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TINA/Spice/TINA-TI: TINA-TI

GIULIANO CORTICELLI
Prodigy 40 points
Part Number: TINA-TI

Tool/software: TINA-TI or Spice Models

Hello, TINA-TI community; I'm rapid: I use TINA since several years, with good results about Transient and AC steady state solver (grafical solution), but I'm unable to obtain a correct "Table of AC results": whatever I make before asking the table (about simulation parameters, searching time, convergence method, initial conditions, etc) the result is always a "near zero" Ac Table, tha is, every current/voltahe/power has 10E-12...10E-15 magnitude order; I tryed with almos 30 different circuits, but with the same (zero) result; I'm sure I'm silly and I make something wrong, so excuse me,please for this simple question; someone can help me, describing exactly the sequence of commands that lead to the "steady state table of AC results"? Grateful to you, Giuliano

  • 0
    TI__Genius 9775 points
    Hi Giuliano,

    The Table of AC results are not for "Steady State Table of AC results". Rather as described in the help menu, it is for showing the operating point that will be used for AC analysis.

    Here is the excerpt from the help menu in TINA (AC Analysis -> Table of AC results -> Help ):

    Analysis | AC Analysis | Table of AC Results
    This command calculates the AC operating point in the same way as the
    AC Analysis.Calculate operating point command, but it presents the results in table form.

    Hope this helps,
    Herman
  • 0 in reply to Herman Theodorus
    Prodigy 40 points

    Hi Herman, many many thanks for the time you gave to me. If I well understood, the "Table of Ac Result" is related to ONLY ONE working Frequency; Can you confirm this to me, please?

    And, if so, I add: Is possible to have in a single table all AC RMS VALUES? (Voltage and current)? This is one of the main informations I need when examining an AC Circuit.

    About this topic, can you help me?

    Grateful for your answer

    Giuliano

  • 0 in reply to GIULIANO CORTICELLI
    TI__Genius 9775 points
    Hi Giuliano,

    Yes, for Table of AC result, it is related to operating point (the dc operating point) or if we tie this to working frequency, it is related to only one working frequency which is 0 Hz (0 Hz = dc operating point)

    We don't have the the single table for RMS values in TINA.

    Herman
  • 0 in reply to Herman Theodorus
    Prodigy 40 points
    Thanks Herman; at the last, the only way to calculate an AC complex rms value is to right-click on the displayed curve, call"fourier series analysis", ask for "rms /fi" Format, and execute SQRT (SQR(A1)+SQR(A2)+SQR(A3)...) for an adequate number of harmonics of generator frequency (one MUST be present). Is it correct? After this answer, we can close my request. Grateful for your reply. Giuliano
  • 0 in reply to GIULIANO CORTICELLI
    TI__Genius 9775 points
    Hi Giuliano,

    I am assuming when you say "AC complex rms value", you're alluding "Transient Simulation at certain frequencies. Because if you're doing pure "AC Analysis", then you will not be able to do Fourier series etc.

    So under transient simulation assumption, then the easiest way you calculate the RMS value is by:
    1. Left click the displayed curve
    2. Go to the upper menu -> Process -> Averages and over there you could be able to see "RMS Values".

    Herman
  • 0 in reply to Herman Theodorus
    Prodigy 40 points
    Hi Herman, You're GREAT! You conveniently corrected/specified my answer, and your final suggestion is the one I need; Immediately I tried on a my "under-test-circuit" and I find the result you predicted; this is very important for me; Your help was excellent; but I (at last) ask you this (last) thing: WHERE could I find this information, without bore you? Does a document exist with all these informations? I looked for it, but I was unable to find; surely it's my fault, I was silly, so please excuse me, but If you have this last suggestion I'll be very grateful to you (I already am). Have a great WE. Giuliano