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Change the link "bias" to directly link to the correct page for the subject (electrical engineering) |
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==Motivation==
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]].
Any nonlinear device which can be described quantitatively using a formula can then be 'linearized' about a bias point by taking partial derivatives of the formula with respect to all governing variables. These partial derivatives can be associated with physical quantities (such as [[capacitance]], [[electrical resistance|resistance]] and [[inductance]]), and a circuit diagram relating them can be formulated.
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