"N" type: Version 4 SHEET 1 880 680 WIRE 96 64 48 64 WIRE 208 64 96 64 WIRE 304 64 208 64 WIRE 96 96 96 64 WIRE 208 112 208 64 WIRE 304 128 304 64 WIRE -32 144 -32 64 WIRE -32 144 -96 144 WIRE 32 144 -32 144 WIRE 96 208 96 192 WIRE 96 208 -96 208 WIRE 208 208 208 192 WIRE 208 208 96 208 WIRE 304 208 304 192 WIRE 304 208 208 208 FLAG -96 144 In IOPIN -96 144 In FLAG -96 208 In IOPIN -96 208 In SYMBOL diode 288 128 R0 SYMATTR InstName D1 SYMATTR Value 1N4007 SYMBOL voltage 208 96 R0 WINDOW 3 -47 135 Left 2 SYMATTR Value Rm=16.3K SYMATTR InstName Vm SYMBOL npn 32 96 R0 SYMATTR InstName Q1 SYMATTR Value TIP50 SYMBOL res -48 80 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 3.58K TEXT -112 176 Left 2 ;Vin TEXT -88 272 Left 2 ;2-terminal negative resistance\n used for meter protection.\n (plot Vm VS Vin) .ENDS
Puzzling plot: SCR anybody? Version 4 SHEET 1 880 680 WIRE 96 64 48 64 WIRE 256 64 96 64 WIRE -32 96 -32 64 WIRE 16 96 -32 96 WIRE 96 96 96 64 WIRE 256 96 256 64 WIRE -80 144 -96 144 WIRE 16 144 16 96 WIRE 16 144 0 144 WIRE 32 144 16 144 WIRE -96 224 -96 144 WIRE 96 272 96 192 WIRE 96 272 -32 272 WIRE -96 352 -96 320 FLAG -96 352 0 FLAG 256 176 0 SYMBOL npn 32 96 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res -48 80 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 58 -18 VBottom 2 SYMATTR InstName R1 SYMATTR Value 10K SYMBOL pnp -32 320 R180 SYMATTR InstName Q2 SYMATTR Value 2N3906 SYMBOL res -96 160 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R2 SYMATTR Value 0.1 SYMBOL voltage 256 80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 24 124 Left 2 SYMATTR InstName V1 SYMATTR Value 0 SYMATTR SpiceLine Rser=1E-6 TEXT 60 296 Left 2 !.dc V1 0V 100V 1mV TEXT 88 -16 Left 4 !.PLOT V(V1), I(V1) .ENDS
How can one emulate a "Z" type negative resistance?
Thanks.