Energy efficient biopotential acquisition unit for wearable health monitoring applications

Singh, Wazir; Gupta, Yatharth; Jivani, Paritosh; Deb, Sujay

doi:10.1109/isqed.2017.7918338

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…With the advancement in VLSI technologies, the size of CMOS, value of power supply, and power consumption are the critical parameters [1]. With the development in amplifier technology, designers have placed more emphasis on high gain, improved phase margin, and less occupied area [2][3][4][5][6]. The growing need for an unambiguous biopotential acquisition system being periodically checked on the sensing signals has turned analog mixed CMOS circuit design for high performance into a principal field [7].…”

Section: Introductionmentioning

confidence: 99%

Analyzing A High Gain, Low Power OTA for Biomedical applications in 180 nm CMOS Technology

Kumar

Scholar

2022

Preprint

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As biopotential signals are having very small frequency variations tens of Hz and micro to millivolts amplitude in the range. While acquiring biopotential signals from a human body, intrusions occur in the acquisition system. Thus for acquiring noise-free signals, the enhanced Biopotential Acquisition unit having a high gain with an improved common-mode rejection ratio readout front-end is designed. To solve mentioned issues, a Fully Differential Two-Stage OTA is introduced in this paper to achieve high DC gain and high Unity-gain frequency. Operational Transconductance Amplifier operates at ± 0.2 V supply voltage, the bias current of 20µA, and achieves a high gain of 74dB. The design comprises a frequency compensation structure by connecting a capacitor across a high voltage stage and the load capacitor is connected across output by following the relation of CC > 0.22 CL. The proposed high gain stage achieves additional gain with reduced noise of 0.2 mV/\(\sqrt{\text{H}\text{z}}\) with a minimal power consumption of 1.9 nW. The analog readout front-end is executed using 180 nm CMOS Technology and utilizes less power, making it ideal for battery-powered devices in Biopotential Acquisition systems.

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Section: Introductionmentioning

confidence: 99%

Analyzing A High Gain, Low Power OTA for Biomedical applications in 180 nm CMOS Technology

Kumar

Scholar

2022

Preprint

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“…Owing to a large number of resistors being used, a power associated with the design will increase. To overcome this issue, the design must have less number of resistors and MOS devices, and a high common signal rejection [4, 5]. To meet this requirement current mode, the OpAmp is used.…”

Section: Introductionmentioning

confidence: 99%