Help: Assura RCX extraction of resistors are the wrong value

[eychiem]

Hello, I am relatively new to using Assura and I really could use some help; my resistor's extracted resistances values do not match the designed values.

I am using the TSMC25rf process and I designed a differential pair gain stage with resistive loads. For the resistors I used two rphpoly resistors with a value of 3.25K ohms. I was able to get the layout to LVS match to the schematic. Everything in the layout matches the schematic, even the resistor parameters. But when I run ASSURA RCX, the av_extracted file shows different resistor values than the ones in the schematic.

Even when I change the length of the resistors in the layout, the ASSURA RCX extracted resistances values do not change.

For the Assura RCX settings, I am running the RC extraction type and in the Netlisting tab I included the model for design resistor models.

I have attached my schematic, layout and RCX settings.

If anybody has any suggestions I will greatly appreciate it.

 

[johnjoe]

If I remember correctly, ASSURA extract the parasitic resistors and capacitors (like traces) and not the component values itself!