About A Digital RF-Condenser Microphone

Mueller R, Holstein P. About A Digital RF-Condenser Microphone. In: AES Convention 116. Audio Engineering Society; 2004. Paper 6130. Available from: https://aes.org/publications/elibrary-page/?id=12648

@inproceedings{Mueller2004_12648,
  author = {Mueller, Roland and Holstein, Peter},
  title = {{About A Digital RF-Condenser Microphone}},
  booktitle = {AES Convention 116},
  note = {Paper 6130},
  year = {2004},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12648}
}

TY  - CPAPER
TI  - About A Digital RF-Condenser Microphone
AU  - Mueller, Roland
AU  - Holstein, Peter
T2  - AES Convention 116
M1  - Paper 6130
PY  - 2004
DA  - 2004/05/06
UR  - https://aes.org/publications/elibrary-page/?id=12648
PB  - Audio Engineering Society
LA  - en
AB  - Digital microphones are commonly based on an LF-condenser wit an ADC in the same ousing. However,this concept as some disadvantages,suc as t e inherent problems of LF-condenser microp ones with respect to t e influence of umidity on sensitivity,distortion and low cut-off frequency. Therefore,anot er approac for digital microphones is proposed,w ereby the capacity of t e microp one capsule controls t e frequency of an LC-type generator.The resulting non-linear distortion is of second order and similiar to those of classical microphones wit vacuum tube preamplifier.A negative capacitance can be added to reduce the distortion.There are several ways to implement demodulation and digitalization;simulations show that a sufficient dynamic range can be achieved by using a special kind of sigma-delta FM discriminator.
ER  -