How can I do cvc check for analog circuits?

You’ll need to create a

cvc.power

file that defines the analog signals. There’s a template here https://github.com/d-m-bailey/extra_be_checks/blob/main/tech/sky130A/cvc.power.user_analog_project_wrapper You’ll probably need to split the buses if the usage differs. Be warned: cvc is likely to flag false errors in analog circuits. You mean cvc, the reliability check, right? If you mean cvc, the verilog check, that’s a different problem.