Finding Input/Output Impedance of a CE Amplifier: Practical Methods

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how can i find input and output impedance of a ce amplifier- (voltage divider )..suggest practical methods?
 
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The basic steps are:

  1. Determine the small-signal hybrid-pi model parameters for the transistor
  2. Write the KVL loop equations for the input and the output (bias circuits and hybrid-pi)
  3. Manipulate algebraically to the input and output driving-point impedances
 

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