Version 4
SHEET 1 880 680
WIRE 224 96 224 16
WIRE -288 144 -352 144
WIRE -128 144 -208 144
WIRE 64 144 -128 144
WIRE 160 144 64 144
WIRE -736 176 -736 160
WIRE -672 176 -672 160
WIRE -672 176 -736 176
WIRE -608 176 -608 160
WIRE -608 176 -672 176
WIRE -736 192 -736 176
WIRE -128 192 -128 144
WIRE 224 208 224 192
WIRE 336 208 224 208
WIRE 432 208 336 208
WIRE 560 208 512 208
WIRE 640 208 560 208
WIRE 224 224 224 208
WIRE 560 240 560 208
WIRE -128 320 -128 272
WIRE 224 336 224 304
WIRE 560 352 560 320
FLAG -736 192 0
FLAG -736 80 +10V
FLAG 224 16 +10V
FLAG -672 80 -10V
FLAG -608 80 Vin
FLAG -352 144 Vin
FLAG 224 336 -10V
FLAG 640 208 Vout
FLAG 560 352 0
FLAG -128 320 0
FLAG 64 144 Vb
FLAG 336 208 Ve
SYMBOL npn 160 96 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 53 45 Invisible 0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL res 208 208 R0
WINDOW 0 36 40 Invisible 0
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL voltage -736 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -28 61 Left 0
SYMATTR InstName V1
SYMATTR Value +10V
SYMBOL voltage -672 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -27 60 Left 0
SYMATTR InstName V2
SYMATTR Value -10V
SYMBOL voltage -608 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 3 147 VRight 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value SINE(0 6V 1kHz)
SYMBOL res 528 192 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res 576 336 R180
WINDOW 0 36 76 Invisible 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL res -192 128 R90
WINDOW 0 0 56 Invisible 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL res -112 288 R180
WINDOW 0 36 76 Invisible 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R5
SYMATTR Value 1K
TEXT -712 424 Left 0 !.tran 1.3ms
TEXT -328 128 Left 0 ;A
TEXT 144 128 Left 0 ;B
TEXT 248 192 Left 0 ;E
TEXT 552 184 Left 0 ;F