Version 4
SHEET 1 1032 680
WIRE 208 96 16 96
WIRE 528 96 208 96
WIRE 880 96 528 96
WIRE 528 144 528 96
WIRE 208 192 208 176
WIRE 288 192 208 192
WIRE 464 192 368 192
WIRE 208 288 208 192
WIRE 880 288 880 96
WIRE 528 320 528 240
WIRE 736 320 528 320
WIRE -48 336 -128 336
WIRE 16 336 16 176
WIRE 144 336 16 336
WIRE 528 400 528 320
WIRE -128 416 -128 336
WIRE 208 448 208 384
WIRE 288 448 208 448
WIRE 464 448 368 448
WIRE 16 496 16 336
WIRE 208 496 208 448
WIRE 528 496 528 480
WIRE 736 496 736 384
WIRE -128 576 -128 496
WIRE 16 576 -128 576
WIRE 208 576 16 576
WIRE 400 576 208 576
WIRE 528 576 528 496
WIRE 528 576 400 576
WIRE 736 576 528 576
WIRE 880 576 880 368
WIRE 880 576 736 576
WIRE 400 640 400 576
FLAG 400 640 0
SYMBOL res 192 80 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 192 480 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL res 0 80 R0
SYMATTR InstName R5
SYMATTR Value 9k
SYMBOL res 0 480 R0
SYMATTR InstName R6
SYMATTR Value 1900
SYMBOL voltage 880 272 R0
SYMATTR InstName V1
SYMATTR Value 24
SYMBOL cap 720 320 R0
SYMATTR InstName C1
SYMATTR Value 470µ
SYMBOL cap 16 320 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 470µ
SYMBOL res 720 480 R0
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL res 384 432 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 1
SYMBOL res 384 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1
SYMBOL voltage -128 400 R0
SYMATTR InstName V2
SYMATTR Value SINE(0 1m 50)
SYMBOL npn 144 288 R0
SYMATTR InstName Q1
SYMBOL npn 464 144 R0
SYMATTR InstName Q3
SYMBOL npn 464 400 R0
SYMATTR InstName Q4
TEXT 856 656 Left 2 !.tran 200m