7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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linh kinCu Diode RB152/DiscreteRc cm 2 chn CON2/ConnectorT phn cc Capacitor pol/DiscreteDiode zener Diode zener/Discretein tr R/DiscreteQuang tr R2/DiscreteBin tr Resistor var 2/DiscreteTransistor2N3904/TransistorTriac T2323/DiscreteChn Mass 0/SourceII - Thit k s mch nguyn l bng Capture CIS to s nguyn l, ta s dng chng trnh Capture CIS ca OrCAD 9.2. Chn Start> Aily Release 9.2> Capture CIS

Trn ca s OrCAD Capture CIS va xut hin, ta nhp chut vo Menu File > New > ProjeHp thoi New Project hin ln, nhp vo tn s nguyn l s v ti khung Name, ri nhn Create a New Project Using v ti phn Location n nt Browse... la chn ng d

ly linh kin, nhp chn Place > Parthay t hp phm Shift + P trn bn phm

Hp thoi Place Part xut hin, tin hnh ly nhng linh kin trong th vin ra, nhp chut vary

Hp thoi Browse File xut hin, ti khung Look in nhp chut vo mi tn hng xung Orcad. Ti khung bn di chn mc Discrete. Chn xong nhp Open.

Hp thoi Place Part li xut hin, ti khung Libraries thy xut hin ,mc DISCERTE, nhpkhung Part nhp chut vo thanh cun bn phi, nhp chn tn R. chn xong nhn OK. Di chnh lm vic v nhp chut ra nhng v tr khc nhau chn v tr v s lng cn thit.

7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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ly cc linh kin khc ta lm tng t:- Quang tr > nhp chn R2 Part sau nhn OK, di chuyn con lm vic nhp chn v tr lm vic

- Bin tr > nhp chn RESISTOR VAR 2 Part sau nhn OK, n tr ra mn hnh lm vic nhp chn v tr lm vic

- Cu DIODE > nhp chn R152 Part sau nhn OK, di chuyn chn v tr lm vic

7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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- T phn cc > nhn chn CAPACITOR POL Part sau nhn OKhnh lm vic nhp chn v tr lm vic

- DIODE ZENER > nhn chn DIODE ZENER Part sau nhn OK, di chuylm vic nhp chn v tr lm vic

- TRIAC > nhn chn T2323 Part sau nhn OK, di chuyn con tr nhp chn v tr lm vic

Tng t nh trn ta chn thm th vin Connecter

7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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Hp thoi Place part xut hin, ta khung Libraries ta chn CONNECTER . ly rc cm 2N2 trong Part, ri nhn OK, a con tr ra khi mn hnh lm vic, nhn chn v tr linh ki

Ta tip tc ly thm th vin Transistor.

ly Transistor ta lm tng t nh trn nhng vi th vin l Transistor va thm

ly chn Mass ta nhp chn biu tng

Tip ta chn :

7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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Sau khi ly cc linh kin ra v sp xp (trong qu trnh sp xp c th xoay linh kin bnbc i dy cho mch nguyn l. C th chn Place > Wire hoc dng biu tng trn th

Tip theo ta tin hnh t cc cp ngun v ni t theo s . Chn Place > Power (hoc G). Chn biu tng thch hp ri n OK v tin hnh t (ni) vo mch in.

Cui cng ta c c s nguyn l hon chnh:

c th chuyn sang bc v mch in bng Layout Plus, ta cn phi to file *.mnl trc. h tm thu mn hnh lm vic li. Chn file mch s nguyn l bn ca s qun lcheck trn thanh cng c kim tra s nguyn l. Hp thoi Design rule check xut

a. Nu OrCAD thng bo li, th cn phi m file va v ln sa li cho ng; nu khngist trn thanh cng c. Hp thoi Create Netlist xut hin, ta chn tab Layout v n BrowsNetlist File xc nh ch lu file *.mnl (ta thng mc nh vic qun l cc file d*.mnl.

III - Thit k mch in bng Layout PlusM phn mm Layout Plus tng t nh khi m phn mm Capture CIS. Sau khi mn hnh File > New. Hp thoi Load Template File xut hin, bn trong hp thoi ny l danh sch cta thng chn lun file mc nh DEFAULT.TCH ri n Open

Hp thoi Load netlist suorce xut hin. Trong hp thoi ny ta chn tp tin *.mnl to ra, ri n Open. Lc ny hp thoi Save File As s xut hin v yu cu nhp tn lu bn m

Nu nhng linh kin ln u c s dng th s xut hin bng Link footprint to compomeTa c th n chn Link existing footprint to compment ... chn chn c sn trong cc

Hoc c th t to chn linh kin mi hay chnh sa cc linh kin c sn bng cch n vo dint library ...Khi n Create or modify footprint library ... mt ca s mi xut hin. Ta c th chn cc lii hoc c th n Create New Footprint to chn mi. Lc ny mn hnh xut hin h

7/31/2019 BO CO THC TP C BN THIT K MCH IN S DNG PHN MM ORCAD

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Sau khi nhp xong ta n OK tin hnh v. v chn , ta s dng thanh cng c c sv.v. Sau khi v xong ta n Save. Ri n Browse chn th vin lu file v n OK hon

Sau khi vic chn chn cho cc linh kin hon tt, trn mn hnh s xut hin ton b hnni linh kin.

Tip theo ta nhy chut vo cng c Reconector Mode n i cc ng dy vng, trnv tr cc linh kin.

xa bt cc ch, k hiu khng cn thit, ta nhy vo biu tng Text Tool ri chn c

Nhy chut vo biu tng Component Tool di chuyn, sp xp cc chn linh kin. Bnhng iu kin quan trng quyt nh ti cht lng, kh nng chng nhiu, tnh thm mlp, .... Ngoi ra c n c s tham gia ca cc yu t yu cu v kch thc mch, yu cu hin mch nhiu lp, v...v.... Trong qu trnh di chuyn, c th nhn phm R trn bn phm gc 90o.

Tip theo l chn lp v mch in. Nhy biu tng View Spreadsheet sau chn Strateg

thoi Route Layer xut hin, ti mc Enabled nhp chn cc lp ko v mch in, sau nhperties, b du nh trong Routting Enabled ri n OK.

Nhp chut vo biu tng Obstacle Tool v khung cho mch in. Con tr thay i hnhko di n cc im khc v cho n khi hnh thnh khung cho mch in.

Chn lnh Auto > Autoroute > Board dy mch in t ng chy. Sau hp thoi tng bip tc. Lc ny ta cn nhn li mch v kim tra xem c n ng dy vo cha c chymnh). Nu c ta cn phi chn Auto > Unroute > Board, b cc ng dy v tin hnh

a tip tc thc hin bc ph MASS cho mch.

Do mch c nhiu ng tn hiu nn vic ph MASS cho mch va lm mch chc chn, cra mch nhanh. Ta dng cng c Obstacle Tool, nhy chut tri vo ng vin bao ngoi

Properties. Trong hp thoi Edit Obstacle mi xut hin, ta ln lt la chn :Chn Obstacle Type l Copper pourObstacle Layer l TOPClearance l khong cch gia cc ng v phn ph ng, y chn 15Net Attachment chn l GND_POWER nu mun ph MASS, nu mch khng c mass ta n OK hon tt.

IV- Kt LunThc tp l thi gian m em c hc hi c rt nhiu kinh nghim m trn l thuyt e khnnhiu iu v in t v cc mch in t, v t by gi em c th t thit k cho mnh

Cui cng em xin cm n thy tn tnh gip em hon thnh bi thc hnh ny.Sinh vinNguyn Ngc Tn Hng