I'm using the Microwave Office simulating software to design a practice clapp oscillator (picture attached). I'm at the beginning stages of this project. I will have to design a biasing network for this circuit but, before that, I need to find the formula to find the resonant frequency for this general schematic. My question is, using an NMOS, should I replace the circuit by its small circuit equivalent circuit? That would help me by ignoring the sources (since it only has DC sources). Also, would I have to consider the internal capacitances of the NMOS?