakakwirira-kumhanya masaini kudzivirira masaini kuratidza. Hwaro hwemazuva ese i50 ohms pakutsvaga-inogumira uye 100 ohms kune akasiyana mapeya. Consistent hunhu impedance pamwe nemateki inobatsira kuve nechokwadi chekuvimbika kwechiratidzo, kunyanya mumasaini edhijitari uye yakakwirira-frequency application.
2. Differential Impedance
   Differential impedance yakanangana neakapetwa masaini, seaya anoshandiswa mu USB, HDMI, kana Ethernet, uko masaini anotumirwa kune maviri makondakita. Ndiyo impedance yakayerwa pakati pemakondakita maviri sepairi, kazhinji kutenderedza 100 kusvika 120 ohms. Kunyatsodzorwa kusiyanisa impedance inovimbisa kushoma chiratidzo skew uye inochengetedza kuwiriranisa pakati pezvikwangwani zviviri, zvakakosha kune yakakwirira-kumhanya data kutendeseka.
3. Imwe-Ended Impedance
   Imwe-inogumira impedance inoshanda kune inoteedzera iyo chiratidzo chinofamba pane imwechete conductor zvine chekuita nereferensi yepasi. Izvi zvakajairika mumaseketi eanalog uye anononoka masaini edhijitari. Imwe-inogumira impedance inowanzo kunanga kwakatenderedza 50 ohms, uye kuchengetedza iyi impedance kwakakosha kudzikisa kurasikirwa kwechiratidzo uye maratidziro ekujekesa, kwakavimbika chiratidzo chekufambisa.
4. Common Mode Impedance
   Common mode impedance inomiririra iyo impedance inoonekwa neyakajairwa-modhi chiratidzo pakati pemakondakita maviri ane hukama nepasi. Mumisanganiswa-chiratidzo dhizaini, iyi mhando inonyanya kukosha kana uchibata electromagnetic interference (EMI) uye ruzha coupling. Yakakwira yakajairika-modhi impedance inobatsira kudzikisa ruzha mumasekete anonzwisa analog nekudzvanya zvisingadiwe zvakajairika-modhi masaini.
5. Controlled Impedans
   Controlled impedance inoreva dhizaini nemaune uye manejimendi ehunhu, mutsauko, uye imwechete-inopera impedances. Izvo zvakakosha kune yakakwira-frequency maseketi, sezvo kunyangwe diki impedance mismatches inogona kutungamira kune chiratidzo chekuratidzira uye kurasikirwa. Inodzorwa impedance inowanikwa kuburikidza nehupamhi hwekutevera hupamhi, nzvimbo, uye dhizaini stack-up gadziriso, kazhinji inosimbiswa nemidziyo yekufananidza.
6. Impedans Matching
   Impedance yekufananidza inosanganisira kugadzirisa iyo impedance yekuremedza kuti ienderane neiyo sosi impedance, kudzikisa kuratidzwa pane interface pakati pezvikamu kana maseketi. Iyi pfungwa inonyanya kukosha muRF uye yakakwira-kumhanya dhizaini dhizaini, uko impedance mismatches inogona kukanganisa kuita. Nekufananidza impedances, vagadziri vanogona kuve nechokwadi chekufambisa kwesimba kwakanyanya uye kushomeka kwechiratidzo kurasikirwa.

Dedicated Ground Planes neTight Coupling

Kudzivirira yakakwirira-frequency yedhijitari ruzha kubva pakukanganisa masaini eanalogi, dhijitari uye analogi pasi ndege dzinowanzo kupatsanurwa mumisanganiswa-chiratidzo chedunhu redhisheni marongero. Nekudaro, ndege idzi dzinofanirwa kutungamirwa nemazvo kudzivirira nyaya dzakaita senge pasi zvishwe uye impedance discontinuities.

