Version 4
SHEET 1 1028 680
WIRE -176 -128 -240 -128
WIRE -112 -128 -176 -128
WIRE 16 -128 -32 -128
WIRE 80 -128 16 -128
WIRE 208 -128 80 -128
WIRE 272 -128 208 -128
WIRE 544 -128 336 -128
WIRE 80 -96 80 -128
WIRE -240 -80 -240 -128
WIRE 16 -48 -80 -48
WIRE 544 -48 544 -128
WIRE 208 -32 208 -128
WIRE 224 -32 208 -32
WIRE 352 -32 304 -32
WIRE -80 -16 -80 -48
WIRE 352 -16 352 -32
WIRE -240 80 -240 0
WIRE -240 80 -288 80
WIRE -80 80 -80 64
WIRE -80 80 -240 80
WIRE 80 80 80 0
WIRE 80 80 -80 80
WIRE 352 80 352 48
WIRE 352 80 80 80
WIRE 544 80 544 32
WIRE 544 80 352 80
WIRE -288 96 -288 80
FLAG -288 96 0
FLAG -176 -128 mp1
FLAG 16 -128 mp2
FLAG -80 -48 B
FLAG 352 -32 mp3
FLAG 544 -128 mp4
SYMBOL voltage -240 -96 R0
WINDOW 3 -179 -176 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 10 0 50n 50n 1350n 3µ)
SYMATTR InstName V1
SYMBOL Misc\\EuropeanResistor -16 -144 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL pnp 16 0 M180
SYMATTR InstName Q1
SYMATTR Value BC557B
SYMBOL voltage -80 -32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value SINE(2.35 3 440)
SYMBOL Misc\\EuropeanResistor 320 -48 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL cap 336 -16 R0
SYMATTR InstName C1
SYMATTR Value 2.2n
SYMBOL cap 336 -144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 220p
SYMBOL Misc\\EuropeanResistor 560 48 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R3
SYMATTR Value 22K
TEXT -408 120 Left 2 !.tran 0 50m 30m