A 24.8-μW Biopotential Amplifier Tolerant to 15-V<sub>PP</sub> Common-Mode Interference for Two-Electrode ECG Recording in 180-nm CMOS

Koo, Nahmil; Cho, Seonghwan

doi:10.1109/jssc.2020.3005768

Cited by 28 publications

(7 citation statements)

References 15 publications

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“…In that case, fluctuations in

and

cause variations in the common-mode voltage, resulting in common mode to differential conversions that appear as a low-frequency noise in the signal measurements [ 95 ]. Further, if

and

are significant, it can saturate the output of the front-end amplifiers of the measurement circuit, distorting or clipping the biopotential signals [ 96 ].…”

Section: Biopotential Sensingmentioning

confidence: 99%

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

et al. 2021

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Several on-body sensing and communication applications use electrodes in contact with the human body. Body–electrode interfaces in these cases act as a transducer, converting ionic current in the body to electronic current in the sensing and communication circuits and vice versa. An ideal body–electrode interface should have the characteristics of an electrical short, i.e., the transfer of ionic currents and electronic currents across the interface should happen without any hindrance. However, practical body–electrode interfaces often have definite impedances and potentials that hinder the free flow of currents, affecting the application’s performance. Minimizing the impact of body–electrode interfaces on the application’s performance requires one to understand the physics of such interfaces, how it distorts the signals passing through it, and how the interface-induced signal degradations affect the applications. Our work deals with reviewing these elements in the context of biopotential sensing and human body communication.

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“…In that case, fluctuations in

and

cause variations in the common-mode voltage, resulting in common mode to differential conversions that appear as a low-frequency noise in the signal measurements [ 95 ]. Further, if

and

are significant, it can saturate the output of the front-end amplifiers of the measurement circuit, distorting or clipping the biopotential signals [ 96 ].…”

Section: Biopotential Sensingmentioning

confidence: 99%

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

et al. 2021

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“…Hence, medical devices, especially implanted devices, are substantially required to provide a ‘contact-less’ situation and to improve the link between performance and reliability [ 15 ]. By developing technology, implanted devices can serve the lives of many patients and can be used for clinical treatments [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Amplifiers in Biomedical Engineering: A Review from Application Perspectives

Kouhalvandi

Matekovits

Peter

2023

Sensors

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Continuous monitoring and treatment of various diseases with biomedical technologies and wearable electronics has become significantly important. The healthcare area is an important, evolving field that, among other things, requires electronic and micro-electromechanical technologies. Designed circuits and smart devices can lead to reduced hospitalization time and hospitals equipped with high-quality equipment. Some of these devices can also be implanted inside the body. Recently, various implanted electronic devices for monitoring and diagnosing diseases have been presented. These instruments require communication links through wireless technologies. In the transmitters of these devices, power amplifiers are the most important components and their performance plays important roles. This paper is devoted to collecting and providing a comprehensive review on the various designed implanted amplifiers for advanced biomedical applications. The reported amplifiers vary with respect to the class/type of amplifier, implemented CMOS technology, frequency band, output power, and the overall efficiency of the designs. The purpose of the authors is to provide a general view of the available solutions, and any researcher can obtain suitable circuit designs that can be selected for their problem by reading this survey.

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“…In the recent past, Koo et al [24] reported a biopotential amplifier based on common mode charge pump technique which shows gain of 40 dB, input referred noise (IRN) of 1.67 µVrms with bandwidth of 10 kHz and consumes power of 24.8 µW from 1.2 V supply voltage. Kim et al [25] demonstrated a biopotential amplifier with pole-cancellation technique which exhibits gain of 34 dB with an IRN of 4.03 µVrms, bandwidth of 25 mHz-25 kHz, noise efficiency factor (NEF) of 3.18 and power consumption of 3.78 µW from 1.8 V supply voltage.…”

Section: Introductionmentioning

confidence: 99%

Ultra-low power signal conditioning system for effective biopotential signal recording

Thakur

Sharma

Kapila

et al. 2021

J. Micromech. Microeng.

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Design of Low-power signal conditioning system comprising of biopotential amplifier (BPA) and low pass Filter (LPF) remains one of the most critical block of system on chips (SoCs) targeted for wearable non-invasive and semi-invasive biomedical applications like electroencephalography and electrocorticography. Design of the same is a challenging task owing to noise-power trade-off in BPA and dependency of process voltage and temperature variations on the filter circuit. We report the design of a signal conditioning system comprising of a capacitively coupled capacitive feedback (CC-CF) BPA and composite p-channel metal oxide semiconductor (PMOS) based complementary source-follower LPF. The results obtained in Cadence with standard 0.18 µm technology and BSIM3V3 MOS models for the proposed signal conditioning system provide a DC-gain value of 36.76 dB, bandwidth of 280 mHz–174 Hz, power consumption of 24.54 µW, supply current of 24.54 µA, area consumption of 0.212826 mm2 from ± 0.5 V supply voltage. Robustness of this signal conditioning system has been checked by performing 200 runs of monte carlo simulations. The statistical results obtained for gain of (CC-CF) BPA, complementary source follower (CSF-C) LPF and signal conditioning system show mean (µ) values of 39.93 dB, −3.92 dB and 35.96 dB as well as standard deviation ( σ ) of 135.433 mdB, 1.90 dB, and 2.00 dB respectively. The CC-CF BPA architecture, CSF-C LPF and complete signal conditioning system are expected to be used in SoCs targeted for various low-power biomedical applications.

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A 24.8-μW Biopotential Amplifier Tolerant to 15-V_PP Common-Mode Interference for Two-Electrode ECG Recording in 180-nm CMOS

Cited by 28 publications

References 15 publications

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

Amplifiers in Biomedical Engineering: A Review from Application Perspectives

Ultra-low power signal conditioning system for effective biopotential signal recording

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A 24.8-μW Biopotential Amplifier Tolerant to 15-VPP Common-Mode Interference for Two-Electrode ECG Recording in 180-nm CMOS

Cited by 28 publications

References 15 publications

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

Human Body–Electrode Interfaces for Wide-Frequency Sensing and Communication: A Review

Amplifiers in Biomedical Engineering: A Review from Application Perspectives

Ultra-low power signal conditioning system for effective biopotential signal recording

Contact Info

Product

Resources

About

A 24.8-μW Biopotential Amplifier Tolerant to 15-V_PP Common-Mode Interference for Two-Electrode ECG Recording in 180-nm CMOS