I. Kutanga

Nzira dzekudzivisa kupindira pane Pcb bhodhi vari:

1. Deredza nzvimbo yekusiyanisa modhi chiratidzo loop.

2. Deredza kudzoka kweruzha rwepamusoro (kusefa, kuzviparadzanisa uye kuenzanisa).

3. Deredza iyo yakajairika mode voltage (grounding design). 47 nheyo dzepamusoro-kumhanya PCB EMC dhizaini II. Pfupiso yePCB dhizaini misimboti

Nheyo 1: PCB wachi frequency inodarika 5MHZ kana chiratidzo chekusimuka nguva isingasviki 5ns, kazhinji inoda kushandisa akawanda-layer board dhizaini.

Chikonzero: Iyo nharaunda yechiratidzo loop inogona kudzorwa zvakanaka nekutora akawanda-layer board dhizaini.

Nheyo 2: Kune akawanda-layer mabhodhi, makiyi wiring layer (iyo mitsara uko mitsara yewachi, mabhazi, mitsara yechiratidzo, mitsara yeredhiyo, reset mitsara yechiratidzo, chip sarudza mitsara yechiratidzo, uye akasiyana mitsara yechiratidzo chekudzora iripo) inofanira kunge iri padhuze. kundege yepasi yakakwana. Kunyanya pakati pendege mbiri dzepasi.

Chikonzero: Mitsetse yakakosha yechiratidzo inowanzosimba nemwaranzi kana mitsara yechiratidzo yakanyanyisa. Wiring padyo nendege yepasi inogona kudzikisa chiratidzo loop nzvimbo, kuderedza kusimba kwemwaranzi kana kunatsiridza anti-kupindira kugona.

Nheyo yechitatu: Pamabhodhi e-single-layer, mativi ese emitsara yemasaini akakosha anofanirwa kuvharwa nevhu.

Chikonzero: Chiratidzo chekiyi chakafukidzwa nevhu pamativi ese, kune rimwe divi, chinogona kuderedza nzvimbo yechiratidzo loop, uye kune rumwe rutivi, inogona kudzivirira crosstalk pakati pemutsara wechiratidzo nemimwe mitsara yechiratidzo.

Nheyo 4: Kune kaviri-layer bhodhi, nzvimbo hombe yepasi inofanirwa kuiswa pane yekufungidzira ndege yekiyi yechiratidzo mutsara, kana yakafanana nebhodhi-rimwe divi.

Chikonzero: zvakafanana neicho chiratidzo chikuru chebhodhi re multilayer iri pedyo nendege yepasi.

Nheyo yechishanu: Mune bhodhi re multilayer, ndege yemagetsi inofanira kudzoserwa ne5H-5H maererano nendege yepasi iri padyo (H ndiyo chinhambwe pakati pemagetsi uye ndege yepasi).

Chikonzero: The indentation of the power airport inoenderana neayo kudzoka pasi ndege inogona kunyatso kudzvanya kumucheto kweradiation dambudziko.

Nheyo yechitanhatu: Iyo fungidziro yendege yewiring layer inofanira kunge iri munzvimbo yereflow plane layer.

Chikonzero: Kana iyo wiring layer isiri munzvimbo yekufungidzira yeiyo reflow plane layer, inokonzeresa matambudziko eradiation uye kuwedzera iyo chiratidzo loop nzvimbo, zvichikonzera kuwedzera kusiyanisa mode radiation.

Chisungo chechinomwe: Mumabhodhi e-multi-layer, hapafanirwe kuve nemitsara yezviratidzo yakakura kudarika 7MHZ paTOP neBOTTOM layers yebhodhi rimwechete. Chikonzero: Zvakanakisa kufamba iyo yakakwirira-frequency chiratidzo pakati pezvikamu zviviri zvendege kudzvanyirira mwaranzi wayo kunzvimbo.

Nheyo yechisere: Pamabhodhi ega ane bhodhi-level inoshanda frequency yakakura kupfuura 8MHz, kana yechipiri layer uye peultimate layer iri wiring layer, iyo Yepamusoro uye Boottom layers inofanirwa kuvharwa neyakagadzika foil yemhangura.

Chikonzero: Zvakanakisa kufamba iyo yakakwirira-frequency chiratidzo pakati pezvikamu zviviri zvendege kudzvanyirira mwaranzi wayo kunzvimbo.

Nheyo 9: Mune bhodhi yakawanda, iyo huru yekushanda simba ndege (inonyanya kushandiswa simba ndege) yebhodhi imwe chete inofanira kunge iri pedyo nendege yayo yepasi.

