Hybrid Equivalent Model - Ratio of input and output voltage

Q.  The parameter 'h12' is basically a ratio of input voltage to the output voltage with the input current equal to _______
- Published on 23 Sep 15

a. Unity
b. Zero
c. Infinity
d. None of the above

ANSWER: Zero

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    Discussion

  • Satyawati   -Posted on 29 Sep 15
    In hybrid equivalent model, the parameter 'h12' represents the ratio of input voltage to output voltage especially by keeping input current equal to zero. Since it is a ratio of voltage levels, it is unit-less parameter.

    It is generally obtained by open circuiting the input terminals & hence also regarded as open circuit reverse transfer voltage ratio.

    The h-parameters (h11, h12, h21, h22 ) associated with two port devices represent input impedance,voltage ratio, current gain and output conductance.

    As all the h-parameters represent different quantities, their units are also different.

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