Version 4
SHEET 1 880 680
WIRE 304 -96 96 -96
WIRE 432 -96 304 -96
WIRE 736 -96 432 -96
WIRE 432 -16 416 -16
WIRE 432 0 432 -16
WIRE 304 48 304 -16
WIRE 304 48 288 48
WIRE 352 48 352 -16
WIRE 352 48 304 48
WIRE 368 48 352 48
WIRE 304 96 304 48
WIRE 736 112 736 -96
WIRE -64 144 -208 144
WIRE -32 144 -64 144
WIRE 96 144 96 -16
WIRE 96 144 32 144
WIRE 224 144 224 48
WIRE 224 144 96 144
WIRE 240 144 224 144
WIRE 432 160 432 96
WIRE 640 160 432 160
WIRE 432 192 432 160
WIRE 432 192 416 192
WIRE -64 208 -64 144
WIRE -208 224 -208 144
WIRE 432 224 432 192
WIRE 640 240 640 160
WIRE 304 272 304 192
WIRE 352 272 352 192
WIRE 352 272 304 272
WIRE 368 272 352 272
WIRE 304 304 304 272
WIRE -208 384 -208 304
WIRE -64 384 -64 288
WIRE -64 384 -208 384
WIRE 304 384 -64 384
WIRE 432 384 432 320
WIRE 432 384 304 384
WIRE 640 384 640 320
WIRE 640 384 432 384
WIRE 736 384 736 192
WIRE 736 384 640 384
FLAG -208 144 Vin
FLAG 736 -96 Vcc
SYMBOL schottky 32 128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 80 -112 R0
SYMATTR InstName R1
SYMATTR Value 20k
SYMBOL res 288 -112 R0
SYMATTR InstName R2
SYMATTR Value 8k
SYMBOL res 288 288 R0
SYMATTR InstName R3
SYMATTR Value 3k
SYMBOL res 416 -112 R0
SYMATTR InstName R4
SYMATTR Value 120R
SYMBOL npn 240 96 R0
WINDOW 0 24 51 Left 2
WINDOW 3 -5 115 Left 2
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL npn 368 0 R0
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL npn 368 224 R0
SYMATTR InstName Q3
SYMATTR Value BC547B
SYMBOL voltage 736 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 624 224 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res -80 192 R0
SYMATTR InstName R6
SYMATTR Value 1k8
SYMBOL voltage -208 208 R0
WINDOW 3 -391 52 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0.1 0.1 0.1 0.25 0.15 10)
SYMBOL schottky 224 64 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 352 208 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 352 0 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D4
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
TEXT -242 394 Left 2 !.tran 5 startup