digital electronics and logic design godse pdf

... from Conceptual to Logical Design, ” focus on the first step in the transition from conceptual design to logical design, which is to identify the creational and structural design patterns that ... Architecture and Structural Design Patterns Lab 2: Architecture and Structural Design Patterns Objectives After completing this lab, you will be able to: ! Choose and apply structural design ... Architecture and Structural Design Patterns Module 2: Architecture and Structural Design Patterns 9 Structural Recordset Fields Field As has been discussed, structural design patterns...

Ngày tải lên: 10/12/2013, 16:16

... entering cui at the command line, but Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Part 1 2D Design Please purchase PDF Split-Merge on www.verypdf.com to remove this ... Internet tools and Design 373 Chapter 20 Internet tools and Help 375 Emailing drawings 376 Creating a web page 377 The eTransit tool 378 Help 379 Please purchase PDF Split-Merge on www.verypdf.com ... intentionally left blank Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Introduction to AutoCAD 2009 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. Contents vi Dynamic...

Ngày tải lên: 24/12/2013, 17:15

Ngày tải lên: 21/01/2014, 23:20

Ngày tải lên: 31/03/2014, 21:22

Ngày tải lên: 05/04/2014, 22:57

Ngày tải lên: 17/03/2014, 17:20

Ngày tải lên: 19/03/2014, 21:20

Ngày tải lên: 01/06/2014, 10:12

... sum of only the previous values of the output and the weighted sum of the current and previous Introduction to Digital Signal Processing and Filter Design, by B. A. Shenoi Copyright © 2006 John ... properties of complex exponential and sinusoidal discrete-time signals are described. A brief history of analog and digital filter design is given. Then the advantages of digital signal processing over ... provide a hands-on experience to the students. Chapter 5 is concerned with the theory and design of finite impulse response (FIR) filters. Properties of FIR filters with linear phase, and design of...

Ngày tải lên: 13/09/2012, 10:21

... Processing, Addison-Wesley, 1989. 7. S. S. Soliman and M. D. Srinath, Continuous and Discrete Signals and Systems, Prentice-Hall, 1990. 8. L. R. Rabiner and B. Gold, Theory and Application of Digital Signal Processing, Prentice-Hall, ... signal, and a discrete-time signal. We dis- cussed the basic procedure followed to sample and quantize an analog signal REFERENCES 31 6. R. D. Strum and D. E. Kirk, Discrete Systems and Digital ... SIGNALS 3 and tracking of targets, missile guidance, secure communications, jamming and countermeasures, remote control of surveillance aircraft, and electronic warfare. 7. Aerospace and Automotive Electronics. ...

Ngày tải lên: 29/09/2013, 21:20

... P.E., and Strader, N.R., VLSI Design Techniques for Analog and Digital Circuits , McGraw Hill Publishing Co., 1990. 2. Sedra, A.S. and Smith, K.C., Microelectronics Circuits , 4 th ... CRC Press LLC and III CFFR =− α (12.3) II I EFRR =− + α (12.4) and ()() III BFFRR =− +− 11 αα (12.5) where I ES and I CS are the base-emitter and base-collector ... for the simple current mirror and Wilson current source. Figure 12.12 Percentage Error between Reference and Output Currents for Simple Current Mirror and Wilson Current Source ...

Ngày tải lên: 13/12/2013, 01:15

... Figure 7.1 General Two-Port Network I 1 and V 1 are input current and voltage, respectively. Also, I 2 and V 2 are output current and voltage, respectively. It is assumed that the ... V 1 and I 1 in terms of the secondary (receiving end) variables V 2 and - I 2 . The negative of I 2 is used to allow the current to enter the load at the receiving end. Examples 7.5 and ... VaVaI 1 11 2 12 2 =− (7.35) IaVaI 1 21 2 22 2 =− (7.36) where V 2 and I 2 are independent variables and V 1 and I 1 are dependent variables. In matrix form, the above two equations...