• Akaparadzana asi Akabatana Ground Ndege: Sezvineiwo, isa dhijitari uye analog pasi ndege padyo nepedyo nekubatana kwakasimba kudzora ruzha pasina kukonzera impedance kusawirirana. Iyi dhizaini inoderedza kugona kwepasi loop uku ichipa nzira dzekudzoka dzakakwana. Shandisa ma stitching capacitor kuyambuka miganhu kuti uve nechokwadi chekuenderera kune masaini epamusoro-frequency.
• Single Unified Ground Plane ine Isolation: Mukushandisa-mutsindo wakaderera, ndege imwe chete yepasi inogona kushanda kana zvikamu zvega zvakasikwa kudzivirira zvikamu zveanalogi kubva kune ruzha rwedhijitari. Iyi nzira inogona kurerutsa dhizaini uye kuchengetedza nzvimbo, asi inoda kunyatsoteedzera kuratidza inoshanda impedance yekufananidza uye ruzha rwega.
• Simulation yeImpedance Matching: Shandisa electromagnetic (EM) simulation maturusi kuongorora maitiro endege yepasi, kunyanya mabatiro anoita ndege dzakabatana-pedyo uye kukanganisa kwechiratidzo chekutendeka. Kutevedzera dhizaini kunobatsira kuona zvingangoita impedance mismatches uye inobvumira gadziriso isati yagadzirwa.

Stub Minimization muDifferential Pairs

Mapaya akasiyana, anowanzo shandiswa pakumhanyisa data data, anonyanya kutarisisa kune impedance mismatches, izvo zvinogona kutungamira mukuora kwechiratidzo. Via stubs, kana zvikamu zvisina kushandiswa zvevias, zvinogona kugadzira impedance discontinuities izvo zvinokanganisa masaini masaini.

• Back-Drilling kuti Bvisa Stubs: Via stubs ita seantennas, kuunza zviratidziro zvisingadiwe zvinokanganisa mutsauko wechiratidzo. Shandisa back-drilling kuti ubvise yakawandisa kuburikidza nezvinhu, kunyanya kune data reti pamusoro pe5 Gbps. Izvi zvinoderedza impedance mismatches, kuchengetedza kujeka kwechiratidzo uye kuderedza ruzha mukumhanya-mhanya.
• Optimized Routing for Differential Pairs: Mumisanganiswa-masaini madhizaini, zvakakosha kuti uchengetedze inowirirana nzvimbo uye inodzorwa impedance pamwe chete akasiyana mapeya. Deresa shanduko ye layer kuti uderedze kudiwa kweimwe vias, sezvo imwe neimwe shanduko inosuma inogona kuita stubs. Kana shanduko yedhiri ichidikanwa, kuchera-kudzika kwakadzika kunogona kubatsira kudzikisa kureba kwestub pasina kuda kudhirowa kwakazara.

Zvimwe Zviitiko Zvakanakisisa zveImpedance Control muMixed-Signal Circuit Board Layouts

• Dzivisa Kupindirana Simba uye Ground Planes: Kuisa ndege dzemagetsi edhijitari zvakananga pamusoro peanalog pasi ndege zvinogona kugadzira coupling capacitance, zvichibvumira ruzha kupararira muzvikamu zveanalogi. Chengetedza ndege idzi dzakapatsanurwa zvakadzika uye zvakachinjika kudzivirira kubatanidza kusingatarisirwe munzvimbo dzakaoma analogi.
• Shandisa Guard Traces uye Shielding Techniques: Isa nzvimbo dzevarindi dzakadzika kana nhovo dzakatenderedza zvakakosha analogi zvikamu kuti uwedzere kuzviparadzanisa kubva kune ruzha rwedhijitari. Munzvimbo dzine ruzha rwepamusoro, kuwedzera kudira kwemhangura kwakabatana nevhu kwakatenderedza analog traces kunopa imwe dziviriro kubva kuEMI uye crosstalk.
• Yakabatanidzwa Impedance Kudzora mune Akaturikidzana Vias: Kune madhizaini ane yakakwirira-density zvinhu zvinoda akaturikidzana vias, chengetedza impedance kuenderera nekugadzirisa iyo anti-pad saizi yakatenderedza imwe neimwe kuburikidza kudzivirira capacitive kurodha. Iyi tekinoroji inonyanya kukosha kumabhodhi anoda compact marongero pasina kukanganisa chiratidzo chekuvimbika.

Kugadzirisa impedance zvine mutsindo musanganiswa-chiratidzo chedunhu bhodhi marongero kwakakosha kuti uwane yakasimba chiratidzo chekuvimbika uye kuderedza kupindirana pakati peanalog nedhijitari madomasi. Nekushandisa matekiniki akadai sendege dzepasi dzakasimba dzakasimba, kuchera kumashure kudzikisa stubs, uye optimize nzira yekusiyanisa vaviri vaviri, vagadziri vanogona kusimudzira mashandiro ePCB yavo yakasanganiswa-chiratidzo. Nekungwarira impedance kudzora, unogona kugadzira emhando yepamusoro mabhodhi anosangana neakaomesesa maitiro ekuita, kuve nechokwadi chekushanda kwakavimbika pane dzakasiyana siyana dzekushandisa. Semugadziri wePCB & PCBA, tinopa hunyanzvi uye humbowo hunodiwa kuti uwane aya epamberi impedance control strategy, tichikubatsira kuunza yako yakasanganiswa-signal madhizaini kumusika nechivimbo.

