Version 4
SHEET 1 880 680
WIRE 128 96 16 96
WIRE 128 112 128 96
WIRE 16 208 16 96
WIRE 128 208 128 192
WIRE 128 304 128 288
WIRE 16 416 16 288
WIRE 80 416 16 416
WIRE 128 416 128 384
WIRE 128 416 80 416
WIRE 80 448 80 416
FLAG 80 448 0
SYMBOL res 112 96 R0
SYMATTR InstName R1
SYMATTR Value 1000
SYMBOL res 112 192 R0
SYMATTR InstName R2
SYMATTR Value 1000
SYMBOL res 112 288 R0
SYMATTR InstName R3
SYMATTR Value 1000
SYMBOL Misc\\battery 16 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1
TEXT 56 120 Left 0 !.op
TEXT -24 72 Left 0 ;R3=f*1000 with 0<=f<=1