Version 4
SHEET 1 1060 680
WIRE 176 -208 -240 -208
WIRE 464 -208 176 -208
WIRE 576 -208 464 -208
WIRE 880 -208 576 -208
WIRE 464 -160 464 -208
WIRE 176 -112 176 -128
WIRE 400 -112 176 -112
WIRE -240 -80 -240 -208
WIRE 576 -80 576 -208
WIRE 464 -32 464 -64
WIRE 512 -32 464 -32
WIRE 176 -16 176 -112
WIRE 464 32 464 -32
WIRE 576 32 576 16
WIRE -240 64 -240 0
WIRE 880 64 880 -208
WIRE -400 112 -496 112
WIRE -384 112 -400 112
WIRE 0 112 -96 112
WIRE 96 112 80 112
WIRE 144 112 96 112
WIRE 208 112 144 112
WIRE 464 112 288 112
WIRE 576 112 464 112
WIRE 704 112 576 112
WIRE -496 128 -496 112
WIRE 1040 144 880 144
WIRE 576 208 576 192
WIRE 0 256 0 192
WIRE 464 256 464 192
WIRE 512 256 464 256
WIRE 1040 256 1040 144
WIRE 464 272 464 256
WIRE 176 320 176 64
WIRE 400 320 176 320
WIRE 112 368 80 368
WIRE 176 368 176 320
WIRE -320 416 -320 160
WIRE 80 416 80 368
WIRE 80 416 -320 416
WIRE 112 416 80 416
WIRE -320 480 -320 416
WIRE 176 480 176 464
WIRE -320 512 -320 480
WIRE -320 576 -320 560
WIRE -160 576 -160 160
WIRE -160 576 -320 576
WIRE 176 576 176 560
WIRE 176 576 -160 576
WIRE 464 576 464 368
WIRE 464 576 176 576
WIRE 576 576 576 304
WIRE 576 576 464 576
WIRE 880 576 880 224
WIRE 880 576 576 576
FLAG -496 208 0
FLAG 1040 256 0
FLAG 704 112 out
FLAG -400 192 0
FLAG 0 256 0
FLAG 96 32 0
FLAG 144 112 x
SYMBOL voltage -496 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE()
SYMBOL pnp -384 160 M180
WINDOW 3 -37 101 Left 0
SYMATTR Value 2N5401
SYMATTR InstName Q1
SYMBOL pnp -96 160 R180
WINDOW 3 -34 105 Left 0
SYMATTR Value 2N5401
SYMATTR InstName Q2
SYMBOL res -336 464 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL current -240 -80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value 2m
SYMBOL voltage 880 48 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 35
SYMBOL voltage 880 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 35
SYMBOL res -16 96 R0
WINDOW 0 -33 71 Left 0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 96 96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 19k
SYMBOL current 176 -208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I2
SYMATTR Value 10m
SYMBOL voltage 176 -32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 2.56
SYMBOL npn 112 368 R0
SYMATTR InstName Q3
SYMBOL cap 176 352 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C1
SYMATTR Value 30p
SYMBOL res 160 464 R0
SYMATTR InstName R4
SYMATTR Value 22
SYMBOL npn 400 -160 R0
SYMATTR InstName Q4
SYMATTR Value BD139
SYMBOL npn 512 -80 R0
SYMATTR InstName Q5
SYMATTR Value Qmje15030
SYMBOL res 448 16 R0
SYMATTR InstName R5
SYMATTR Value 33
SYMBOL res 560 16 R0
SYMATTR InstName R6
SYMATTR Value 0.33
SYMBOL res 448 96 R0
SYMATTR InstName R7
SYMATTR Value 33
SYMBOL res 560 96 R0
SYMATTR InstName R8
SYMATTR Value 0.33
SYMBOL pnp 400 368 M180
SYMATTR InstName Q6
SYMATTR Value BD136
SYMBOL pnp 512 304 M180
SYMATTR InstName Q7
SYMATTR Value Qmje15031
SYMBOL res -416 96 R0
SYMATTR InstName R9
SYMATTR Value 20k
SYMBOL voltage 192 112 R270
WINDOW 0 32 56 VTop 0
WINDOW 3 -32 56 VBottom 0
WINDOW 123 -60 56 VBottom 0
SYMATTR InstName VI
SYMATTR Value ""
SYMATTR Value2 AC AC {u(-prb)}
SYMBOL current 96 32 R0
WINDOW 123 24 116 Left 0
SYMATTR Value2 AC {u(prb)}
SYMATTR InstName LI
SYMATTR Value ""
SYMBOL res -224 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R10
SYMATTR Value 234
SYMBOL res -144 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R11
SYMATTR Value 234
TEXT -472 -192 Left 0 !.ac dec 30 .1 100Meg
TEXT 672 312 Left 0 !.fourier 1K V(out)
TEXT -928 -160 Left 0 ;Plot\n \n-1/(1-1/(2*(I(Vi)@1*V(x)@2-V(x)@1*I(Vi)@2)+V(x)@1+I(Vi)@2))
TEXT -920 -40 Left 0 !.step param prb list -1 1 ; .set param prb = 0  ;