Version 4
SHEET 1 880 680
WIRE -80 96 -80 64
WIRE -80 96 -192 96
WIRE 112 96 -80 96
WIRE 128 96 112 96
WIRE 304 96 224 96
WIRE 432 96 304 96
WIRE 608 96 608 64
WIRE 608 96 432 96
WIRE -80 160 -80 96
WIRE 112 176 112 96
WIRE 304 192 304 96
WIRE 48 224 16 224
WIRE -192 304 -192 96
WIRE -80 304 -80 224
WIRE 16 304 16 224
WIRE 80 304 16 304
WIRE 112 304 112 272
WIRE 112 304 80 304
WIRE 240 304 240 240
WIRE 240 304 112 304
WIRE 432 304 432 96
WIRE 208 320 208 144
WIRE 304 320 304 288
WIRE 304 320 208 320
WIRE 336 320 304 320
WIRE 112 336 112 304
WIRE 304 336 304 320
WIRE -192 448 -192 384
WIRE -80 448 -80 384
WIRE 112 448 112 416
WIRE 304 448 304 416
WIRE 432 448 432 384
FLAG -80 448 0
FLAG 112 448 0
FLAG 304 448 0
FLAG -80 64 U1
FLAG 608 64 U2
FLAG 432 448 0
FLAG -192 448 0
FLAG 80 304 Ub
FLAG 336 320 Ug
SYMBOL pnp 240 288 M180
SYMATTR InstName Q2
SYMATTR Value BC557B
SYMBOL voltage -80 288 R0
WINDOW 3 -136 209 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 38 55 Left 2
SYMATTR Value PULSE(0 5.5 0.1 0.1 0.1 1 5 1)
SYMATTR SpiceLine Rser=1
SYMATTR InstName V1
SYMBOL pmos 128 144 R270
WINDOW 0 103 31 VRight 2
WINDOW 3 71 -4 VRight 2
SYMATTR InstName M1
SYMATTR Value FDR840P
SYMBOL pnp 48 272 M180
SYMATTR InstName Q1
SYMATTR Value BC557C
SYMBOL Misc\\EuropeanResistor 96 320 R0
SYMATTR InstName R1
SYMATTR Value 4700
SYMBOL Misc\\EuropeanResistor 288 320 R0
SYMATTR InstName R2
SYMATTR Value 4700
SYMBOL res -208 288 R0
SYMATTR InstName R3
SYMATTR Value 1K
SYMBOL voltage 432 288 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 4.5
SYMBOL diode -64 224 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
TEXT 328 496 Left 2 !.tran 5