Simulating resistor failed

[Falcon120864]

Hi,

In the circuit given after this message I tried to simulate resistor R1 (140 ohm) with active current/voltage générator R2 (using the fact that R=U/I) but one can see using I1 and I2 (I1 on and I2 off : R2, I1 off and I2 on : R1) that AOP's output is not the same. Is it a bug or did I make a mistake ?

$ 65 0.0000049999999999999996 10.634267539816555 50 5 50 5e-11 a 224 256 352 256 8 5 0 1000000 0.13961011721386157 0.1396102103025754 1000000 R 144 64 144 48 0 0 40 5 0 0 0.5 r 192 96 192 176 0 49100 r 224 192 352 192 0 60400 r 224 320 352 320 0 105800 r 192 320 192 384 0 1000 w 192 240 192 176 0 w 192 240 192 320 0 w 224 240 224 192 0 w 224 320 224 272 0 r 80 96 80 176 0 4990 w 80 176 80 256 2 w 144 448 192 448 0 w 80 96 144 96 0 w 144 64 144 96 0 w 144 96 192 96 0 g 192 448 192 464 0 0 w 352 256 352 320 0 w 352 256 352 192 0 w 352 256 432 256 2 213 -16 320 64 320 0 2 (a-b)/140 w 80 272 -16 272 0 w -16 272 -16 320 2 w 80 448 -16 448 0 w -16 432 -16 352 0 r 144 304 144 384 0 140 w 80 320 80 272 1 s 144 448 144 384 0 0 false w 192 384 192 448 0 w 80 448 144 448 0 w 80 432 80 448 0 w -16 432 -16 448 0 s 80 432 80 368 0 1 false w 80 368 80 352 0 w 80 272 80 256 0 w 192 240 224 240 0 w 144 304 144 272 0 w 80 272 144 272 0 w 144 272 176 272 0 w 176 272 176 256 0 w 176 256 208 256 0 w 208 256 208 272 0 w 208 272 224 272 0 x 32 407 52 410 4 24 I1 x 109 420 129 423 4 24 I2 x 102 349 132 352 4 24 R1 x 214 365 244 368 4 24 R1 x -57 341 -27 344 4 24 R2

[pfalstad]

You need a minus sign in the output function.

https://tinyurl.com/2q57tkzp

[Falcon120864]

Ok, I just found it before reading your answer, your sign convention is not the same as mine. Ok

Thanck you.

[Falcon120864]

By the way I would like to have a resistor voltage driven active generator as new component.

[pfalstad]

what do you mean, "resistor voltage driven active generator" ?

[Falcon120864]

A resistor between node C and D like Rcd = f(A,B) with A and B two potentials (a quadripole like your other active generators with A-B as input and C-D as output).

[Falcon120864]

The final circuit simulating a PT100 temperature sensor shown here :

https://poujouly.net/2016/07/21/une-interface-a-ampli-op-pour-une-sonde-pt100/

$ 65 0.0000049999999999999996 10.634267539816555 50 5 50 5e-11 a 224 256 352 256 8 5 0 1000000 0.17754054642666364 0.17754301510356665 1000000 R 144 64 144 48 0 0 40 5 0 0 0.5 r 192 96 192 176 0 49100 r 224 192 352 192 0 60400 r 224 320 352 320 0 105800 r 192 320 192 384 0 1000 w 192 240 192 176 0 w 192 240 192 320 0 w 224 240 224 192 0 w 224 320 224 272 0 r 80 96 80 176 0 4990 w 80 176 80 256 0 w 144 448 192 448 0 w 80 96 144 96 0 w 144 64 144 96 0 w 144 96 192 96 0 g 192 448 192 464 0 0 w 352 256 352 320 0 w 352 256 352 192 0 w 352 256 432 256 2 213 -16 320 64 320 0 2 (-a)/(100(1\p0.0013.9083b-5.7750.0000001bb)) w 80 272 -16 272 0 w -16 272 -16 320 0 w 80 320 80 272 0 w 192 384 192 448 0 w 80 448 144 448 0 w 80 432 80 448 0 w 80 432 80 352 0 w 80 272 80 256 0 w 192 240 224 240 0 w 80 272 144 272 0 w 144 272 176 272 0 w 176 272 176 256 0 w 176 256 208 256 0 w 208 256 208 272 0 w 208 272 224 272 0 174 -128 256 -96 432 0 100000 0.005 Resistance w -96 352 -16 352 2 w -128 448 80 448 0 R -128 256 -128 192 0 0 40 200 0 0 0.5 x -93 324 -26 327 4 12 Temperature x 415 243 439 246 4 12 Vout