Chikonzero: Ndege yemagetsi iri padyo nendege yepasi inogona kunyatso kudzikisa loop nzvimbo yedunhu remagetsi.

Chisungo chegumi: Mune imwe-layer board, panofanirwa kuve newaya yepasi padivi uye inofambirana neiyo magetsi trace.

Chikonzero: kuderedza nzvimbo yemagetsi ekupa ikozvino loop.

Chisungo 11: Mune kaviri-layer board, panofanirwa kuve newaya yepasi padivi uye inofambirana neiyo magetsi trace.

Chikonzero: kuderedza nzvimbo yemagetsi ekupa ikozvino loop.

Musimboti 12: Mukugadzira dhizaini, edza kudzivirira ari padhuze wiring layer. Kana zvisingadzivisiki kuti mitsara ye wiring iri pedyo kune imwe neimwe, nzvimbo yepakati pakati pezvikamu zviviri zve wiring inofanira kuwedzerwa zvakakodzera, uye nzvimbo yepakati pakati petambo ye wiring uye chiratidzo chayo chechiratidzo chinofanira kuderedzwa.

Chikonzero: Parallel signal traces pane ari padyo wiring layers inogona kukonzera chiratidzo crosstalk.

Musimboti 13: Ari padyo nendege akaturikidzana anofanirwa kudzivirira kupindirana kwendege dzadzo dzekufungidzira.

Chikonzero: Kana mafungidziro apindirana, iko kubatanidza capacitance pakati pematanho inokonzeresa ruzha pakati pezvikamu kuti zvibatane.

Chisungo 14: Paunenge uchigadzira iyo PCB dhizaini, nyatso cherechedza iyo dhizaini musimboti wekuisa mumutsara wakatwasuka pamwe nechiratidzo chekuyerera kwechiratidzo, uye edza kudzivirira kutenderera nekudzoka.

Chikonzero: Dzivisa zvakananga chiratidzo chekubatanidza uye kukanganisa chiratidzo chemhando.

Nheyo 15: Kana akawanda module maseketi akaiswa paPCB imwechete, maseketi edhijitari uye analogi maseketi, uye yakakwirira-kumhanya uye yakaderera-kumhanya maseketi anofanirwa kuiswa akaparadzana.

Chikonzero: Dzivisa kupindirana pakati pemaseketi edhijitari, maseketi analogi, maseketi anomhanya-mhanya, uye maseketi anomhanya-pasi.

Nheyo 16: Kana paine matunhu akakwirira, epakati, uye akaderera-speed pabhodhi redunhu panguva imwe chete, tevera matunhu akakwirira uye epakati-kumhanya uye ugare kure neiyo interface.

Chikonzero: Dzivisa yakakwirira-frequency yedunhu ruzha kubva pakupenya kuenda kunze kuburikidza neiyo interface.

Nheyo 17: Kuchengetedzwa kwesimba uye yakakwirira-frequency filter capacitors inofanira kuiswa pedyo neunit circuits kana midziyo ine shanduko huru dzemazuva ano (zvakadai semagetsi emagetsi emagetsi: mapeji ekupinza uye ekubuda, mafeni uye relays).

Chikonzero: Kuvepo kwesimba rekuchengetedza capacitors kunogona kuderedza loop nzvimbo yeazvino zvishwe.

Nheyo 18: Iyo sefa yedunhu remagetsi ekuisa chiteshi chebhodhi redunhu rinofanira kuiswa padyo neiyo interface. Chikonzero: kudzivirira mutsara wakasefa kubva pakubatanidzwa zvakare.

Nheyo 19: PaPCB, kusefa, kudzivirira uye kuzviparadzanisa zvikamu zveiyo interface wedunhu inofanira kuiswa padyo neiyo interface.

Chikonzero: Inogona kubudirira kubudirira mhedzisiro yekudzivirira, kusefa uye kuzviparadzanisa nevamwe.

Nheyo yechi20: Kana paine zvese sefa uye dunhu redziviriro pane interface, musimboti wekutanga kudzivirira uyezve kusefa kunofanirwa kuteverwa.

Chikonzero: Dunhu redziviriro rinoshandiswa kudzvanya ekunze overvoltage uye overcurrent. Kana dunhu rekudzivirira rakaiswa mushure mesefa yedunhu, iyo sefa yedunhu ichakuvadzwa ne overvoltage uye overcurrent.