INTRODUCTIONThemostimportantfactorinthedesignofmanysystemstodayisspeed.66-MHzthru200-MHzprocessorsarecommon;233and266-MHzprocessorsarebecomingreadilyavailable.Thedemandforhighspeedresultsfrom:a)therequirementthatsystemsperformcomplextasksinatimeframeconsideredcomfortablebyhumans;and