Chapter 8, Problem D8.37P

A class−A transformer-coupled emitter follower must deliver 2W to an $8\Omega$ speaker. Let $V_{CC}=18\text{V}$ , $\beta =100$ , and $V_{BE}=0.7\text{V}$ . (a) Determine the required transformer ratio
$n_1:n_2$. (b) Determine the minimum transistor power rating.