15.11 NETWORK FUNCTIONS AND POLE-ZERO PLOTS
Network function is a ratio of Laplace transforms. It is the ratio of Laplace transform of zero-state response to the Laplace transform of the right-sided input function causing this response. We had called it s-domain System Function till now. We use the name ‘Network Function’ synonymously from this section onwards.
But ratio of Laplace transform of zero-state response to Laplace transform of which input function? There should only be one. That is, a network function can be defined and evaluated only in an s-domain equivalent circuit containing one input source transform. Thus, the circuit should have only one independent source active when a network function is evaluated. Hence, there cannot be initial ...
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