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New Micro-Cap 9 Features

Distortion Analysis

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Distortion analysis is a type of transient analysis that applies a single frequency sinusoidal signal to the named input source and measures the resulting distortion in the specified output expression using the IHD (Individual Harmonic Distortion) function.

If a pure single frequency sinusoidal signal at a specified frequency is applied to the circuit input and if the circuit is perfectly linear, the output will contain signal level only at the frequency of the input. The spectral content of the input and output will be the same except perhaps for a scale factor. There will be no distortion. To the extent that the circuit isn't perfectly linear, some output signal level will be found at frequencies other than the input frequency. In other words, some distortion will occur. The IHD function shows the distortion at each harmonic frequency as a percent of the signal level at the fundamental frequency.