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L. Urbansky, and U. Zölzer, "A Novel Digital Radio-Frequency Capacitor Microphone with Gain Ranging," Paper 10214, (2019 March.). doi: L. Urbansky, and U. Zölzer, "A Novel Digital Radio-Frequency Capacitor Microphone with Gain Ranging," Paper 10214, (2019 March.). doi:
Abstract: Most capacitor microphones use an audio-frequency (AF) implementation. In an AF circuit, a capacitor is charged with a constant bias voltage leading to a high-impedance circuit. In contrast, by using a radio-frequency (RF) approach, the capacitor is operated on a higher frequency band which reduces the circuit’s impedance. However, state of the art RF microphones are entirely analog. Thus, a novel digital RF condenser microphone system is proposed. Furthermore, it is extended by a corresponding gain ranging approach. The expected advantages are a further improved demodulation linearity due to a digital demodulation and a circumvention of analog disadvantages due to the smaller required analog circuit. Additionally, because of the analog bandpass signal, it is expected to utterly bypass the electrical low frequency 1/f noise.

@article{urbansky2019a,
author={urbansky, lars and zölzer, udo},
journal={journal of the audio engineering society},
title={a novel digital radio-frequency capacitor microphone with gain ranging},
year={2019},
volume={},
number={},
pages={},
doi={},
month={march},} @article{urbansky2019a,
author={urbansky, lars and zölzer, udo},
journal={journal of the audio engineering society},
title={a novel digital radio-frequency capacitor microphone with gain ranging},
year={2019},
volume={},
number={},
pages={},
doi={},
month={march},
abstract={most capacitor microphones use an audio-frequency (af) implementation. in an af circuit, a capacitor is charged with a constant bias voltage leading to a high-impedance circuit. in contrast, by using a radio-frequency (rf) approach, the capacitor is operated on a higher frequency band which reduces the circuit’s impedance. however, state of the art rf microphones are entirely analog. thus, a novel digital rf condenser microphone system is proposed. furthermore, it is extended by a corresponding gain ranging approach. the expected advantages are a further improved demodulation linearity due to a digital demodulation and a circumvention of analog disadvantages due to the smaller required analog circuit. additionally, because of the analog bandpass signal, it is expected to utterly bypass the electrical low frequency 1/f noise.},}

TY - paper
TI - A Novel Digital Radio-Frequency Capacitor Microphone with Gain Ranging
SP - EP -
AU - Urbansky, Lars
AU - Zölzer, Udo
PY - 2019
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - March 2019 TY - paper
TI - A Novel Digital Radio-Frequency Capacitor Microphone with Gain Ranging
SP - EP -
AU - Urbansky, Lars
AU - Zölzer, Udo
PY - 2019
JO - Journal of the Audio Engineering Society
IS -
VO -
VL -
Y1 - March 2019
AB - Most capacitor microphones use an audio-frequency (AF) implementation. In an AF circuit, a capacitor is charged with a constant bias voltage leading to a high-impedance circuit. In contrast, by using a radio-frequency (RF) approach, the capacitor is operated on a higher frequency band which reduces the circuit’s impedance. However, state of the art RF microphones are entirely analog. Thus, a novel digital RF condenser microphone system is proposed. Furthermore, it is extended by a corresponding gain ranging approach. The expected advantages are a further improved demodulation linearity due to a digital demodulation and a circumvention of analog disadvantages due to the smaller required analog circuit. Additionally, because of the analog bandpass signal, it is expected to utterly bypass the electrical low frequency 1/f noise.