Version 4
SHEET 1 1092 680
WIRE -336 -192 -400 -192
WIRE 0 -192 -256 -192
WIRE 368 -192 80 -192
WIRE -400 -160 -400 -192
WIRE -48 -64 -400 -64
WIRE 368 -64 368 -192
WIRE 368 -64 32 -64
WIRE -400 64 -400 -64
WIRE -288 64 -400 64
WIRE -48 64 -208 64
WIRE 80 64 -48 64
WIRE 160 64 80 64
WIRE 304 64 224 64
WIRE -48 128 -48 64
WIRE 80 128 80 64
WIRE 304 128 304 64
WIRE -400 176 -400 64
WIRE -112 176 -400 176
WIRE 368 256 368 -64
WIRE -48 304 -48 224
WIRE 80 304 80 208
WIRE 80 304 -48 304
WIRE 304 304 80 304
WIRE 368 432 368 352
FLAG -400 -160 0
FLAG 368 432 0
FLAG 304 128 0
FLAG 80 64 V
SYMBOL ind -304 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 0.1H
SYMBOL ind -64 -48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 0.1H
SYMBOL cap 224 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C
SYMATTR Value 10uF
SYMBOL voltage -240 -192 R90
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName Vs
SYMATTR Value 20V
SYMBOL res 96 -208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R
SYMATTR Value 3k
SYMBOL ind 64 112 R0
SYMATTR InstName L3
SYMATTR Value 1H
SYMBOL npn -112 224 M180
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL npn 304 256 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
TEXT 8 384 Left 2 !.tran 0 1.2 1 0.001
TEXT 8 424 Left 2 !.ic I(L1)=0