An Energy-Efficient Small-Area Configurable Analog Front-End Interface for Diverse Biosignals Recording

被引：4

作者：

Wu, Hui ^{[1
,2
]}

Chen, Jinbo ^{[2
]}

Liu, Xing ^{[2
]}

Zou, Wenjun ^{[2
]}

Yang, Jie ^{[2
]}

Sawan, Mohamad ^{[2
]}

机构：

[1] Fudan Univ, Sch Informat Sci & Technol, Shanghai 200433, Peoples R China

[2] Westlake Univ, Ctr Excellence Biomed Res Adv Integrated On Chips, Sch Engn, Hangzhou 310030, Peoples R China

来源：

IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS | 2023年 / 17卷 / 04期

关键词：

Bio-potential signal acquisition; low-pass filter; pseudo-resistor; front-end; chopper modulation; low-noise amplifier; LOW-PASS FILTER; OTA-C FILTER; INSTRUMENTATION AMPLIFIER; NEURAL-INTERFACE; CMOS;

D O I：

10.1109/TBCAS.2023.3293492

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We introduce a fully integrated configurable analog front-end (CAFE) sensor intended to accommodate various types of bio-potential signals in this article. The proposed CAFE is composed of an AC-coupled chopper-stabilized amplifier to effectively reduce 1/f noise and an energy- and area-efficient tunable filter to tune this interface to the bandwidth of various specific signals of interest. A tunable active-pseudo-resistor is integrated into the amplifier's feedback to realize a reconfigurable high-pass cutoff frequency and enhance its linearity, while the filter is designed using a subthreshold-source-follower-based pseudo-RC (SSF-PRC) topology to attain the required super-low cutoff frequency without the need for extremely low biasing current sources. Implemented in TSMC 40 nm technology, the chip occupies an active area of 0.048 mm(2) while consuming 2.47 mu W DC power from a 1.2-V supply voltage. Measurement results indicate that the proposed design achieved a mid-band gain of 37 dB, with an integrated input-referred noise (V-IRN) of 1.7 mu V-rms within 1-260 Hz. The total harmonic distortion (THD) of the CAFE is below 1 % with a 2.4(pp) input signal. With a wide-range bandwidth adjustment capability, the proposed CAFE can be used in both wearable and implantable recording devices to acquire different bio-potential signals.

引用

页码：818 / 830

页数：13

共 23 条

[21] Design of a 1.8-μVrms IRN 180-dB CMRR configurable low-noise 6-channel analog front-end for neural recording systems on 180nm CMOS process
Le, Duc-Hung
Pham, The-Hung
IEICE ELECTRONICS EXPRESS, 2022, 20 (13):
[22] Design of a 1.8-μ Vrms IRN 180-dB CMRR configurable low-noise 6-channel analog front-end for neural recording systems on 180nm CMOS process
Duc-Hung Le
The-Hung Pham
IEICE ELECTRONICS EXPRESS, 2023, 20 (13):
[23] An Area- and Energy-Efficient 16-Channel, AC-Coupled Neural Recording Analog Frontend for High-Density Multichannel Neural Recordings
Kim, Hyeon-June
Park, Younghoon
Eom, Kyungsik
Park, Sung-Yun
ELECTRONICS, 2021, 10 (16)

← 1 2 3 →