Besirli, M;
Ture, K;
Barrettino, D;
Beghetti, M;
Mattavelli, M;
Dehollain, C;
Maloberti, F;
(2021)
A 0.4 nJ Excitation Energy Bridge-to-Digital Converter for Implantable Pulmonary Artery Pressure Monitoring.
In:
Proceedings of the 2021 IEEE Biomedical Circuits and Systems Conference (BioCAS).
IEEE: Virtual conference.
(In press).
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Abstract
This paper presents an energy-efficient, duty-cycled, and spinning excitation bridge-to-digital converter (BDC) suitable for measuring the pulmonary artery pressure of heart failure patients with an implantable system. The duty-cycled bridge uses resistances of 6.2 kΩ and, with a supply of 1.2 V, consumes 0.4 nJ excitation energy. A novel spinning method is applied to the bridge and the capacitive DAC simultaneously in such a way to achieve an offset-independent digital output and to eliminate the need for complex instrumentation amplifiers with offset-reduction techniques or calibration. The SAR ADC fabricated in 0.18-μm CMOS consumes 19 nW at 1.2 V. With a sampling rate of 1 kS/s, the converter achieves the ENOB of 9.2 bits.
| Type: | Proceedings paper |
|---|---|
| Title: | A 0.4 nJ Excitation Energy Bridge-to-Digital Converter for Implantable Pulmonary Artery Pressure Monitoring |
| Event: | 2021 IEEE Biomedical Circuits and Systems Conference (BioCAS) |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://2021.ieee-biocas.org/ |
| 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: | medical implantable devices, pressure sensors, SAR ADC, bridge-to-digital converter, duty-cycled, offset compensation |
| 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/10136087 |
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