convert circuit simulation data to transfer function

Question

Ge Lei 2013-4-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72221-convert-circuit-simulation-data-to-transfer-function

回答： Sabin 2025-6-26

From circuit simulation,I get a series of data about frequency、magnitude and phase.Now,I want to convert the simulation data to a transfer function.Then,I can get the characteristic of this circuit.

So,I want to get some help here. Can anyone help me ? Thank you very much!

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Azzi Abdelmalek 2013-4-16

Can you explain what is circuit simulation?

Ge Lei 2013-4-16

编辑：Ge Lei 2013-4-16

Thank you Azzi Abdelmalek! I get the simulation data by some software likes the Pspice or Powersim. I do not know whether this web can attach the simulation data. The data likes:

Frequency ; amp(Vo1) ; phase(Vo1)

1.000000000E+002 ; 8.880345651E+001 ; -1.770624284E+002

1.202264435E+002 ; 9.263054272E+001 ; -1.770466478E+002

1.445439771E+002 ; 9.493598924E+001 ; -1.769867984E+002

. . .

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Answer 1

Sabin 2025-6-26

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https://ww2.mathworks.cn/matlabcentral/answers/72221-convert-circuit-simulation-data-to-transfer-function#answer_1567192

It is possible to use tfest to estimate transfer function model using the time-domain or frequency-domain data. Check out more about how to use this function in the documentation:

https://mathworks.com/help/ident/ref/tfest.html