* SPICE netlist
Q1 N001 N002 N004 0 BC337-40
Q2 0 N002 N004 0 BC327-40
V1 N001 0 12
V2 pulse_source 0 PULSE(0 5 1n 1n 1n 500n 40u)
Q3 N005 pulse_source N010 0 BC847B
R1 gate N004 10
R2 N001 P001 5
M1 P001 gate 0 0 BSB015N04NX3
R6 N010 0 680
Q4 N008 N006 N003 0 BC327-40
R7 N001 N003 220
C1 N001 N003 220p
Q5 N002 N005 N001 0 BC327-40
R8 N001 N006 330
R9 N001 N005 330
Q6 N002 N008 0 0 BC337-40
R10 N008 0 330
Q7 N006 N009 N010 0 BC847B
R3 N001 N007 1k
R4 N007 0 470
R5 pulse_source 0 10k
R11 N001 N009 10k
R12 N007 pulse_source 470
R13 N007 N009 470
.tran 0 200u 0 10n startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2400 800
WIRE -608 -384 -880 -384
WIRE -208 -384 -608 -384
WIRE -80 -384 -208 -384
WIRE 112 -384 -80 -384
WIRE 208 -384 112 -384
WIRE 320 -384 208 -384
WIRE 560 -384 320 -384
WIRE 800 -384 560 -384
WIRE 1200 -384 800 -384
WIRE 800 -352 800 -384
WIRE -208 -336 -208 -384
WIRE 112 -320 112 -384
WIRE -608 -304 -608 -384
WIRE 320 -304 320 -384
WIRE 560 -304 560 -384
WIRE 208 -288 208 -384
WIRE -880 -256 -880 -384
WIRE 496 -256 448 -256
WIRE 912 -256 800 -256
WIRE -80 -208 -80 -384
WIRE 320 -208 320 -240
WIRE 320 -208 208 -208
WIRE 560 -192 560 -208
WIRE 624 -192 560 -192
WIRE 720 -192 720 -288
WIRE 720 -192 704 -192
WIRE 752 -192 720 -192
WIRE -208 -160 -208 -256
WIRE -208 -160 -672 -160
WIRE -144 -160 -208 -160
WIRE 112 -160 112 -240
WIRE 144 -160 112 -160
WIRE 560 -160 560 -192
WIRE 448 -112 448 -256
WIRE 448 -112 400 -112
WIRE 496 -112 448 -112
WIRE 112 -96 112 -160
WIRE 112 -96 -384 -96
WIRE -880 -80 -880 -176
WIRE -752 -80 -880 -80
WIRE 800 -64 800 -176
WIRE 800 -64 560 -64
WIRE -80 -32 -80 -112
WIRE 400 -32 400 -112
WIRE 400 -32 -80 -32
WIRE -880 16 -880 -80
WIRE -1072 64 -1200 64
WIRE -752 128 -752 -80
WIRE -512 128 -752 128
WIRE 560 128 560 -64
WIRE -80 176 -80 -32
WIRE -752 192 -752 128
WIRE -752 192 -832 192
WIRE -384 208 -384 -96
WIRE -672 224 -672 -160
WIRE 208 224 208 -112
WIRE 208 224 -16 224
WIRE -608 256 -608 -224
WIRE -512 256 -512 208
WIRE -512 256 -608 256
WIRE -448 256 -512 256
WIRE -1072 272 -1072 64
WIRE -832 272 -1072 272
WIRE -736 272 -832 272
WIRE -832 304 -832 272
WIRE -384 320 -384 304
WIRE -384 320 -672 320
WIRE -80 368 -80 272
FLAG -1200 144 0
FLAG -1072 64 pulse_source
FLAG 912 -256 out
FLAG 720 -288 gate
FLAG 560 128 0
FLAG -672 400 0
FLAG 208 304 0
FLAG -80 368 0
FLAG -880 96 0
FLAG -832 384 0
FLAG 1200 -304 0
SYMBOL npn 496 -304 R0
SYMATTR InstName Q1
SYMATTR Value BC337-40
SYMBOL pnp 496 -64 M180
SYMATTR InstName Q2
SYMATTR Value BC327-40
SYMBOL voltage 1200 -400 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL voltage -1200 48 R0
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 1n 1n 1n 500n 40u)
SYMBOL npn -736 224 R0
SYMATTR InstName Q3
SYMATTR Value BC847B
SYMBOL res 720 -208 R90
SYMATTR InstName R1
SYMATTR Value 10
SYMBOL res 784 -368 R0
SYMATTR InstName R2
SYMATTR Value 5
SYMBOL nmos 752 -272 R0
SYMATTR InstName M1
SYMATTR Value BSB015N04NX3
SYMBOL res -688 304 R0
SYMATTR InstName R6
SYMATTR Value 680
SYMBOL pnp 144 -112 M180
SYMATTR InstName Q4
SYMATTR Value BC327-40
SYMBOL res 192 -304 R0
SYMATTR InstName R7
SYMATTR Value 220
SYMBOL cap 304 -304 R0
SYMATTR InstName C1
SYMATTR Value 220p
SYMBOL pnp -144 -112 M180
SYMATTR InstName Q5
SYMATTR Value BC327-40
SYMBOL res 96 -336 R0
SYMATTR InstName R8
SYMATTR Value 330
SYMBOL res -224 -352 R0
SYMATTR InstName R9
SYMATTR Value 330
SYMBOL npn -16 176 M0
SYMATTR InstName Q6
SYMATTR Value BC337-40
SYMBOL res 192 208 R0
SYMATTR InstName R10
SYMATTR Value 330
SYMBOL npn -448 208 R0
SYMATTR InstName Q7
SYMATTR Value BC847B
SYMBOL res -896 -272 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res -896 0 R0
SYMATTR InstName R4
SYMATTR Value 470
SYMBOL res -848 288 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res -624 -320 R0
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL res -848 176 R0
SYMATTR InstName R12
SYMATTR Value 470
SYMBOL res -528 112 R0
SYMATTR InstName R13
SYMATTR Value 470