Version 4
SHEET 1 1236 680
WIRE 240 -400 -96 -400
WIRE 448 -400 240 -400
WIRE 768 -400 448 -400
WIRE 448 -352 448 -400
WIRE 768 -224 768 -400
WIRE 448 -176 448 -272
WIRE 704 -176 448 -176
WIRE 768 -96 768 -128
WIRE 448 -80 448 -176
WIRE 768 -80 768 -96
WIRE 768 32 768 0
WIRE 768 32 256 32
WIRE 896 32 768 32
WIRE 992 32 896 32
WIRE 1168 32 1056 32
WIRE 768 64 768 32
WIRE 448 80 448 -16
WIRE -96 96 -96 -400
WIRE 256 96 256 32
WIRE 768 192 768 144
WIRE -96 224 -96 176
WIRE 448 240 448 144
WIRE 704 240 448 240
WIRE 448 272 448 240
WIRE 16 320 -96 320
WIRE 96 320 16 320
WIRE 256 320 256 176
WIRE 256 320 160 320
WIRE 384 320 256 320
WIRE -96 368 -96 320
WIRE 256 432 256 320
WIRE 448 432 448 368
WIRE 1168 432 1168 32
WIRE -96 544 -96 448
WIRE 256 544 256 512
WIRE 448 544 448 512
WIRE 768 544 768 288
WIRE 1168 544 1168 512
FLAG 256 544 0
FLAG 448 544 0
FLAG -96 544 0
FLAG 1168 544 0
FLAG -96 224 0
FLAG 1168 32 out_b
FLAG 16 320 in
FLAG 768 544 0
FLAG 240 -400 UB_12V
FLAG 896 32 out_a
FLAG 768 -96 R7
SYMBOL cap 96 336 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL res 240 416 R0
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL res 240 80 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL res 432 -368 R0
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL npn 384 272 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL voltage -96 352 R0
WINDOW 3 24 44 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 200m 1k)
SYMBOL cap 992 48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 470µ
SYMBOL res 1152 416 R0
SYMATTR InstName R5
SYMATTR Value 4
SYMBOL voltage -96 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 6
SYMBOL pnp 704 288 M180
SYMATTR InstName Q2
SYMATTR Value BC557B
SYMBOL npn 704 -224 R0
SYMATTR InstName Q3
SYMATTR Value BC547B
SYMBOL res 752 48 R0
SYMATTR InstName R6
SYMATTR Value 10
SYMBOL res 752 -96 R0
SYMATTR InstName R7
SYMATTR Value 10
SYMBOL diode 432 -80 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL diode 432 80 R0
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL res 432 416 R0
SYMATTR InstName R3
SYMATTR Value 47
TEXT -132 588 Left 2 !.tran 1