Hi there,

I've been trying to use the $table_model function to model up a voltage reference with the results of my schematic simulation.

My tables got 3 columns (trimming / temperature / current or voltage )

What happens is when performing a DC varying temperature and trimming, spectre is returning some wrong data.

Like this:

Trimming Temperature Current

#end of table 30

30         1.05E2           8.04E-7
30           1.25E2           8.14E-7

# beggining of table 31
31           -40                -4.21E-8
31           -30                -5.01E-8

When the input is (31, -40) spectre is still returning the output of (30,125), what mess up the entire results.
It ignores the (31,-40) input.

Can anyone help me out ?
I am using the command $table_model(trim variable, temperature variable, data file, "2");

I think the problem is the interpolation control carachter "2" but I don't know what to use instead.

Thank you.  

Hi Patrick, thank you for your answer.

Well that's exactly what I want, discrete look-up, I just want these values to turn out.

I did what you said, but it's returning an error like this:

$table_model failed: Expected but did not find a value at this dimension during Discrete Interpolation. Correct the problem and try again.

Edit: Just to let you know, it seems the problem was solved out by using "D,1". Anyway, I still don't know why it doesnt accept "D,D".

My take is that "D" is causing an error with the real notation in the table. You could try to verify this by replacing the 1.25E2 with 125 in the table (and all similar notations in the 2nd column, of course).

Marq