7. Mafungiro eDFM: Kunyatsogadzirisa Nyaya Dzekuita

Vagadziri vanowanzo furatira manufacturability kusvika pakupera kwemaitiro ekugadzira, zvichikonzera kunonoka kwekugadzira uye kugadzirisa zvakare kunodhura.

• Kudzivirira Kushivirira Kwakanyanya : Vagadziri vePCB vanogona kunetseka nekushivirira zvishoma nezvishoma uye nzvimbo. Dzivisa kusundira miganhu kunze kwekunge zvichidikanwa, uye bvunza mugadziri wako kuti unzwisise kugona kwavo. Kurerutsa kushivirira kunogona kuvandudza goho uye kuderedza mitengo pasina kukanganisa mashandiro mumagadzirirwo mazhinji.

• Kudzivirira Makona Akapinza : Makona emukati akapinza pamapedhi kana zvidimbu zvinogona kukonzera kushushikana, zvichikonzera kutadza kushanda kwebhodhi nekufamba kwenguva. Shandisa makona akatenderera, kunyanya pamachekwa nenzvimbo hombe dzemhangura, kuti uwedzere kugara kwenguva refu kwemuchina uye kudzivirira matambudziko ekugadzira.

8. Simulation uye Kuedza: Kushandisa Pre-Kugadzira Verification Maturusi

Kukosha kwekufananidza kunowanzo tarisirwa kushomeka, asi kusati kwagadzirwa kuyedzwa kunogona kudzivirira nyaya zhinji kubva mukutadza kwemunda.

• Kutevedzera Simba Rakanaka : Kunze kwekuiswa kwe capacitor yekubatanidza magetsi, tevedzera network yese yekugovera magetsi (PDN) kuti uone nzvimbo dzinopisa, kudonha kwemagetsi kwakawandisa, kana matambudziko e resonance. Zvishandiso zvakaita sePowerSI zvinogona kupa ruzivo rwekuti magetsi anoyerera sei muzvikamu, zvichiratidza nzvimbo dzisina kusimba usati wagadzira prototyping chaiyo.

• Kutevedzera Kupisa Nekushushikana Kuti Uvimbike : Mumagadzirirwo ane density yakawanda kana kuti ane simba guru, kushushikana kwekupisa kunogona kuungana nekufamba kwenguva, zvichikanganisa kuvimbika kwebhodhi. Zvishandiso zvakaita seAnsys SIwave kana Altium's thermal simulation zvinogona kutevedzera kugoverwa kwekupisa pakati pezvikamu, zvichikubvumidza kugadzirisa marongero kuti uderedze nzvimbo dzinopisa kana njodzi dzekukombama.

mhedziso

Inoshanda redunhu bhodhi dhizaini dhizaini inodarika miitiro yakajairika; zvinosanganisira kuita sarudzo dzehungwaru kudzivirira njodzi dzakajairika dzinogona kukanganisa mashandiro, kuvimbika, uye mutengo. Nekuisa pamberi pekufunga kwepamberi senge yekudzoka nzira manejimendi, simba rekuvimbika, chiyero chekupisa, uye manufacturability, vagadziri vanogona kugadzira yakasimba, yepamusoro-inoshanda edunhu mabhodhi.

KuHighleap Electronics, PCB yakavimbika uye PCBA mugadziri, tinoziva kuti idzi hunyanzvi hunyanzvi hwakakosha kuchengetedza nguva nezviwanikwa uku uchiwedzera kuvimbika kwechigadzirwa. Kuzvipira kwedu kumhando uye hunyanzvi hunovimbisa kuti zvigadziriso zvako hazvingosangana chete asi zvinopfuura zviyero zveindasitiri. Rega isu tive shamwari yako mukushandura mazano ako kuita zvigadzirwa zvakasarudzika, kuendesa kuvimbika uye kuita zvinotarisirwa nevatengi vako mumakwikwi emazuva ano.