I often see harmonic distortion and IMD in the freq. domain, and deviation from linearity in amplitude. Is there a corollary or some theorem in signals and systems suggesting that these three exhaust all forms of nonlinearity?
In another thread it was suggested that amplifiers might have distortions that we do not measure. I guess IMD is not thoroughly explored, only two or three frequencies are usually measured. Also, deviation from linearity is not explicitly reported with amplifiers, only the clipping point gets mentioned (I know that amps are assumed to be operating within their linear range).
My understanding is that most other reported specs would be manifest in imperfections in HD, IMD, or amplitude problems. For instance, Slew rate is supposed to show as harmonic distortion. Could there be anomalous behavior with no footprint in what we measure from frequency and amplitude responses?
In another thread it was suggested that amplifiers might have distortions that we do not measure. I guess IMD is not thoroughly explored, only two or three frequencies are usually measured. Also, deviation from linearity is not explicitly reported with amplifiers, only the clipping point gets mentioned (I know that amps are assumed to be operating within their linear range).
My understanding is that most other reported specs would be manifest in imperfections in HD, IMD, or amplitude problems. For instance, Slew rate is supposed to show as harmonic distortion. Could there be anomalous behavior with no footprint in what we measure from frequency and amplitude responses?