Hello everyone, I have a question, is there any voltage controlled capacitors in the pdk?

Hi Antony, you find voltage controlled capacitors in the PDK here: https://antmicro-skywater-pdk-docs.readthedocs.io/en/latest/rules/device-details.html#varactors In xschem there are two symbols

cap_var_lvt

and

cap_var_hvt

that you can use for your schematics.