Ngày tải lên: 13/12/2013, 01:15

Ngày tải lên: 13/12/2013, 03:15

... Inc. 4 LinearlyActingExternalandInternal DrumBrakes Linearlyactingdrumbrakesarethosefittedwithshoeswhich,whenacti- vated,approachthedrumbymovingparalleltoaradiusthroughthecen- teroftheshoe.TypicallinearlyactingdrumbrakesareillustratedinFigures 1–3. Analysisoflinearlyactingbrakesincludesthoseinwhichthecentrally pivotedshoesareattachedtopivotedlevers,asinFigure1.Includingbrakes ofthisdesignwithinthecategoryoflinearlyactingbrakesisjustifiedifthey aredesignedsothattheappliedforcesontheshoesandliningsactalongthe radiioftheshaftsthattheygripwhenthebrakesareapplied.Brakesofthis typemayacteitheruponbrakedrumsordirectlyuponrotatingshaftsandare suitableforuseinheavy-dutyapplications,suchasfoundinminingand constructionequipmentandinmaterials-handlingmachinery. Internallinearlyactingdrumbrakes,suchasusedontrucksinEurope, maybedesignedasinFigure2.Eitherpneumaticorhydrauliccylindersor cams ... Inc. Letusdefinetheefficiencyofabrakeastheratioofthetorqueprovided bythebraketothetorquethatcouldbehadbyapplyingtheforcedirectlyto thedrum,orshaft.Accordingtothisdefinition,theefficiencybecomes T F s r ¼ Ap max r 2 wðsinu 2 Àsinu 1 Þ ð1=2Þp max r 2 wðf 0 þsinf 0 Þ ¼2A sinu 2 Àsinu 1 f 0 þsinf 0 ð1-10Þ Uponsubstitutingforu 1 andu 2 inequation(1-8)andrecallingequations(1-6) and( 1-7)wefindthat T F s r ¼ 4Asinðf 0 =2Þ f 0 þsinf 0 ¼A R r ð1-11Þ wheretheright-handsidehasalreadybeenplottedinFigure5.Fromthat figurewefindthatalthoughmaximumefficiencymaybeachievedonlyifeach shoeandliningextendoverhalfofthedrum,orshaft,relativelylittleefficiency islostiftheliningextendsoveronly160jinsteadof180j.This,togetherwith thenearimpossibilityofmaintaininggoodcontactbetweentheliningand thedrumneartheendsofashoesubtending180jatthecenterofthedrum, accountsfortheangulardimensionsofthebrakeliningsshowninFigure1. Finally,itfollowsfromequation(1-11)thatiftheshoeissymmetrically pivotedandifequation(1-7)holds,theappliedtorqueisgivenby T¼ARF s ð1-12Þ II.BRAKINGTORQUEANDMOMENTSFORSYMMETRICALLY SUPPORTEDINTERNALSHOES Pressurepandbrakingtorqueareagaingivenbyequations(1-2 )and( 1-4), respectively,foraninternalshoemovedagainstarotatingdrumalongaline paralleltoitsaxisofsymmetry,lineOB,inFigure6.Inthefollowinganalysis it ... Inc. Letusdefinetheefficiencyofabrakeastheratioofthetorqueprovided bythebraketothetorquethatcouldbehadbyapplyingtheforcedirectlyto thedrum,orshaft.Accordingtothisdefinition,theefficiencybecomes T F s r ¼ Ap max r 2 wðsinu 2 Àsinu 1 Þ ð1=2Þp max r 2 wðf 0 þsinf 0 Þ ¼2A sinu 2 Àsinu 1 f 0 þsinf 0 ð1-10Þ Uponsubstitutingforu 1 andu 2 inequation(1-8)andrecallingequations(1-6) and( 1-7)wefindthat T F s r ¼ 4Asinðf 0 =2Þ f 0 þsinf 0 ¼A R r ð1-11Þ wheretheright-handsidehasalreadybeenplottedinFigure5.Fromthat figurewefindthatalthoughmaximumefficiencymaybeachievedonlyifeach shoeandliningextendoverhalfofthedrum,orshaft,relativelylittleefficiency islostiftheliningextendsoveronly160jinsteadof180j.This,togetherwith thenearimpossibilityofmaintaininggoodcontactbetweentheliningand thedrumneartheendsofashoesubtending180jatthecenterofthedrum, accountsfortheangulardimensionsofthebrakeliningsshowninFigure1. Finally,itfollowsfromequation(1-11)thatiftheshoeissymmetrically pivotedandifequation(1-7)holds,theappliedtorqueisgivenby T¼ARF s ð1-12Þ II.BRAKINGTORQUEANDMOMENTSFORSYMMETRICALLY SUPPORTEDINTERNALSHOES Pressurepandbrakingtorqueareagaingivenbyequations(1-2 )and( 1-4), respectively,foraninternalshoemovedagainstarotatingdrumalongaline paralleltoitsaxisofsymmetry,lineOB,inFigure6.Inthefollowinganalysis it...

