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PSPice Ftable Parameters

Daniel P

Hi there.

I'm developing a circuit in PSpice including an Impedance-model, which is simulated within a real and a complex part. Also can be looked like a Resistor and a Capacitor that change values according to varying the frecuency.

So, for example, I have:

@35kHz: R=2000; C=2.27nF or also can be modeled like 0-2000j or |Z|=2000 and Phase=-90º

... 

@39kHz: R=1550; C=2.39nF or also can be modeled like 202.32-1536.7j or |Z|=1550 and Phase=-82.5º 

 

and so on, until 45kHz (steps can be from 250Hz). 

 

When I try to insert this behavior into my Schematic, using FTABLE Part, I cannot get the right way to simulate whe whole circuit (the output I get has no-sense).

I know the circuit is well designed because if I put single values of a Resistor and a Capacitor instead of the FTABLE componet, I get a correct output. But that's not a polite solution, because I have many values for these components.

I'm trying to set up the FTABLE like this (Parameters are in Modulus and Phase Expression mode)

 

row1: 35kHz    2000         -90

row2: 38.5kHz     1650       -86.25

row3: 39kHz     1550       -82.5 

row4: 41.750kHz     2100       -88

row5: 45kHz     1800      -90 

 MAGUNITS=mag

 

What am I doing wrong? Do I need to change other parameters or settings in the FTABLE setup? Is there other way to do what I'm trying to?

Thank you in advance, any help will be much appreciated.

Regards,

D. 

 

Parents

  • Much appreciated for the note, but I think its not my case.

    I have two elements, R and C, and their values changing due to frecuency variation.

    What is more, I can combine them to create a Real and Complex Equivalent Impedance, because they are connected in the circuit in series mode.

    But, I cannot get the voltage outsite the Capacitor to use that kind of tables.

    I dont care about using two tables (one for R and other one for C) or one for both elements, but there must be a quite easy solution for this case, and I cannot find it. 

    I just want to avoid making a lot of simulations changing the values of R and C in each step, taking the exact value of the Output-Voltage of my circuit for each frequency, record them into a table in other software, plotting it...

    Hope its better understood now, and also anyone could help me out with this.

    Thank you in advance.

    Regards,

    D. 

Reply

  • Much appreciated for the note, but I think its not my case.

    I have two elements, R and C, and their values changing due to frecuency variation.

    What is more, I can combine them to create a Real and Complex Equivalent Impedance, because they are connected in the circuit in series mode.

    But, I cannot get the voltage outsite the Capacitor to use that kind of tables.

    I dont care about using two tables (one for R and other one for C) or one for both elements, but there must be a quite easy solution for this case, and I cannot find it. 

    I just want to avoid making a lot of simulations changing the values of R and C in each step, taking the exact value of the Output-Voltage of my circuit for each frequency, record them into a table in other software, plotting it...

    Hope its better understood now, and also anyone could help me out with this.

    Thank you in advance.

    Regards,

    D. 

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