Paper Info
Title
A 10 <tex>$\mu \mathrm{W}-74.6\mathrm{dB}$</tex> THD Arterial Pulse Waveform Sensing System with Automatic Bridge-Offset Calibration and Super Class-AB Output Stage
Abstract
This paper presents a power-efficient, highly-linear sensing system for arterial pulse waveform (APW) acquisition. The system consists of a front-end circuit connected to a packaged silicone-coated resistive-bridge pressure sensor for detecting APW through direct skin contact in a non-invasive manner. Compared to other pulse sensing approaches, the proposed front-end only requires an instrumentation amplifier (IA) and a low-pass filtering analog-to-digital converter (LPF-ADC), and consumes a total power of 10 μW. An automatic calibration circuit is proposed to compensate for the resistive-bridge offset and can reduce such offset down to 1 mV. High linearity in the IA is provided through the use of a super class-AB output stage. A LPF-ADC architecture is employed to extract and digitize the APW in a 100 Hz bandwidth, saving 90 % of the passives area. The front-end provides a measured input-referred noise of 7.2 μVrms with a gain of 32-40 dB, and a THD of -74.6 dB. Together with an on-chip low dropout regulator (LDO) and a buffer stage, the prototype fabricated in 0.18 μm CMOS technology has an active area of 0.52 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> .
Year
DOI
Venue
2019
10.1109/A-SSCC47793.2019.9056943
2019 IEEE Asian Solid-State Circuits Conference (A-SSCC)
Keywords
DocType
ISBN
THD arterial pulse waveform sensing system,automatic bridge-offset calibration,super class-AB output stage,highly-linear sensing system,arterial pulse waveform acquisition,APW,front-end circuit,packaged silicone-coated resistive-bridge pressure sensor,direct skin contact,analog-to-digital converter,automatic calibration circuit,LPF-ADC architecture,buffer stage,power 10.0 muW,voltage 1.0 mV,size 0.18 mum,bandwidth 100.0 Hz,gain 32.0 dB to 40.0 dB
Conference
978-1-7281-5107-6
Citations 
PageRank 
References 
0
0.34
4
Authors
3
Name
Order
Citations
PageRank
Yu-Pin Hsu100.34
Zemin Liu26412.71
Mona Mostafa Hella36814.51