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    BJT Circuit

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    With base grounded, calculate
    d) Input impedance at the emitter.
    e) Output impedance at the collector.
    f) Output impedance at the collector with a resistor R across the constant current source.

    With an impedance R' to ground at the base
    g) Impedance at the emitter.

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    a. The input impedance at the emitter can be measured across the base and emitter terminals. Since the impedance reading is ...

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    This posting contains the solution that calculates input and output impedance.