Version 4
SHEET 1 1028 680
WIRE 368 -256 -144 -256
WIRE 704 -256 368 -256
WIRE 960 -256 704 -256
WIRE 368 -192 368 -256
WIRE 960 -160 960 -256
WIRE 704 -128 704 -256
WIRE 368 -80 368 -112
WIRE 576 -80 368 -80
WIRE 640 -80 576 -80
WIRE 368 -16 368 -80
WIRE 704 16 704 -32
WIRE 800 16 704 16
WIRE 928 16 880 16
WIRE 960 16 960 -96
WIRE 960 16 928 16
WIRE 160 32 64 32
WIRE 272 32 240 32
WIRE 304 32 272 32
WIRE 704 64 704 16
WIRE 576 112 576 -80
WIRE 640 112 576 112
WIRE -144 160 -144 -256
WIRE 64 160 64 32
WIRE 704 176 704 160
WIRE 800 176 704 176
WIRE 272 192 272 32
WIRE 368 192 368 80
WIRE 704 192 704 176
WIRE 800 192 800 176
WIRE -144 304 -144 240
WIRE 64 304 64 240
WIRE 64 304 -144 304
WIRE 272 304 272 272
WIRE 272 304 64 304
WIRE 368 304 368 272
WIRE 368 304 272 304
WIRE 704 304 704 272
WIRE 704 304 368 304
WIRE 800 304 800 256
WIRE 800 304 704 304
WIRE 64 384 64 304
FLAG 64 384 0
FLAG 928 16 gate
SYMBOL voltage 64 144 R0
WINDOW 3 -112 362 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 10.5 0 10n 10n 2µ 5µ)
SYMATTR InstName V1
SYMBOL voltage -144 144 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 30
SYMBOL Misc\\EuropeanResistor 352 176 R0
SYMATTR InstName R1
SYMATTR Value 1K
SYMBOL npn 304 -16 R0
SYMATTR InstName Q1
SYMATTR Value BC847B
SYMBOL Misc\\EuropeanResistor 352 -208 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL Misc\\EuropeanResistor 256 16 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 8K2
SYMBOL npn 640 -128 R0
SYMATTR InstName Q2
SYMATTR Value BC847B
SYMBOL Misc\\EuropeanResistor 896 0 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 47
SYMBOL cap 944 -160 R0
SYMATTR InstName C1
SYMATTR Value 250p
SYMBOL Misc\\EuropeanResistor 256 176 R0
SYMATTR InstName R6
SYMATTR Value 1K5
SYMBOL pnp 640 160 M180
SYMATTR InstName Q3
SYMATTR Value BC857B
SYMBOL Misc\\EuropeanResistor 688 176 R0
SYMATTR InstName R5
SYMATTR Value 2.2K
SYMBOL cap 784 192 R0
SYMATTR InstName C2
SYMATTR Value 22n
TEXT 32 408 Left 2 !.tran 0 2050µ 2020µ