The maximum theoretical efficiency is only 25%. Further, the amplifier draws full current from the power supply regardless of whether or not a signal is present. With an applied signal, some of the po...The maximum theoretical efficiency is only 25%. Further, the amplifier draws full current from the power supply regardless of whether or not a signal is present. With an applied signal, some of the power formerly dissipated within the transistor is shifted to the load. The lower the value of θ, the more effective the heat sink is at transferring heat from the transistor to the surrounding air. What is the advantage of having a centered Q point on the AC load line?
