Version 4
SHEET 1 1344 884
WIRE -144 -96 -288 -96
WIRE -96 -96 -144 -96
WIRE 512 -96 -96 -96
WIRE 624 -96 512 -96
WIRE 720 -96 624 -96
WIRE -96 -80 -96 -96
WIRE 512 -80 512 -96
WIRE 624 -80 624 -96
WIRE -288 -64 -288 -96
WIRE -144 -64 -144 -96
WIRE 720 -64 720 -96
WIRE -144 16 -144 0
WIRE -96 16 -96 0
WIRE -96 16 -144 16
WIRE -288 32 -288 16
WIRE 512 32 512 0
WIRE 512 128 512 112
WIRE 80 176 16 176
WIRE 224 176 160 176
WIRE 624 176 624 0
WIRE 624 176 576 176
WIRE 720 176 720 0
WIRE 720 176 624 176
WIRE 16 304 16 176
WIRE 80 304 16 304
WIRE 224 304 224 176
WIRE 224 304 160 304
WIRE 624 336 624 176
WIRE -96 368 -96 16
WIRE -80 368 -96 368
WIRE 16 368 16 304
WIRE 16 368 0 368
WIRE 224 368 224 304
WIRE 256 368 224 368
WIRE 512 368 512 224
WIRE 512 368 256 368
WIRE 368 400 352 400
WIRE 16 432 16 368
WIRE 80 432 16 432
WIRE 224 432 224 368
WIRE 224 432 144 432
WIRE 368 432 368 400
WIRE 512 480 512 368
WIRE 512 480 432 480
WIRE 512 512 512 480
WIRE 624 560 624 416
WIRE 624 560 576 560
WIRE 720 560 624 560
WIRE 368 624 368 528
WIRE 512 624 512 608
WIRE -96 720 -96 368
WIRE -96 720 -144 720
WIRE 368 720 368 704
WIRE 512 720 512 704
WIRE 512 720 368 720
WIRE -144 736 -144 720
WIRE -96 736 -96 720
WIRE 512 736 512 720
WIRE 624 736 624 560
WIRE 720 736 720 560
WIRE -144 832 -144 800
WIRE -96 832 -96 816
WIRE -96 832 -144 832
WIRE 512 832 512 816
WIRE 512 832 -96 832
WIRE 624 832 624 816
WIRE 624 832 512 832
WIRE 720 832 720 800
WIRE 720 832 624 832
WIRE -96 864 -96 832
FLAG -96 864 0
FLAG -288 32 0
FLAG 256 368 S
FLAG -288 -96 U
FLAG 352 400 U
SYMBOL npn2 576 512 M0
WINDOW 0 35 47 Left 2
WINDOW 3 -37 -13 Left 2
SYMATTR InstName Q1
SYMATTR Value BC847C
SYMBOL pnp2 576 224 R180
WINDOW 0 34 46 Left 2
WINDOW 3 -35 -14 Left 2
SYMATTR InstName Q2
SYMATTR Value BC857C
SYMBOL res 496 -96 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 496 608 R0
SYMATTR InstName R2
SYMATTR Value 910
SYMBOL res -112 720 R0
SYMATTR InstName R3
SYMATTR Value 2k2
SYMBOL res -112 -96 R0
SYMATTR InstName R4
SYMATTR Value 2k2
SYMBOL res 608 320 R0
SYMATTR InstName R5
SYMATTR Value 180k
SYMBOL res 608 -96 R0
SYMATTR InstName R6
SYMATTR Value 27k
SYMBOL res 608 720 R0
SYMATTR InstName R7
SYMATTR Value 27k
SYMBOL ind 64 320 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMATTR SpiceLine Rser=0.5
SYMBOL cap 144 416 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 470p
SYMATTR SpiceLine Rser=5m
SYMBOL cap 704 -64 R0
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL cap 704 736 R0
SYMATTR InstName C3
SYMATTR Value 22n
SYMBOL cap -128 800 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL voltage -288 -80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 -15 142 Left 2
SYMATTR SpiceLine Rser=0.01
SYMATTR InstName V1
SYMATTR Value 24
SYMBOL cap -128 0 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C5
SYMATTR Value 100n
SYMBOL res 16 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 2k5
SYMBOL res 496 720 R0
SYMATTR InstName R9
SYMATTR Value 375
SYMBOL npn2 432 432 M0
SYMATTR InstName Q3
SYMATTR Value BC847C
SYMBOL res 384 720 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R10
SYMATTR Value 8k2
SYMBOL res 496 16 R0
SYMATTR InstName R11
SYMATTR Value 1k
SYMBOL res 176 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 20Meg
TEXT 832 -32 Left 2 !.tran 0 15.002m 15m startup
TEXT -296 120 Left 2 ;...
TEXT 832 -80 Left 2 ;Copyright (c) Helmut Schellong, 1989, 2020
TEXT 160 328 Left 1 ;0.5R
TEXT 160 456 Left 1 ;0.005R