TY - GEN
T1 - A Multi-Channel 1.52 μvrms Front End with Orthogonal Frequency Chopping for Neural Recording Applications
AU - Dong, Li
AU - Lan, Zhechong
AU - Gui, Xiaoyan
AU - He, Chengyang
AU - Xin, Youze
AU - Li, Ken
AU - Geng, Li
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - This paper presents a multi-channel neural recording front end (FE) with orthogonal frequency chopping for neural recording applications by using a standard 0.18 μm CMOS process. Considering the dc electrode offset (DEO) and the limited input impedance, dc-servo loop with duty cycle resistor and positive feedback loop with T-bridge capacitors are employed, which achieves high pass corner frequency of 0.1 Hz and input impedance of 850 MΩ, respectively. The proposed SAR-ADC with dynamic element matching (DEM) algorithm enhances the FE linearity. The total input referred noise (IRN) is 1.52 Vrms with 4 times oversampling, which is the lowest compared to prior-art of works, while exhibiting comparable power consumption.
AB - This paper presents a multi-channel neural recording front end (FE) with orthogonal frequency chopping for neural recording applications by using a standard 0.18 μm CMOS process. Considering the dc electrode offset (DEO) and the limited input impedance, dc-servo loop with duty cycle resistor and positive feedback loop with T-bridge capacitors are employed, which achieves high pass corner frequency of 0.1 Hz and input impedance of 850 MΩ, respectively. The proposed SAR-ADC with dynamic element matching (DEM) algorithm enhances the FE linearity. The total input referred noise (IRN) is 1.52 Vrms with 4 times oversampling, which is the lowest compared to prior-art of works, while exhibiting comparable power consumption.
KW - Orthogonal frequency chopping
KW - SAR-ADC
KW - capacitive-coupled instrumentation amplifier
KW - dynamic element matching
KW - neural recording
KW - noise
UR - https://www.scopus.com/pages/publications/85078694472
U2 - 10.1109/APCCAS47518.2019.8953173
DO - 10.1109/APCCAS47518.2019.8953173
M3 - 会议稿件
AN - SCOPUS:85078694472
T3 - Proceedings - APCCAS 2019: 2019 IEEE Asia Pacific Conference on Circuits and Systems: Innovative CAS Towards Sustainable Energy and Technology Disruption
SP - 389
EP - 392
BT - Proceedings - APCCAS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 15th Annual IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2019
Y2 - 11 November 2019 through 14 November 2019
ER -
