The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Un préamplificateur CMOS sur puce pour la lecture directe du signal provenant d'un microphone à condensateur électret a été conçu avec une immunité élevée au bruit de mode commun et d'alimentation. Le préamplificateur haute impédance basé sur Gm-Opamp-RC aide à éliminer tous les inconvénients de l'amplificateur conventionnel basé sur JFET et peut piloter un modulateur sigma-delta à condensateur commuté suivant afin de réaliser un microphone à électret numérique compact. La puce proposée est conçue sur la base de la technologie CMOS 0.18 µm, et les résultats de simulation montrent 86 dB de plage dynamique avec 4.5 µVrms de bruit référencé en entrée pour une bande passante audio de 20 kHz et une distorsion harmonique totale (THD) de 1 % à 90 Entrée mVrms. Le taux de réjection de l'alimentation (PSRR) et le taux de réjection en mode commun (CMRR) sont supérieurs à 95 dB à 1 kHz. La conception proposée dissipe 125 µA et peut fonctionner sur une large plage de tensions d'alimentation de 1.6 V à 3.3 V.
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Huy-Binh LE, Seung-Tak RYU, Sang-Gug LEE, "A Fully On-Chip Gm-Opamp-RC Based Preamplifier for Electret Condenser Microphones" in IEICE TRANSACTIONS on Electronics,
vol. E92-C, no. 4, pp. 587-588, April 2009, doi: 10.1587/transele.E92.C.587.
Abstract: An on-chip CMOS preamplifier for direct signal readout from an electret capacitor microphone has been designed with high immunity to common-mode and supply noise. The Gm-Opamp-RC based high impedance preamplifier helps to remove all disadvantages of the conventional JFET based amplifier and can drive a following switched-capacitor sigma-delta modulator in order to realize a compact digital electret microphone. The proposed chip is designed based on 0.18 µm CMOS technology, and the simulation results show 86 dB of dynamic range with 4.5 µVrms of input-referred noise for an audio bandwidth of 20 kHz and a total harmonic distortion (THD) of 1% at 90 mVrms input. Power supply rejection ratio (PSRR) and common-mode rejection ration (CMRR) are more than 95 dB at 1 kHz. The proposed design dissipates 125 µA and can operate over a wide supply voltage range of 1.6 V to 3.3 V.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E92.C.587/_p
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@ARTICLE{e92-c_4_587,
author={Huy-Binh LE, Seung-Tak RYU, Sang-Gug LEE, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Fully On-Chip Gm-Opamp-RC Based Preamplifier for Electret Condenser Microphones},
year={2009},
volume={E92-C},
number={4},
pages={587-588},
abstract={An on-chip CMOS preamplifier for direct signal readout from an electret capacitor microphone has been designed with high immunity to common-mode and supply noise. The Gm-Opamp-RC based high impedance preamplifier helps to remove all disadvantages of the conventional JFET based amplifier and can drive a following switched-capacitor sigma-delta modulator in order to realize a compact digital electret microphone. The proposed chip is designed based on 0.18 µm CMOS technology, and the simulation results show 86 dB of dynamic range with 4.5 µVrms of input-referred noise for an audio bandwidth of 20 kHz and a total harmonic distortion (THD) of 1% at 90 mVrms input. Power supply rejection ratio (PSRR) and common-mode rejection ration (CMRR) are more than 95 dB at 1 kHz. The proposed design dissipates 125 µA and can operate over a wide supply voltage range of 1.6 V to 3.3 V.},
keywords={},
doi={10.1587/transele.E92.C.587},
ISSN={1745-1353},
month={April},}
Copier
TY - JOUR
TI - A Fully On-Chip Gm-Opamp-RC Based Preamplifier for Electret Condenser Microphones
T2 - IEICE TRANSACTIONS on Electronics
SP - 587
EP - 588
AU - Huy-Binh LE
AU - Seung-Tak RYU
AU - Sang-Gug LEE
PY - 2009
DO - 10.1587/transele.E92.C.587
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E92-C
IS - 4
JA - IEICE TRANSACTIONS on Electronics
Y1 - April 2009
AB - An on-chip CMOS preamplifier for direct signal readout from an electret capacitor microphone has been designed with high immunity to common-mode and supply noise. The Gm-Opamp-RC based high impedance preamplifier helps to remove all disadvantages of the conventional JFET based amplifier and can drive a following switched-capacitor sigma-delta modulator in order to realize a compact digital electret microphone. The proposed chip is designed based on 0.18 µm CMOS technology, and the simulation results show 86 dB of dynamic range with 4.5 µVrms of input-referred noise for an audio bandwidth of 20 kHz and a total harmonic distortion (THD) of 1% at 90 mVrms input. Power supply rejection ratio (PSRR) and common-mode rejection ration (CMRR) are more than 95 dB at 1 kHz. The proposed design dissipates 125 µA and can operate over a wide supply voltage range of 1.6 V to 3.3 V.
ER -