Estimates of Nonlinear Distortion in Feedback Amplifiers

Cherry EM. Estimates of Nonlinear Distortion in Feedback Amplifiers. J Audio Eng Soc. 2000;48(4):299-313. Available from: https://aes.org/publications/elibrary-page/?id=12068

@article{Cherry2000_12068,
  author = {Cherry, Edward M.},
  title = {{Estimates of Nonlinear Distortion in Feedback Amplifiers}},
  journal = {Journal of the Audio Engineering Society},
  volume = {48},
  number = {4},
  pages = {299--313},
  year = {2000},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12068}
}

TY  - JOUR
TI  - Estimates of Nonlinear Distortion in Feedback Amplifiers
AU  - Cherry, Edward M.
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 48
IS  - 4
SP  - 299
EP  - 313
PY  - 2000
DA  - 2000/04/06
UR  - https://aes.org/publications/elibrary-page/?id=12068
PB  - Audio Engineering Society
LA  - en
AB  - A method is proposed for characterizing nonlinear distortion in feedback amplifiers by means of two generators at the input - one voltage and one current. These generators are the negatives of the voltage and current antidistortion which, added to voltage-source and current-source input, respectively, would reduce the output distortion to zero. Their values can be calculated easily from known variations of small-signal parameters such as transistor gm, ß, and the capacitances. The distortion-to-signal ratio is given by formulas similar to the offset-to-signal ratio or noise-to-signal ratio, and depends only on the distortion generators, the signal source, and the source impedance. The method correctly predicts harmonic and intermodulation distortion for practical amplifiers. It points toward techniques for reducing distortion, and it explains certain experimental results which hitherto have been problematical.
ER  -