Help with the simulation of this circuits

Hello I'm having some problems trying to simulate this circuits

This is a cmos oscillator. I want to make a HARMONIC BALANCE SIMULATION WITH A SINGLE TONE.
How i connect the terminal port etc.

I"m using ADS but i would be great if anyone can do this with cadence

you have to capacitively decouple the input and output in ADS for harmonic balance. What specific issue are you having? just connect the input and output termination (with dc block as mentioned above)

The thing is i want to know how i make the buffer for the outputs, Vo+ y Vo- . The HB simulation in this case has not an a signal power input , just the dc voltage Vib.
And one more thing can i use varactors using PMOS transistor?