This is the first part of a series of videos on the analysis, and design of a forward converter. In this first video, I first analyze a Buck converter because a Forward converter is a Buck converter with isolation. Therefore, the analysis applies to the forward converter. I show how to construct the "Ton" and the "Toff" circuit and derived two equations for the inductor voltage and use the Volt-Second rule to derive a transfer function. Questions or comments are welcomed.