bai tap orcad
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B GIO DC V O TOTRNG I HC GIAO THNG VN TI - C S II
BI TP MN HC: TIN HC K THUT
TI: THIT K MCH IN BNG PHN MMORCAD
GVHD : TH.S V THIN LNHSVTH : NGUYN DUY MULP : KTVT- K50NHM : 14
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Bo co orcad GVHD:Th.s v Thin Lnh
BI
V s mch in mch ngun da trn s nguyn l sau:
Yu cu : v c mch nguyn l, t v c mch in. Nm vng kin thc cbn v orcad. Lm m hnh linh kin thc t t boar ng..Kt qu : trnh by trn word cc bc tin hnh .
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Bo co orcad GVHD:Th.s v Thin Lnh
Mt s linh kin chnh trong mch
IC n p 7805 a in p ra +5V IC n p 7812 a in p ra +12V
IC n p 7905 in p ra -5V IC n p 7912 a in p ra -12V
1 2 3
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Bo co orcad GVHD:Th.s v Thin Lnh
PHN MT:V S NGUYN L CA MCH khi ng phn mm orcad tin hnh thc hin nh sau:Vo StartProgrameOrcad Family Release9.2Capture
Khi thc hin xong cc bc trn mn hnh orcad s xut hin:
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Bo co orcad GVHD:Th.s v Thin Lnh
Trn mn hnh Orcad Capture tin hnh chn File NewProject.
lc ny mn hnh s xut hin hp thoi New project. Ti khung New project nhpchn muc PC Board Wizard. Ti khung Name nhp tn cn t cho mch in. ti
khung Location l ng dn m s mch c lu
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Bo co orcad GVHD:Th.s v Thin Lnh
Khi ta v chng trnh s to ra rt nhiu file con b tr nn tt nht ta nn to ringcho mi mch mt folder bng cch nhp chut vo Browse.. th select directory xuthin
Chon Create dir... th Create directory xut hin ta vit tn folder mi vo y richn OK
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Nhp tn chomch
V tr lus mch
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Bo co orcad GVHD:Th.s v Thin Lnh
Sau khi nhn OK. Hp thoai PCB Project Wizard xut hin.Nhn Next tip tc.
Nu s dng quen th vin ca Orcad ta s bit tt c nhng linh kin trn nm trongcc mc Connector, Discrete, Counter, MiscLinear. V th ta nhp chn nhng mc
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Vittnmchvoy
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Bo co orcad GVHD:Th.s v Thin Lnh
ny ri nhn chut vo nt Add ln lt tng mc mt trn hp thoi PCB ProjectWizard.Ta c nh hnh sau:
Nhn Finish kt thc vic chn th mc cha linh kin cn cho v mch
Theo s nguyn l ta cn phi ly
1Cu DIODE9 T IN phn cc1 BIN TR1 IN TR1 IC LM 3171 IC 79121 IC 79051 IC 78121 IC78051 LED
1 DIODE15 tip mt , chn cm CON2 v CON3
Trn thanh cng c bn phi nhp chut vo v tr
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Bo co orcad GVHD:Th.s v Thin Lnh
Trn mn hnh s xut hin ca s
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Ly linh kin
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Bo co orcad GVHD:Th.s v Thin Lnh
Nu th vin cn thiu ta nhp chut vo Add library... th mi xut hin ta ly th vinno th nhp chut vo ri bm OK
Khi th vin ta ly linh kin bng cch vit tn linh kin vo Place Part
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Bo co orcad GVHD:Th.s v Thin Lnh
Sau nhn ok. Linh kin c ly ra c trong trang v mch. Ly s lng vmch.mun ngng vic ly linh kin hin ti th nhp chut phi End more hoc nhnEsc t bn phm.Lm tng t vy ta c c linh kin cn cho mch v :
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Nhp tn hoc k tu tin ca linh kin
NgunCON2
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Bo co orcad GVHD:Th.s v Thin Lnh
Tng t vi cc linh kin khc :
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T phn cc c
n led
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Bo co orcad GVHD:Th.s v Thin Lnh
c nh vy ta chn cc linh kin :
ly in tr ta g ch R2 vo v tr Part, Sau nhp chut vo ok bn phi ca s.
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Cu diode
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Bo co orcad GVHD:Th.s v Thin Lnh
ly bin tr ta g RESISTORVAR sau ta chn dng RESISTORVAR/DISCRETEri nhp ok
Ly tip mt cho mch ta nhp chut vo v tr GND ca thanh cng c bn phi khi trn mn hnh s xut hin ca s, ta chn 0/SOURCE ri nhn ok
ly IC LM 317 ta g LM317 vo v tr PART sau nhp ok
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Bo co orcad GVHD:Th.s v Thin Lnh
ly IC7912 ta g UA7912 vo v tr PART sau nhp ok
ly IC7905 ta g UA7905 vo v tr PART sau nhp ok
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Bo co orcad GVHD:Th.s v Thin Lnh
ly IC 7805 ti v tr PART ta g UA7805 sau nhp ok
ly IC7812 ti v tr PART ta g UA7812 sau nhp ok
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Bo co orcad GVHD:Th.s v Thin Lnh
Khi chn xong cc linh kin trn trang thit k.
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Bo co orcad GVHD:Th.s v Thin Lnh
Vo place wire trn thanh linh kin , sau thc hin ni bng cch nhp chut vo chnlinh kin th nht (im u) v di con tr ti chn linh kin th hai m ta cn ni vnhp chut vo (im cui)
C nh vy ta sp xp linh kin cho hp l ri ni cc chn li vi nhau c s honchnh .
