Concept

Nonlinear distortion

Résumé
Nonlinear distortion is a term used (in fields such as electronics, audio and telecommunications) to describe the phenomenon of a non-linear relationship between the "input" and "output" signals of - for example - an electronic device. Model For many devices, a linear model is accurate only for small signal levels. For example, at 2 volts input, a typical audio amplifier might put out 20 V, meaning the linear gain is 10 V/V. For 3 V input, it might then output 30 V. However, the model implies that at 50 V input it would produce 500 V, which is not possible with most amplifiers. Mathematically, the input-output relationship of many devices should be described by a polynomial or Taylor series, as shown below. v = \sum_{k=1}^\infty a_ku^k For larger values of u, the higher order coefficients such as a_2 and a_3 come into play. Effects of nonlinearity Nonlinearity can have several effects, which are unwanted in typical situati
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