Low-Power Fifth-Order Butterworth OTA-C Low-Pass Filter with an Impedance Scaler for Portable ECG Applications
Summary :
This study proposes a multiple-output differential-input operational transconductance amplifier-C (MODI OTA-C) filter with an impedance scaler to detect cardiac activity. A ladder-type fifth-orderButterworth low-pass filter with a large time constant and low noise is implemented to reduce coefficient sensitivity and address signal distortion. Moreover, linearized MODI OTA structures with reduced transconductance and impedance scaler circuits for noise reduction are used to achieve a wide dynamic range (DR). The OTA-based circuit is operated in the subthreshold region at a supply voltage of 1 V to reduce the power consumption of the wearable device in long-term use. Experimental results of the filter with a bandwidth of 250 Hz reveal that DR is 57.6 dB, and the harmonic distortion components are below -59 dB. The power consumption of the filter, which is fabricated through a TSMC 0.18 µm CMOS process, is lower than 390 nW, and the active area is 0.135 mm2.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E101-C No.12 pp.942-952
- Publication Date
- 2018/12/01
- Publicized
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.E101.C.942
- Type of Manuscript
- PAPER
- Category
- Electronic Circuits
Authors
Shuenn-Yuh LEE
National Cheng Kung University
Cheng-Pin WANG
National Chung Cheng University
Chuan-Yu SUN
National Cheng Kung University
Po-Hao CHENG
National Cheng Kung University
Yuan-Sun CHU
National Chung Cheng University
Keyword
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Shuenn-Yuh LEE, Cheng-Pin WANG, Chuan-Yu SUN, Po-Hao CHENG, Yuan-Sun CHU, "Low-Power Fifth-Order Butterworth OTA-C Low-Pass Filter with an Impedance Scaler for Portable ECG Applications" in IEICE TRANSACTIONS on Electronics,
vol. E101-C, no. 12, pp. 942-952, December 2018, doi: 10.1587/transele.E101.C.942.
Abstract: This study proposes a multiple-output differential-input operational transconductance amplifier-C (MODI OTA-C) filter with an impedance scaler to detect cardiac activity. A ladder-type fifth-orderButterworth low-pass filter with a large time constant and low noise is implemented to reduce coefficient sensitivity and address signal distortion. Moreover, linearized MODI OTA structures with reduced transconductance and impedance scaler circuits for noise reduction are used to achieve a wide dynamic range (DR). The OTA-based circuit is operated in the subthreshold region at a supply voltage of 1 V to reduce the power consumption of the wearable device in long-term use. Experimental results of the filter with a bandwidth of 250 Hz reveal that DR is 57.6 dB, and the harmonic distortion components are below -59 dB. The power consumption of the filter, which is fabricated through a TSMC 0.18 µm CMOS process, is lower than 390 nW, and the active area is 0.135 mm2.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.E101.C.942/_p
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@ARTICLE{e101-c_12_942,
author={Shuenn-Yuh LEE, Cheng-Pin WANG, Chuan-Yu SUN, Po-Hao CHENG, Yuan-Sun CHU, },
journal={IEICE TRANSACTIONS on Electronics},
title={Low-Power Fifth-Order Butterworth OTA-C Low-Pass Filter with an Impedance Scaler for Portable ECG Applications},
year={2018},
volume={E101-C},
number={12},
pages={942-952},
abstract={This study proposes a multiple-output differential-input operational transconductance amplifier-C (MODI OTA-C) filter with an impedance scaler to detect cardiac activity. A ladder-type fifth-orderButterworth low-pass filter with a large time constant and low noise is implemented to reduce coefficient sensitivity and address signal distortion. Moreover, linearized MODI OTA structures with reduced transconductance and impedance scaler circuits for noise reduction are used to achieve a wide dynamic range (DR). The OTA-based circuit is operated in the subthreshold region at a supply voltage of 1 V to reduce the power consumption of the wearable device in long-term use. Experimental results of the filter with a bandwidth of 250 Hz reveal that DR is 57.6 dB, and the harmonic distortion components are below -59 dB. The power consumption of the filter, which is fabricated through a TSMC 0.18 µm CMOS process, is lower than 390 nW, and the active area is 0.135 mm2.},
keywords={},
doi={10.1587/transele.E101.C.942},
ISSN={1745-1353},
month={December},}
Copy
TY - JOUR
TI - Low-Power Fifth-Order Butterworth OTA-C Low-Pass Filter with an Impedance Scaler for Portable ECG Applications
T2 - IEICE TRANSACTIONS on Electronics
SP - 942
EP - 952
AU - Shuenn-Yuh LEE
AU - Cheng-Pin WANG
AU - Chuan-Yu SUN
AU - Po-Hao CHENG
AU - Yuan-Sun CHU
PY - 2018
DO - 10.1587/transele.E101.C.942
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E101-C
IS - 12
JA - IEICE TRANSACTIONS on Electronics
Y1 - December 2018
AB - This study proposes a multiple-output differential-input operational transconductance amplifier-C (MODI OTA-C) filter with an impedance scaler to detect cardiac activity. A ladder-type fifth-orderButterworth low-pass filter with a large time constant and low noise is implemented to reduce coefficient sensitivity and address signal distortion. Moreover, linearized MODI OTA structures with reduced transconductance and impedance scaler circuits for noise reduction are used to achieve a wide dynamic range (DR). The OTA-based circuit is operated in the subthreshold region at a supply voltage of 1 V to reduce the power consumption of the wearable device in long-term use. Experimental results of the filter with a bandwidth of 250 Hz reveal that DR is 57.6 dB, and the harmonic distortion components are below -59 dB. The power consumption of the filter, which is fabricated through a TSMC 0.18 µm CMOS process, is lower than 390 nW, and the active area is 0.135 mm2.
ER -
English
