Version 4
SHEET 1 880 680
WIRE 240 48 64 48
WIRE 272 48 240 48
WIRE 384 48 352 48
WIRE 496 48 384 48
WIRE 64 128 64 48
WIRE 240 128 240 48
WIRE 384 128 384 48
WIRE 496 128 496 48
WIRE 64 288 64 208
WIRE 240 288 240 208
WIRE 240 288 64 288
WIRE 384 288 384 208
WIRE 384 288 240 288
WIRE 496 288 496 208
WIRE 496 288 384 288
WIRE 240 320 240 288
FLAG 240 320 0
FLAG 384 48 VX
SYMBOL res 48 112 R0
SYMATTR InstName R1
SYMATTR Value 6
SYMBOL current 240 208 R180
WINDOW 0 24 80 Left 2
WINDOW 3 24 0 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName I1
SYMATTR Value 10
SYMBOL res 480 112 R0
SYMATTR InstName R2
SYMATTR Value 999999999
SYMBOL res 368 112 R0
SYMATTR InstName R3
SYMATTR Value 2
SYMBOL bv 256 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName B1
SYMATTR Value V=2*V(VX)
TEXT 46 344 Left 2 !.op