Version 4
SHEET 1 880 680
WIRE 144 16 -32 16
WIRE 320 16 144 16
WIRE 144 48 144 16
WIRE -32 80 -32 16
WIRE 320 96 320 16
WIRE 144 144 144 128
WIRE 256 144 144 144
WIRE 144 160 144 144
WIRE -32 208 -32 160
WIRE 320 208 320 192
WIRE 320 208 208 208
WIRE 320 240 320 208
WIRE -32 352 -32 288
WIRE 144 352 144 256
WIRE 144 352 -32 352
WIRE 320 352 320 320
WIRE 320 352 144 352
WIRE 320 368 320 352
FLAG 320 368 0
SYMBOL Misc\\battery -32 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL Misc\\battery -32 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value SINE(0 3 1)
SYMBOL res 128 32 R0
SYMATTR InstName R1
SYMATTR Value 22K
SYMBOL res 304 224 R0
SYMATTR InstName R2
SYMATTR Value 22R
SYMBOL npn 256 96 R0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL npn 208 160 M0
SYMATTR InstName Q2
SYMATTR Value 2N2222
TEXT -66 392 Left 2 !.tran 2