comp sci notes 2.docx

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Department
Electrical Engineering and Computer Science
Course
EECS 1520
Professor
John Hofbauer
Semester
Winter

Description
Chaps4510123Chap 4 gatescircuits41compsandelectricityAnyelectronicsignalhasvoltageleveldistinguishbetween0and1inbinarybyvoltagelevelofsignal02voltslowbinary025voltshighbinary1gatedevicethatperformsabasicoperationonelectricalsignalsacceptsoneinputsignalsandproducessingleoutputsignaldiffgatesperformspecificlogicalfunctioncircuitsgatesarecombinedintothesetoperformcomplicatedtasksieperformarithmeticandstorevaluesTheoutputvalueofonegateisoftentheinputvaluefor1gatesTheflowofelectricityiscontrolledcarefullymethodsusedtodescribebehavioursofgatescircuitsBooleanexpressionslogicdiagramstruthtablesBooleanexpressionsGeorgebooleinventedalgebraformwherevariablesandfunctionsonlytakeonvaluesof1or0LogicdiagramgraphicalrepresentationeachtypeofgaterepresentedbyaspecificgraphicalsymbolTruthtabledefinesfunctionofgatebylistingallpossibleinputcombosthatthegatecouldencounteralongwiththeoutput42gatesAkalogicgatesbconlyperformsonelogicalfunctionaccepts1ormoreimputvaluesandproducesasingleoutputvalueeachinputandoutputvalueiseither1or0NOTGATEaccepts1inputvalueandproduces1outputvaluecalledinverterbcifinputis0outputis1andifinputis1thenoutputis0AinputandXoutputANDGATEaccepts2inputsignalsandproduces1Ifbothinputsare1thenoutput1allothercasesoutputis0ORGATEakainclusiveORgate2inputsand1outputIfbothinputsare0thenoutputis0allothercasesoutputis1XORGATEakaexclusiveORgateproduces0ifbothinputsarethesameallothercasesproducesa1soXORandORonlydifferin1situationNANDGATEaccepts2inputvaluesoppositeofANDgateANDsinputsareNANDSoutputsandviceversaNORGATESaccepts2inputvaluesoppositeofORgateORsinputsareNORsoutputsandviceversa
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