Ngày tải lên: 17/12/2013, 11:15

... Inc. OMandtheIM.Thebrakeconfigurationdiffersfromtheclutchonlyinthat theIMisrigidlyattachedtothebrakeframe. AnelectromagneticcoiloutsidetheOMandconcentricwithitisusedto activatethebrakeorclutch.Whenthecoilinenergizedbypassingcurrent throughitamagneticfieldisestablishedwhichcausestheparticlestobridge thegapbetweentheIMandtheOMandformlinksbetweenthetwo,as representedinFigure6(b).Theselinksarealongthemagneticlinesofforce, whicharemadenearlyperpendiculartotheOMbytheconfigurationofthe OMandthecoilhousing,asshowninFigures 6and7 . Boththeshearandtensilestressesintheselinksresistrelativemotion betweentheIMandtheOMandsotransmittorqueforthebrake/clutch. Theseshearandtensilestressesdevelopedaredependentonthecoilcurrent F IGURE 4Hysteresisbrakewitha8-lb-ftcapacity.(CourtesyofMagneticPower Systems, ... They are often designed in the laboratory by a combination of theory and trial and error because our present theory is not adequate to handle small geometric effects on the electric and magnetic ... (coulombs/meter 3 ) and constants q o and A o denote the electric and magnetic permeabilities of free space, respectively. In the MKS system, the units of q o are farads/meter and the units of A o are henries/meter. Chapter...

