Reducing Condenser Microphone Distortion Using a Single Chip Phantom Power Circuit

Germann A, Kist J. Reducing Condenser Microphone Distortion Using a Single Chip Phantom Power Circuit. In: AES Convention 153. Audio Engineering Society; 2022. Paper 13. Available from: https://aes.org/publications/elibrary-page/?id=21893

@inproceedings{Germann2022_21893,
  author = {Germann, Axel and Kist, Joost},
  title = {{Reducing Condenser Microphone Distortion Using a Single Chip Phantom Power Circuit}},
  booktitle = {AES Convention 153},
  note = {Paper 13},
  year = {2022},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=21893}
}

TY  - CPAPER
TI  - Reducing Condenser Microphone Distortion Using a Single Chip Phantom Power Circuit
AU  - Germann, Axel
AU  - Kist, Joost
T2  - AES Convention 153
M1  - Paper 13
PY  - 2022
DA  - 2022/10/06
UR  - https://aes.org/publications/elibrary-page/?id=21893
PB  - Audio Engineering Society
LA  - en
AB  - A phantom power supply increases the load on the output circuit of a condenser microphone and produces harmonic distortion. This effect can be cancelled by substituting two voltage-controlled current sources for the phantom power supply that reduce the load on the microphone output. This article presents measurements obtained with a single chip. The circuit is produced in an 80 V bipolar process. Distortion artefacts are reduced by up to 4 dB. A theoretical derivation for predicting the distortion of a phantom power circuit is given. Calculations based on the nonlinearity of transistors used in microphone output stages are compared with measurements and simulations.
ER  -