Version 4
SHEET 1 880 680
WIRE 176 112 80 112
WIRE 336 112 256 112
WIRE 80 128 80 112
WIRE 336 128 336 112
WIRE 80 224 80 208
WIRE 336 224 336 208
FLAG 80 224 0
FLAG 336 224 0
SYMBOL voltage 80 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 1V
SYMATTR Value2 ""
SYMATTR SpiceLine ""
SYMBOL res 320 112 R0
SYMATTR InstName R1
SYMATTR Value {R1}
SYMBOL res 272 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 50
SYMATTR SpiceLine ""
TEXT 272 264 Left 2 !.step param R1 1 1000 50
TEXT 46 284 Left 2 !;tran 0.01
TEXT 440 96 Left 2 !.op