A Current-Feedback Audio Power Amplifier

Alexander M. A Current-Feedback Audio Power Amplifier. In: AES Convention 88. Audio Engineering Society; 1990. Paper 2902. Available from: https://aes.org/publications/elibrary-page/?id=5792

@inproceedings{Alexander1990_5792,
  author = {Alexander, Mark},
  title = {{A Current-Feedback Audio Power Amplifier}},
  booktitle = {AES Convention 88},
  note = {Paper 2902},
  year = {1990},
  month = mar,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=5792}
}

TY  - CPAPER
TI  - A Current-Feedback Audio Power Amplifier
AU  - Alexander, Mark
T2  - AES Convention 88
M1  - Paper 2902
PY  - 1990
DA  - 1990/03/06
UR  - https://aes.org/publications/elibrary-page/?id=5792
PB  - Audio Engineering Society
LA  - en
AB  - A new low cost, high performance audio power amplifier topology that uses current-feedback in the main gain stage is described. This technique, which has previously been restricted mainly to wideband and video amplifier circuit design, improves on the more common, voltage-feedback amplifier topology by providing a wide closed-loop bandwidth relatively independent of gain, and very high slew-rates. Measurements on the prototype power amplifier show that a closed-loop bandwidth of 1 MHz, at a gain of 24, and slew-rates in excess of 200 V/µs are readily achievable with inexpensive off-the-shelf components. In addition, the in-band harmonic distortion is quite low (<0.002% at 1kHz), due to the large loop gain that is achievable at audio frequencies.
ER  -