Version 4
SHEET 1 1840 916
WIRE -704 -128 -704 -160
WIRE -416 -128 -416 -160
WIRE -704 -16 -704 -48
WIRE -480 -16 -704 -16
WIRE -704 0 -704 -16
WIRE -1280 16 -1280 -128
WIRE -416 16 -416 -48
WIRE -1088 64 -1088 -128
WIRE -752 64 -1088 64
WIRE -480 64 -480 -16
WIRE -1088 96 -1088 64
WIRE -704 176 -704 96
WIRE -416 176 -416 112
WIRE -416 176 -704 176
WIRE -272 176 -416 176
WIRE -192 176 -272 176
WIRE -704 272 -704 176
WIRE -272 272 -272 176
WIRE -704 464 -704 352
WIRE -272 464 -272 352
WIRE -1280 480 -1280 96
WIRE -1088 480 -1088 176
FLAG -1088 480 0
FLAG -1088 -128 Signal
FLAG -704 464 0
FLAG -704 -160 +V
FLAG -416 -160 +V
FLAG -1280 480 0
FLAG -1280 -128 +V
FLAG -192 176 Out
FLAG -272 464 0
SYMBOL voltage -1088 80 R0
WINDOW 123 24 124 Left 2
WINDOW 39 24 152 Left 2
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser=4.4k Cpar=13p
SYMATTR InstName V1
SYMATTR Value SINE(0.2 10m 100k)
SYMBOL res -720 -144 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res -432 -144 R0
SYMATTR InstName R2
SYMATTR Value {Re}
SYMBOL pnp -480 112 M180
SYMATTR InstName Q1
SYMATTR Value BC858B
SYMBOL voltage -1280 0 R0
WINDOW 123 24 154 Left 2
WINDOW 39 24 124 Left 2
SYMATTR Value2 AC 1
SYMATTR SpiceLine Rser=0.1
SYMATTR InstName V2
SYMATTR Value 12
SYMBOL res -288 256 R0
SYMATTR InstName Rload
SYMATTR Value 50k
SYMBOL njf -752 0 R0
SYMATTR InstName J1
SYMATTR Value 2N4416
SYMBOL res -720 256 R0
SYMATTR InstName R3
SYMATTR Value 1k
TEXT -272 -136 Left 2 !.ac oct 100 1k 100Meg
TEXT -272 -176 Left 2 ;.tran 0 1200us 200us
TEXT -176 408 Left 2 !.option numdgt=14
TEXT -176 440 Left 2 !.option plotwinsize=0
TEXT -712 -240 Left 3 ;JFET Buffer
TEXT -160 248 Left 2 !.step param Re list 1 10 100
TEXT -272 -96 Left 2 ;.noise V(Out) V1 dec 100 1k 100Meg