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1、PROCEEDINGSLETTERS947Foranumericalappreciationoftheresultstheswitchingtimeforeach7:=T[iln{C(3Ar2)1(1+A-+A)2A2}segmentiscomputedintermsofitstimeconstant.ThetunnelandbackwarddiodeparametersusedareI,=5mA,lo=0.5mA,V,=100mV,V,=580mV,(6)2+AV,=1080mV,C,=50pF,V,=340m
2、V,I,=6.7mA,R,=300ohms,andC,=5pF.TheoperatingpointsAandBareV,=70mV,I,=4.5mA,V,=850mV,andI,=1.2mA.LetusassumethatAi’=1mAandAi-=0.5wheremA;thenthecalculatedresultsareT:=1.32C(r,),T;=1.2C(r2),T;=0.52C(r,),T;=2.1C(r3),r;=5.1C(r,),andT;=0.31C(r,).Theswitchingtimeca
3、lculationsindicatethatthecapacitanceoftheA-{l+(x)}”3and(r2)=nonlinearelementhasdirectinfluenceontheswitchingspeedofthecircuit1,-1,andthattheswitchingtimedependsontheaverageresistanceofvarioussegmentsofthetunneldiodecharacteristic.ThetotalforwardandreverseThes
4、witchingintervalT:fromV,toV,isobtainedbyreplacingubyswitchingtimewithanonlinearloadis10.5nsand38ns,respectively.(c-V,)in(2)andusing(4)and(IC)whichfinallyyieldsForcomparison,calculationswithalinearload[IO]passingthroughthesameoperatingpointsAandBaremade,anditi
5、sseenthatthetotalfor-wardandreverseswitchingtimeinthiscaseis20.3nsand13.5ns,respec-tively.Itmaythusbeconcludedthatwiththeuseofanonlinearloadinatunneldiodebistabletrigger,theorderofswitchingtimeremainsalmostthesame,whereasthestabilityoftheoperatingpointandthei
6、nputsensi-tivityareimprovedsignificantly.Theperformanceofanexperimentalcounter[1]usingindividualtriggerstageswithnonlinearloadsupportswheretheaboveconclusions.A.B.BHATTACHARWAS.L.SARNOT(r,)=(-19I,-I,WoDept.ofPhys.IndianInst.Tech.NewDelhi29,India&F!2RENCFS[I]A
7、.S.Sidorov,“Tunneldiodecountingcircuits,”inSemiconductorDecicesandTheirUses.CollecrionofPapers(inRussian),vol.14,Ya.A.Fedotov,Ed.Moscow:SovetskoyeRadio,1965,pp.131-142.[2]V.I.VaganovandV.I.Korzh,“Aqualitativeanalysisoftransientsintunneldiodetrigger,”SocierRad
8、ioEngrg.,vol.8,pp.176-182,March-April1965.[3]A.L.Whetstone,“Improvingthetunneldiodeunivibrator,”Rec.Sci.Insrr.,vol.34,pp.412413,April1963.Forreverseswitchingthetotalinputsignalshouldbe(Io
