Version 4
SHEET 1 1440 756
WIRE -112 64 -208 64
WIRE 0 64 -112 64
WIRE 160 64 80 64
WIRE 208 64 160 64
WIRE 304 64 272 64
WIRE 400 64 304 64
WIRE 512 64 400 64
WIRE 160 96 160 64
WIRE 400 112 400 64
WIRE -208 128 -208 64
WIRE -112 128 -112 64
WIRE 304 128 304 64
WIRE 112 176 -32 176
WIRE -32 208 -32 176
WIRE -208 240 -208 208
WIRE -112 240 -112 192
WIRE 160 256 160 192
WIRE 304 256 304 192
WIRE -32 304 -32 288
WIRE 0 304 -32 304
FLAG 160 256 0
FLAG -208 240 0
FLAG 304 256 0
FLAG 512 64 out
FLAG -112 240 0
FLAG -32 304 0
FLAG 400 192 0
SYMBOL ind -16 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 553µ
SYMBOL voltage -208 112 R0
SYMATTR InstName V1
SYMATTR Value 2.4V
SYMBOL diode 208 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL cap 288 128 R0
SYMATTR InstName C1
SYMATTR Value 12µF
SYMBOL cap -128 128 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL voltage -32 192 R0
WINDOW 3 -46 147 Left 2
SYMATTR Value PULSE(0 6 0 10n 10n 41u 67u)
SYMATTR InstName V2
SYMBOL res 384 96 R0
SYMATTR InstName R1
SYMATTR Value 167
SYMBOL nmos 112 96 R0
SYMATTR InstName M1
SYMATTR Value BS170
SYMATTR Prefix X
TEXT -120 440 Left 2 !.tran 20m
TEXT 376 376 Left 2 !* Model from Philips\n*\n.SUBCKT BS170 1 2 3\nCgs  2 3 12.3E-12\nCgd1 2 4 27.4E-12\nCgd2 1 4 6E-12\nM1 1 2 3 3 MOST1\nM2 4 2 1 3 MOST2\nD1 3 1 Dbody\n.MODEL MOST1 NMOS(Level=3 Kp=20.78u W=9.7m L=2u Rs=20m Vto=2 Rd=1.186)\n.MODEL MOST2 NMOS(VTO=-4.73 Kp=20.78u W=9.7m L=2u Rs=20m)\n.MODEL Dbody D(Is=125f N=1.023 Rs=1.281 Ikf=18.01 Cjo=46.3p M=.3423\n+            Vj=.4519 Bv=60 Ibv=10u Tt=161.6n)\n.ENDS