Version 4
SHEET 1 880 680
WIRE 240 -160 96 -160
WIRE 368 -160 240 -160
WIRE 368 -96 368 -160
WIRE 240 0 240 -160
WIRE 368 64 368 -16
WIRE 240 112 240 80
WIRE 304 112 240 112
WIRE 96 128 96 -160
WIRE 240 176 240 112
WIRE 368 224 368 160
WIRE 368 224 304 224
WIRE 368 240 368 224
WIRE 96 368 96 208
WIRE 240 368 240 272
WIRE 368 368 368 320
FLAG 368 368 0
FLAG 240 368 0
FLAG 96 368 0
SYMBOL voltage 96 112 R0
WINDOW 3 31 88 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value 1.7
SYMATTR InstName V1
SYMBOL npn 304 64 R0
SYMATTR InstName Q1
SYMATTR Value BC817-40
SYMBOL npn 304 176 M0
SYMATTR InstName Q2
SYMATTR Value BC847C
SYMBOL voltage 368 -112 R0
WINDOW 3 -43 86 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 -34 5 Left 2
SYMATTR Value 1
SYMATTR InstName V2
SYMBOL Misc\\EuropeanResistor 224 -16 R0
SYMATTR InstName R1
SYMATTR Value 2k
SYMBOL Misc\\EuropeanResistor 352 224 R0
SYMATTR InstName R2
SYMATTR Value 6.2
TEXT 56 432 Left 2 !.dc V1 1.7 7 .01 V2 1V 1.7V .1V