Version 4
SHEET 1 880 680
WIRE 224 -112 224 -128
WIRE 224 -112 64 -112
WIRE 64 -96 64 -112
WIRE 224 -48 224 -112
WIRE 64 0 64 -16
WIRE 160 0 64 0
WIRE 64 48 64 0
WIRE 224 64 224 48
WIRE 64 128 64 112
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 224 176 224 144
WIRE 352 176 224 176
WIRE -736 192 -736 176
WIRE 224 208 224 176
WIRE 64 224 64 192
WIRE 64 224 -64 224
WIRE 96 224 64 224
WIRE 64 240 64 224
WIRE 352 288 352 176
WIRE 224 304 224 288
WIRE 64 352 64 304
WIRE 160 352 64 352
WIRE 64 384 64 352
WIRE 352 416 352 368
WIRE 64 480 64 464
WIRE 224 480 224 400
WIRE 224 480 64 480
FLAG -736 192 0
FLAG -736 80 +15V
FLAG -672 80 -15V
FLAG -608 80 Vin
FLAG -64 224 Vin
FLAG 224 -128 +15V
FLAG 224 480 -15V
FLAG 352 176 out
FLAG 352 416 0
SYMBOL npn 160 -48 R0
WINDOW 0 56 32 Invisible 0
WINDOW 3 56 68 Invisible 0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL voltage -736 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -28 61 Left 0
SYMATTR InstName V1
SYMATTR Value +15V
SYMBOL voltage -672 64 R0
WINDOW 0 24 16 Invisible 0
WINDOW 3 -27 60 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value -15V
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 10V 1kHz)
SYMBOL pnp 160 400 M180
WINDOW 0 84 32 Invisible 0
WINDOW 3 84 68 Invisible 0
SYMATTR InstName Q2
SYMATTR Value 2N3906
SYMBOL res 336 272 R0
SYMATTR InstName Rload
SYMATTR Value 8
SYMBOL res 48 -112 R0
WINDOW 0 36 40 Invisible 0
SYMATTR InstName R1
SYMATTR Value 250
SYMBOL res 48 368 R0
WINDOW 0 36 40 Invisible 0
SYMATTR InstName R2
SYMATTR Value 250
SYMBOL diode 48 48 R0
WINDOW 0 24 0 Invisible 0
WINDOW 3 24 72 Invisible 0
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL diode 48 128 R0
WINDOW 0 24 0 Invisible 0
WINDOW 3 24 72 Invisible 0
SYMATTR InstName D2
SYMATTR Value 1N914
SYMBOL diode 48 240 R0
WINDOW 0 24 0 Invisible 0
WINDOW 3 24 72 Invisible 0
SYMATTR InstName D3
SYMATTR Value 1N914
SYMBOL res 208 48 R0
SYMATTR InstName R3
SYMATTR Value 1
SYMBOL res 208 192 R0
SYMATTR InstName R4
SYMATTR Value 1
TEXT -712 424 Left 0 !.tran 1.3ms