Design of ternary current-mode CMOS circuits based on switch-signal theory

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1、Vol.10No.3JOURNALOFELECTRONICSJuly1993DESIGNOFTERNARYCURRENT-MODECMOSCIRCUITSBASEDONSWITCH-SIGNALTHEORY*WuXunwei(~~111/~)DengXiaowei(~d'-I-J.)(HangzhouUniversity,Hangzhou310028)YingShiyan{)~11~~)(ZhejiangPolytechnicCollege,Hangshou310014)AbstractByapplyingswitch-si

2、gnaltheory,theinteractionbetweenMOStransmissionswitch-ingtransistorandcurrentsignalincurrent-modeCMOScircuitsisanalyzed,andthetheoryoftransmissioncurrent-switcheswhichissuitabletocurrent-modeCMOScircuitsisproposed.Thecircuits,suchasternaryfull-adderetc.,designedbyu

3、singthistheoryhavesimplercircuitstruc-turesandcorrectlogicfunctions.Itisconfirmedthatthisoheoryisefficientinguidingthelogicdesignofcurrent-modeCMOScircuitsatswitchlevel.KeywordsSwitch-signaltheory;Theoryoftransmissioncurrent-switches;Multivaluedlogic;Current-modeCM

4、OScircuitI.IntroductionIlltheresearchofmultivaluedCMOScircuits,tileauthorshaveproposedtheviewpointthattheswitchingstateofanelementandsignalshouldbeseparatelydescribedbytwodifferentkindsofvariables(switchingvariableandsignalvariable}.Thus,twoalgebrasystems,switching

5、algebraandsignalalgebra{Postalgebra),aredistinguished,asshownillFig.1.Inthisfigure,therearetwokindsofconnectionoperationstoconnectthesetwoalgebrasystems.Theydescribethephysicalinteractionbetweenswitchingelementandsignalinacircuit.ConnectionoperationI--describesthep

6、hysicalprocessthatsignalcontrolstheswitch-ingstateofanelement.ConnectionoperationII--describesthephysicalprocessthattheswitchingstateofanelementcontrolsthetransmissionandformationofasignal.TheaboveviewpointhasbeenappliedtodesignthemultivaluedCMOScircuitsandtoestabl

7、ishthecorrespondingtheoryoftransmissionvoltage-switches(previouslynamed"translnissionfunctiontheory"[l-41)."SinceitcorrectlydescribestheactionofMOSswitch-ingelementinacircuit,thistheorycanbeefficientlyusedtoguidethelogicdesignofmultivahedCMOScircuitsatswitchlevel.H

8、owever,allthedesignedmultivaluedCMOScircuitsusevoltagesignal,andtheyrequireanextrapowersupplyequipmentandaddi-*SupportedbyNationalNaturalScienceF