Small-signal model: Difference between revisions

Revision as of 20:41, 16 February 2007

Revision as of 20:42, 16 February 2007

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ÚÚÚÚÚ'''Small signal modeling''' is a common analysis method used in [[electrical engineering]] to describe [[nonlinear device]]s in terms of [[linear equations]]. The basic idea is to first calculate (possibly by an [[iterative]] process if the circuit is complex) the levels that will be present when no signal is applied, then form linear approximations for the deviations from that base state.

==Motivation==Śú→

Electronic circuits generally involve small time-varying signals carried over a constant [[bias (electrical engineering)|bias]]. This suggests using a method akin to approximation by [[differentials]] to analyze relatively small perturbations about the [[bias point]].