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imu
im
cui
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Bo co orcad GVHD:Th.s v Thin Lnh
kim tra li cho s nguyn l v chuyn sang s mch in nhp chut vo biutng Minimize gc phi pha trn mnhnh:
Mn hnh xut hin, ti khung bn tri nhp vo FAGE1, ri sau nhp vo biu tngDRC trn thanh cng c kim tra li.
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Bo co orcad GVHD:Th.s v Thin Lnh
Hp thoi DRC xut hin, nhp p vo Ok tin hnh kim tra nu khng thy bo lig l mch khng c li.
Tip tc to tp tin c ui .mnl thit k mch in nhp vo tools ri chn create netlist.
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Bo co orcad GVHD:Th.s v Thin Lnh
Hp th create netlist xut hin chn layout ri chn OK.
Ta c th thay i v tr lu file .MLN bng cch nhp chut vo Browse ri chn mtth mc khc
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ng dn lufile .MNL
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Bo co orcad GVHD:Th.s v Thin Lnh
PHN HAI:V BOARD BNG LAYOUT PLUS
Chn start -> all programs -> chn orcad -> layout plus
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Bo co orcad GVHD:Th.s v Thin Lnh
Khi ng layout plus xong ta chon file -> new m 1 file mi
Hp thoi load template file xut hin , ti mc file name chn ti ng dnC:\Program Files\Orcad\Layout_Plus\Data\DEFAULT.TCH ri nhp p vo open
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Bo co orcad GVHD:Th.s v Thin Lnh
Hp thoi load netlist source xut hin nhp chn ti folder c cha file .MNL ri nhpvo open
Hp th save file as xut hin, nhn nt save
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Bo co orcad GVHD:Th.s v Thin Lnh
Lin kt n footprintKhi cc linh kin trong mch thit k cha tng lin kt n th vin footprint calayout ln no , hoc l linh kin mi th chng trnh s yu cu ta phi lin kt nfootprint (to chn linh kin trn board mch)
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CLICKCHUT
VO CHNCHN
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Bo co orcad GVHD:Th.s v Thin Lnh
Mt s chn th vin thng dngTo : cha cc linh kin 3 chn vi kch thc hnh dng khc nhauJumper :cha cc linh kin 2 chn vi kch thc hnh dng khc nhauDIP :chn linh kin ca cc loi chp
Saukhi chn chn cho linh kin ta s c c nh hnh di
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Bo co orcad GVHD:Th.s v Thin Lnh
To li v n v oTrn thanh cng c chn Options > chn System setting..
Th System Settings xut hin Dipsplay Units l cc n v o ta chn cino th nhp chut vo . Grids l thng s to li gip ta sp xp linh
kin cho d hn c th chn nh hnh di ri bm Ok
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Bo co orcad GVHD:Th.s v Thin Lnh
Xa cc dy niClick chut vo Reconnect Mode trn thanh cng c. Dy ni cc chn linh kin s n i
Di chuyn linh kin
Dng chut nhp vo linh kin r chng n v tr hp l, mun xoay linh kin th dngphm R, ta nn da vo s nguyn l sp xp linh kin cho hp l khi ta vchng trnh c th v ht cc dy .
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Bo co orcad GVHD:Th.s v Thin Lnh
Sau khi sp xp xong ta kim tra bng cch click vo Design rule check trn thanh cngc.
Chn lp mch in Trn thanh cng c click vo view spreadsheet -> layer.
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Check li
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Bo co orcad GVHD:Th.s v Thin Lnh
Ca s layer xut hin , v mt lp th chn Top l Routing , cn BOTTOM , INNER1,INNER2, click chut phi chn properties...
Ca s mi hin ra chn Unused Routing, ri chn Ok
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Bo co orcad GVHD:Th.s v Thin Lnh
Chn kch thc ng mch inVo View spreadsheet trn thanh cng c chn Nets , ca s Nets xut hin click chutvo Width Min Con Max, click chut tri chn propeties , ca s Edit net xut hin in
kch thc ng mch vo cc mc Min Width (dy nh nht ) Con Width (dy trungbnh ) Max Width (dy ln nht ) .th Net Spacing l khong cch gia cc dy sau nhn Ok v ng hp thoi
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Bo co orcad GVHD:Th.s v Thin Lnh
V khung mch inChn Obstacle tool trn thanh cng c chn v tr thch hp , click chut tri v v khung
in , sau khi v xong , click phi chn End comand kt thc
V mch in t ng
chn Auto -> Autoroute -> Board
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Bo co orcad GVHD:Th.s v Thin Lnh
i cho chng trnh v xong l c
Nu mch xut hin dy mu vng nh hnh di ngha l khng th i dy ht m phini tt hoc phi xp li linh kin
Sp xp li chn linh kinTrn thanh cng c click Auto ->unroute -> Board khi phc li
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Phi nitt hocxp lichn
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Bo co orcad GVHD:Th.s v Thin Lnh
Trn thanh cng c click vo Component tool ri xp li linh kin, spxp xong ta chn Auto -> Autoroute -> Board chng trnh v li mch
Nhng ch khng th v dy t ng ta c th v th cng bng cch click vo EditSegment Mode i li dy
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Bo co orcad GVHD:Th.s v Thin Lnh
Sau khi c boar mch va ta s in mch va v ra giy in bng . ta click vo Optionstrn thanh cng c, chn Post Process Setting ...
Th post process xut hin chn *.BOT , sau click chut phi chn Preview
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Bo co orcad GVHD:Th.s v Thin Lnh
Click vo file chn print/plot...
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Bo co orcad GVHD:Th.s v Thin Lnh
Th print /plot hin ra ta . in en trng th chn Force Black $ White , ri chn OK
Ta c th in lun ra giy bng , nu khng c my in c th xut file ra ui .pdf bngphn mm ring