Version 4
SHEET 1 880 680
WIRE 416 -16 192 -16
WIRE 192 0 192 -16
WIRE 192 0 144 0
WIRE 240 0 192 0
WIRE 144 16 144 0
WIRE 240 16 240 0
WIRE 416 16 416 -16
WIRE 144 112 144 96
WIRE 240 112 240 96
WIRE 272 112 240 112
WIRE 144 128 144 112
WIRE 240 128 240 112
WIRE 416 160 416 96
WIRE 448 160 416 160
WIRE 80 176 32 176
WIRE 336 176 304 176
WIRE 448 176 448 160
WIRE 32 192 32 176
WIRE 336 192 336 176
WIRE 144 240 144 224
WIRE 192 240 144 240
WIRE 240 240 240 224
WIRE 240 240 192 240
WIRE 416 240 416 160
WIRE 192 256 192 240
WIRE -32 272 -32 256
WIRE 192 352 192 336
WIRE 416 352 416 320
WIRE 416 352 192 352
FLAG 32 272 0
FLAG 336 272 0
FLAG -32 272 0
FLAG 448 176 0
SYMBOL npn 80 128 R0
SYMATTR InstName Q1
SYMBOL npn 304 128 M0
SYMATTR InstName Q2
SYMBOL res 128 0 R0
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL res 224 0 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL voltage 416 0 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL res 176 240 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 320 176 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 16 176 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap 336 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 2.2µ
SYMBOL voltage 416 224 M0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 6
SYMBOL cap 144 96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 2.2µ
SYMBOL cap 32 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 2.2µ
SYMBOL voltage -32 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(0 10m 1000)
TEXT -64 360 Left 2 !.tran 0 0.01 0 0.00001