Imperfections and Possible Advances in Analog Summing Amplifier Design

Kovinic M, Drincic D, Jankovic S. Imperfections and Possible Advances in Analog Summing Amplifier Design. In: AES Convention 125. Audio Engineering Society; 2008. Paper 7569. Available from: https://aes.org/publications/elibrary-page/?id=14721

@inproceedings{Kovinic2008_14721,
  author = {Kovinic, Milan and Drincic, Dragan and Jankovic, Sasha},
  title = {{Imperfections and Possible Advances in Analog Summing Amplifier Design}},
  booktitle = {AES Convention 125},
  note = {Paper 7569},
  year = {2008},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14721}
}

TY  - CPAPER
TI  - Imperfections and Possible Advances in Analog Summing Amplifier Design
AU  - Kovinic, Milan
AU  - Drincic, Dragan
AU  - Jankovic, Sasha
T2  - AES Convention 125
M1  - Paper 7569
PY  - 2008
DA  - 2008/10/06
UR  - https://aes.org/publications/elibrary-page/?id=14721
PB  - Audio Engineering Society
LA  - en
AB  - The major requirement in the design of the analogue summing amplifier is the quality of the summing bus. The key problem in most common designs is the artefact of summing bus impedance, which cannot be considered as true physical impedance, because it has been generated by negative feedback. The loop gain of the amplifier used will limit the performance at higher audio frequencies where the loop gain is lower, increasing the channels cross talk. The inevitable effect of heavy feedback is the increased susceptibility of the amplifier to oscillate as well as sensitivity to RFI. The advanced solution, presented in this work, could be seen in the usage of the transistor common-base pair (CB-CB) configuration as a summing bus. The CB pair offers inherent low-input impedance, low-noise, very good frequency response, and, very importantly, makes the application of total feedback not necessarily.
ER  -