open-source-silicon.dev

Hi, I am trying to run the LVS but after extracting the layout I get some big floating capacitors, is there any way to get rid of them without using shorter connections? thanks

The commands I use for LVS extraction are
```load &lt;cell&gt;
extract no all
extract do aliases
extract do local
extract unique
extract

ext2spice lvs
ext2spice merge conservative
ext2spice short resistor
ext2spice -o &lt;cell&gt;.gds.spice &lt;cell&gt;.ext```
Replace `&lt;cell&gt;` with your top cell.

<@U051SNVC6PN>:  You are not using `ext2spice lvs` and so you are getting parasitic capacitors in your netlist output, which is not what you want to do for LVS.

Thank you so much, you are right <@U017X0NM2E7> <@U016EM8L91B>

ext2spice lvs ignores all of the capacitors? what if I also got capacitors (mimcap2) and want them to be extracted but not the parasitics.

No, `ext2spice` with option `lvs` (or equivalently option `cthresh infinite`) ignores all _parasitic_ capacitances.  MiM caps are devices and are extracted as such.