Are there exceptions to adding h parameters in feedback problems of amplifiers?

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SUMMARY

In feedback problems of amplifiers, H feedback parameters in voltage-controlled voltage sources are typically combined by simply adding the individual h parameters of the amplifier and the feedback network. However, exceptions exist where the loading effects can alter the individual parameters, leading to a change in the overall feedback behavior. This phenomenon necessitates a deeper analysis of the interaction between the amplifier and the feedback network to understand the potential variations in h parameters.

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  • Understanding of H parameters in amplifier circuits
  • Familiarity with voltage-controlled voltage sources
  • Knowledge of feedback network configurations
  • Basic principles of loading effects in electronic circuits
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Electrical engineers, students studying amplifier design, and professionals working with feedback systems in electronic circuits will benefit from this discussion.

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Homework Statement



In feedback problems of amplifiers we often use H feedback in the voltage controlled voltage sources... The good thing about that is that they are connected in series parallel form and they are then to find the net h parameters we simply add the h parameters of the amplifier (taken alone) to the h parameters of the feedback network (taken alone) respectively.

I was wondering if there are exceptions to this rule... I mean we connect the amplifier to the feedback network then isn't there a possibility that the individual parameters kind of change, maybe because of loading or something alike... Or is it impossible to happen. Can you give me some proofs?


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