To start things off I am using:
I’m trying to minimize parasitics in a circuit and I’ve encountered something weird.
Upon completing a clean LVS, I run QRC and create two av_extracted views, one with “RC” Extraction Type and the other with “C Only” Extraction Type. I call them av_extracted_RCs and av_extracted_Cs accordingly.
I'm trying to minimize parasitics in a circuit, and I’m using the Parasitics-> Report Parasitics ->Net Capacitors to view my progress. I have encountered something weird when I look at the net capacitances. There is a difference in the total net capacitance whether I load av_extracted_RC or av_extracted_C! If I load my av_extracted_Cs it reports a total net capacitance X fF for a given net x, but if I load my av_extracted_RCs it reports more net capacitance (Y) fF for the same net x.
Why does the extracted view with RCs show more net capacitance than the extracted view with only Cs? This is puzzling me and I hope someone has encountered this before. Thanks in advance.