IEICE TRANSACTIONS on Electronics
An Energy-Efficient ΔΣ Modulator Using Dynamic-Common-Source Integrators
Summary :
An energy-efficient ΔΣ modulator using a novel switched-capacitor-based integrator has been investigated. The proposed dynamic integrator uses a common-source configuration, where a MOSFET turns off after the charge redistribution is completed. Thus, only the subthreshold current flows through the integrator, resulting in high energy efficiency. A constant threshold voltage works as the virtual ground in conventional opamp-based integrators. The performance has been estimated for a 2nd-order ΔΣ modulator by transistor-level circuit simulation assuming a 0.18-µm standard CMOS technology. An FOM of 29fJ/conv-step was obtained with a peak SNDR of 82.6dB for a bandwidth and a sampling frequency of 20kHz and 5MHz, respectively.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E97-C No.5 pp.438-443
- Publication Date
- 2014/05/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E97.C.438
- Type of Manuscript
- Special Section PAPER (Special Section on Fundamentals and Applications of Advanced Semiconductor Devices)
- Category
Authors
Ryo MATSUSHIBA
Sophia University
Hiroaki KOTANI
Sophia University
Takao WAHO
Sophia University
Keyword
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Ryo MATSUSHIBA, Hiroaki KOTANI, Takao WAHO, "An Energy-Efficient ΔΣ Modulator Using Dynamic-Common-Source Integrators" in IEICE TRANSACTIONS on Electronics,
vol. E97-C, no. 5, pp. 438-443, May 2014, doi: 10.1587/transele.E97.C.438.
Abstract: An energy-efficient ΔΣ modulator using a novel switched-capacitor-based integrator has been investigated. The proposed dynamic integrator uses a common-source configuration, where a MOSFET turns off after the charge redistribution is completed. Thus, only the subthreshold current flows through the integrator, resulting in high energy efficiency. A constant threshold voltage works as the virtual ground in conventional opamp-based integrators. The performance has been estimated for a 2nd-order ΔΣ modulator by transistor-level circuit simulation assuming a 0.18-µm standard CMOS technology. An FOM of 29fJ/conv-step was obtained with a peak SNDR of 82.6dB for a bandwidth and a sampling frequency of 20kHz and 5MHz, respectively.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E97.C.438/_p
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@ARTICLE{e97-c_5_438,
author={Ryo MATSUSHIBA, Hiroaki KOTANI, Takao WAHO, },
journal={IEICE TRANSACTIONS on Electronics},
title={An Energy-Efficient ΔΣ Modulator Using Dynamic-Common-Source Integrators},
year={2014},
volume={E97-C},
number={5},
pages={438-443},
abstract={An energy-efficient ΔΣ modulator using a novel switched-capacitor-based integrator has been investigated. The proposed dynamic integrator uses a common-source configuration, where a MOSFET turns off after the charge redistribution is completed. Thus, only the subthreshold current flows through the integrator, resulting in high energy efficiency. A constant threshold voltage works as the virtual ground in conventional opamp-based integrators. The performance has been estimated for a 2nd-order ΔΣ modulator by transistor-level circuit simulation assuming a 0.18-µm standard CMOS technology. An FOM of 29fJ/conv-step was obtained with a peak SNDR of 82.6dB for a bandwidth and a sampling frequency of 20kHz and 5MHz, respectively.},
keywords={},
doi={10.1587/transele.E97.C.438},
ISSN={1745-1353},
month={May},}
Copy
TY - JOUR
TI - An Energy-Efficient ΔΣ Modulator Using Dynamic-Common-Source Integrators
T2 - IEICE TRANSACTIONS on Electronics
SP - 438
EP - 443
AU - Ryo MATSUSHIBA
AU - Hiroaki KOTANI
AU - Takao WAHO
PY - 2014
DO - 10.1587/transele.E97.C.438
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E97-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 2014
AB - An energy-efficient ΔΣ modulator using a novel switched-capacitor-based integrator has been investigated. The proposed dynamic integrator uses a common-source configuration, where a MOSFET turns off after the charge redistribution is completed. Thus, only the subthreshold current flows through the integrator, resulting in high energy efficiency. A constant threshold voltage works as the virtual ground in conventional opamp-based integrators. The performance has been estimated for a 2nd-order ΔΣ modulator by transistor-level circuit simulation assuming a 0.18-µm standard CMOS technology. An FOM of 29fJ/conv-step was obtained with a peak SNDR of 82.6dB for a bandwidth and a sampling frequency of 20kHz and 5MHz, respectively.
ER -
English
