Input impedance

What is Input Impedance of Electrical Circuit:

The input impedance of an electrical network is the equivalent impedance ”seen” by a power source connected to that network. If the source provides known voltage and current, such impedance can be calculated using Ohm’s Law. The input impedance is the Thévenin’s equivalent circuit of the electrical network, modeled by an RL (resistor-inductor) or an RC (resistor-capacitor) combination, with equivalent values that would result in the same response as that of the network. It is also called Z11 in terms of Z-parameters. Generally speaking, the exact definition depends on the particular field of study.

What is Input Impedance, Definition of Input Impedance, Define Input Impedance

Simple source and load circuit (ZS is the output impedance seen by the load, and ZL is the input impedance seen by the source).

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