Question

Formula for input resistance of common emitter transistor amplifier is

Answer 1

The output impedance of a common emitter stage is just equal to the collector resistor in parallel with the load resistor (R. RL) if connected otherwise its just RC. The voltage gain, Av of the amplifier is dependant upon RC/RE.

Answer 2

Answer:

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• For a common emitter amplifier using an n-p-n transistor, input signal is given by the equation vi=5cos(15t+π/3).