Print Email Facebook Twitter Spread-Spectrum Modulated Multi-Channel Biosignal Acquisition Using a Shared Analog CMOS Front-End Title Spread-Spectrum Modulated Multi-Channel Biosignal Acquisition Using a Shared Analog CMOS Front-End Author Rout, Samprajani (Student TU Delft) Monna, G.L.E. (TU Delft Bio-Electronics; Phosphoenix) Pareschi, Fabio (Politecnico di Torino) Setti, Gianluca (King Abdullah University of Science and Technology) Serdijn, W.A. (TU Delft Bio-Electronics) Date 2023 Abstract The key challenges in designing a multi-channel biosignal acquisition system for an ambulatory or invasive medical application with a high channel count are reducing the power consumption, area consumption and the outgoing wire count. This article proposes a spread-spectrum modulated biosignal acquisition system using a shared amplifier and an analog-to-digital converter (ADC). We propose a design method to optimize a recording system for a given application based on the required SNR performance, number of inputs, and area. The proposed method is tested and validated on real pre-recorded atrial electrograms and achieves an average percentage root-mean-square difference (PRD) performance of 2.65% and 3.02% for sinus rhythm (SR) and atrial fibrillation (AF), respectively by using pseudo-random binary-sequence (PRBS) codes with a code-length of 511, for 16 inputs. We implement a 4-input spread-spectrum analog front-end in a 0.18 μ m CMOS process to demonstrate the proposed approach. The analog front-end consists of a shared amplifier, a 2nd order Σ Δ ADC sampled at 7.8 MHz, used for digitization, and an on-chip 7-bit PRBS generator. It achieves a number-of-inputs to outgoing-wire ratio of 4:1 while consuming 23 μ A/input including biasing from a 1.8 V power supply and 0.067 mm 2 in area. Subject atrial electrogramsbiosignal acquisitionCodesECGFrequency division multiplexingFrequency modulationGold codesIronlinear- feedback shift registerModulationmulti-channel signal acquisitionRecordingsigma-delta converterspread-spectrum modulationWires To reference this document use: http://resolver.tudelft.nl/uuid:8a7d7c7e-038d-455c-aec7-62e6a9571a38 DOI https://doi.org/10.1109/TBCAS.2023.3317188 Embargo date 2024-04-01 ISSN 1932-4545 Source IEEE Transactions on Biomedical Circuits and Systems, 17 (4), 872-884 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Samprajani Rout, G.L.E. Monna, Fabio Pareschi, Gianluca Setti, W.A. Serdijn Files PDF Spread_Spectrum_Modulated ... nt_End.pdf 4.37 MB Close viewer /islandora/object/uuid:8a7d7c7e-038d-455c-aec7-62e6a9571a38/datastream/OBJ/view