Besirli, M;
Ture, K;
Dehollain, C;
Barrettino, D;
Mattavelli, M;
(2019)
A CMOS Analog Front-End for Implantable Pulmonary Artery Pressure Monitoring System.
In:
Proceedings of the 2019 15th Conference on Ph.D Research in Microelectronics and Electronics (PRIME).
(pp. pp. 261-264).
IEEE: Lausanne, Switzerland.
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Abstract
This paper presents an energy-efficient analog frontend circuit to monitor the pulmonary artery pressure (PAP) with piezoresistive pressure sensors. A low-power capacitively-coupled instrumentation amplifier (CCIA) is developed in order to boost the amplitude of the bridge sensor to the input range of the analog-to-digital converter (ADC). The 1/f noise and input-referred offset of the amplifier are eliminated by the chopping technique. Simulation results show that this CCIA with chopping technique achieves an input-referred noise density of 38.7 nV/√Hz and an input-referred offset voltage of 4 μV with a current consumption of 4.28 μA at 1.8 V voltage supply. This gives a noise-efficiency factor (NEF) of 3.1. Dual supply voltages are used to decrease the power consumption of the bridge sensor. The pressure range is selected to be between 0 and 125 mmHg and the bandwidth of the interface is set from DC to 400 Hz with an RC low pass filter (LPF). This low-noise, low-offset analog front-end circuit achieves an accuracy of 0.125 mmHg.
| Type: | Proceedings paper |
|---|---|
| Title: | A CMOS Analog Front-End for Implantable Pulmonary Artery Pressure Monitoring System |
| Event: | 2019 15th Conference on Ph.D Research in Microelectronics and Electronics (PRIME) |
| ISBN-13: | 978-1-7281-3549-6 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/PRIME.2019.8787811 |
| Publisher version: | https://doi.org/10.1109/PRIME.2019.8787811 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | heart failure (HF), pulmonary artery pressure (PAP), Wheatstone bridge sensor, capacitively-coupled instrumentation amplifier (CCIA), chopping technique |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10136119 |
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