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Way to automatically print the noise summary after noise analysis

sidm

Hi All,

I am performing noise analysis on a circuit using IC618 and as of now printing the total integrated noise summary after every iteration using the Results -> Print option.

Is there a way to automatically print the noise summary after noise analysis instead of having to do this every time using the Results -> Print -> Noise summary menu ?

thanks in advance.

regards

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  • Dear sidm,

    sidm said:
    Is there a way to automatically print the noise summary after noise analysis instead of having to do this every time using the Results -> Print -> Noise summary menu ?

    Yes. You may add the following expression as an output expression in Assembler or Explorer where fmin_Hz and fmax_Hz are the numerical values in Hertz  that you would enter on the Print Noise Summary GUI shown in Figure 1. In the example I show in Figure 2 and Figure 3 are the Noise Summary output and the Calculator output for the expression with integration limits fmin_Hz = 1e-03 Hz and fma_Hz  = 1e9 Hz. Note the total integrated noise of both is identical.

    integ((getData("out" ?result "noise")**2) fmin_Hz fmax_Hz nil )

    I hope this is what you are looking to do sidm.

    Shawn

    Figure 1

    Figure 2

    Figure 3

  • in reply to ShawnLogan

    Thank you for the reply but when trying the above expression I am getting the below error in CIW - will be helpful if you can suggest what is going wrong.

    expression evaluation failed: val is not legal.
    expression evaluation failed: integ((getData("vop" ?result "noise")**2) 0.1 500 nil )

  • in reply to sidm

    The output of a noise analysis is always called "out". It's not the name of the output signal, because when you set up the noise analysis you tell it where the output is, and all the noise contributors are computed to that specified output node. It's only possible to get the output-referred noise at a single pre-defined output, so specifying the node name makes no sense. 

    The problem is you've changed your expression to use "vop" instead of "out", and that's incorrect. Change it back to "out" and it should work.

    Andrew

  • in reply to sidm

    Dear sidm,

    sidm said:
    Thank you for the reply but when trying the above expression I am getting the below error in CIW - will be helpful if you can suggest what is going wrong.

    The error is due to the fact that you did not use the expression I provided. It should read:

    integ((getData("out" ?result "noise")**2) 0.1 500 nil )

    and not:

    integ((getData("vop" ?result "noise")**2) 0.1 500 nil )

    Shawn

Reply
  • in reply to sidm

    Dear sidm,

    sidm said:
    Thank you for the reply but when trying the above expression I am getting the below error in CIW - will be helpful if you can suggest what is going wrong.

    The error is due to the fact that you did not use the expression I provided. It should read:

    integ((getData("out" ?result "noise")**2) 0.1 500 nil )

    and not:

    integ((getData("vop" ?result "noise")**2) 0.1 500 nil )

    Shawn

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