Hi, I have a common base amplifier circuit but im not sure of the equation to use to calculate the voltage gain? Could someone help me please
Av = gmRl where gm is the transconductance of the transistor and Rl is the equivalent load resistance at the drain/emitter. If it is a BJT then gm is Ic/vt where Ic is the collector current and vt is the thermal voltage kT/q.