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Common base amplifier voltage gain

  1. Apr 21, 2013 #1

    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
  2. jcsd
  3. Apr 21, 2013 #2
    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.
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