Ngày tải lên: 17/12/2013, 11:15

... N d1 l d1 l n1 tan 2 f and N n2 ¼ N d r d2 r n2 ¼ N d l d 2 l n2 tan 2 f ð3-1Þ where r d1 and r nl are the radii of the driver and driven cones, respectively, at point 1, r d 2 and r n2 are driver and driven ... Inc. setofunitstobeusedforeachratio,andtheresultingratiosareindependent oftheunitsused. Relativelybroadcurvesareshowninthefollowingcomputer-generated graphsforeasyreadingtoshowcharacteristicbehaviorandtoprovide contrastagainstthegridlines.Associatedroutines,suchasMathcadTrace, appeartoreadthemfromtheoriginatingdata,therebyeliminatingtheread- ingerrorsassociatedwithtracewidths. I.BELTDRIVES Equipmentusingnonmetallicbeltdrivesmayincludetheclutchcapabilityby mountingthemotor(becauseitisusuallysmallerthanthedrivenmachine) eitheruponahingedbaseoruponaslidingbasefittedwithaleveroralinkage thatpermitsthemotortobemovedtoandfromthedrivenmachineinorder toapplyandrelievethebelttensionandtherebygiveclutching(applyingbelt tension)anddeclutching(relievingbelttension)capability. Thesedesignseliminatetheneedforamechanicalclutch.Theirsim- plicityisachieved,however,attheriskofintroducingthepossibilitythat frictionalheatingofthebeltduringidling,whenthebelt(orbelts)mayreston themotor’srotatingsheave(pulley).Thatmaygenerateenoughheattocause beltingmaterialstoslowlyshrink.Thisreductioninthecenterdistance betweenthedrivinganddrivenpulleys,orsheaves,maybegreatenoughto causeanunintendedre-engagementofthemotorandthedrivenmachine.It mayalsoinhibittheirdisengagement.Consequently,somebeltmanufacturers producebeltsthatresistshrinkageduetoheatingforuseintheseclutching anddeclutchingapplications. Torquecapabilityforthesedrivesisaseparatecalculationtobe performedaccordingtotheproceduresgivenbythebeltmanufacturers. Therefore,itwillnotbeconsideredinthefollowingdiscussion. A.HingedBase Atfirstglanceitmayappearthatmovingamotorbymountingiteitherona hingedbaseoronaslidingbaseissosimplethatnoanalysisisnecessary.An analysis,however,doesbringforthseveralconsiderationsthatmaybemissed inselectingthedimensionsofthebaseplate,inlocatingthepositionofthe baseplatehinge,orindesigningthelinkagefortheslidingbaseplate. Twosimilar,butdistinct,mountingdesignsforhingedbaseswillbe considered.Intheseconfigurationsitistheweightofthemotoralonethat providesthebelttension.ThetensionvectorshowninFigure1(a )and( b) acting ... Inc. maximuminFigure16,setg=13.52j,asreadusingtheMathcadTrace feature.Evaluationofequation(1-13)forn=0.2,g=180,U=0.3,a=14j, andh=20foru=13.52jandforu=20jgivesadetentforceof4.544lb, whichiswithintheacceptablerange.Substitutionofg=180andq=1/32in. intoa=gq=180/32=5.625in.enablesdeterminationofrfromr=Ua= 0.(5.625)=1.688in.Withlengthlgivenbyl=r/n=1.688/0.2=8.44in.,it followsthattheclearancegivenbylÀr=8.440À1.688=6.752in.exceeds thatspecified. Thisclearancerequirementmaybesatisfiedbyincreasingthemagni- tudeofnandreducingthemagnitudeofg.Thus,ifn=0.28andg=150,the detentforcebecomes4.702lb,aisreducedto4.688in.,andrbecomes1.406in. Thesevaluesgivel=5.021in.,sotheclearanceis5.021À1.406=3.615in., whichiswithinthedesiredrange. VI.EXAMPLE3:CONEDRIVE Selectaconedriveforacombinationgolfcardandaproposedcongestedarea commutercartforuseincommunitiesthatacceptthem.Analysisoftorque transmissiononthebasisofthedynamiccoefficientsoffrictionforacceptable liningsindicatesthata2.00-in.overlapwouldbesufficient. Forcomparison,consideronedesignwiththedriverconehavingan apexhalf-angleof40janddrivenconeshavingapexhalf-anglesof50janda seconddesigninwhichboththedriveranddrivenconeshaveapexhalf-angles of45j.Inbothcasesinitiallyselectaconegeneratorlengthof6.00in.toallow theoverlaptobegreaterthan2.00in.intheeventthattheprototypeshould requiremodification. Beginwiththe40j,50jcombinationandturntoFigure11toselectthe dimensionsoftheconesbyenteringthecurveatz=6andreadinguptothe 40jline.Theprincipalradiusofcurvatureatthatpointis5.0346.Sincezis measuredininches,theprincipalradiusofcurvatureis5.0346in.Readingto theleftatthisvalueofUyieldsthatatz=4.25in.,theprincipalradiusof curvatureofthe50jhalf-angleconeis5.0650in.Aplotofthex-dimensionfor eachcone,showninFigure17(a),confirmsthatthetwoconesshouldroll without...

Ngày tải lên: 17/12/2013, 11:15

... reduce the time required for SQL command parsing. D You should develop your own naming conventions and standards. Overview of Data Modeling and Database Design 8Ć35 Designing the Database continued Map ... in the strategy and analysis phase into a graphical representation of business information needs and rules. Confirm and refine the model with the analysts and experts. Design D Design the database. ... birth weight species OneĆtoĆOne Mandatory Relationships Place the unique foreign key in the table at the mandatory end and label it NN to enforce the mandatory requirement and U to enforce the one-to-one...

Ngày tải lên: 21/12/2013, 06:17

... To provision and manage these overlay schemes is not supportable in a network that requires thousands or tens of thousands of VPNs, and hundreds, thousands, and tens of thousands of sites ... CE 2 and CE 3 , and there is some VPN V containing CE 1 , CE 2 , and CE 3 , then PE1 uses BGP to distribute to PE 2 and PE 3 the routes, which it has learned from CE 1 . PE 2 and PE 3 ... support very granular traffic handling. Cisco is actively participating in the development of the DiffServ standard, and plans to support it in the future. 1.3.12.2 Design Approach For Implementing...

Ngày tải lên: 21/12/2013, 19:15

... streamlining the design process and management, and increasing awareness and promotion of the sites you design and develop. Your primary job might not even be that of a Web designer—perhaps you ... uses of dynamic content and rich me- dia, keeping content fresh, improving site ranking and promotions, and managing redesigns. Using This Book Focusing on theory, standards, and rigid practices ... for Macintosh and Windows Popular with many Web design professionals, has very good standards support and integrates well with application technologies such as ColdFusion, JSP, and so forth....

Ngày tải lên: 22/12/2013, 19:17