Presentation
A High TCMRR, Inherently Charge Balanced Bidirectional Front-End for Multichannel Closed-Loop Neuromodulation
Author/s | Valtierra, José Luis
Fiorelli, Rafaella Pérez Prieto, Norberto Delgado Restituto, Manuel Rodríguez Vázquez, Ángel Benito |
Department | Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Publication Date | 2019 |
Deposit Date | 2019-12-19 |
Published in |
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ISBN/ISSN | 978-1-5090-0617-5 2163-4025 |
Abstract | This paper describes a multichannel bidirectional front-end for implantable closed-loop neuromodulation. Stimulation artefacts are reduced by way of a 4-channel H-bridge current source sharing stimulator front-end that ... This paper describes a multichannel bidirectional front-end for implantable closed-loop neuromodulation. Stimulation artefacts are reduced by way of a 4-channel H-bridge current source sharing stimulator front-end that minimizes residual charge drops in the electrodes via topology-inherent charge balancing. A 4-channel chopper front-end is capable of multichannel recording in the presence of artefacts as a result of its high total common-mode rejection ratio (TCMRR) that accounts for CMRR degradation due to electrode mismatch. Experimental verification of a prototype fabricated in a standard 180 nm process shows a stimulator front-end with 0.059% charge balance and 0.275 nA DC current error. The recording front-end consumes 3.24 µW, tolerates common-mode interference up to 1 Vpp and shows a TCMRR > 66 dB for 500 mVpp inputs. |
Project ID. | TEC2016-80923-P
N000141110312 |
Citation | Valtierra, J.L., Fiorelli, R., Pérez Prieto, N., Delgado Restituto, M. y Rodríguez Vázquez, Á.B. (2019). A High TCMRR, Inherently Charge Balanced Bidirectional Front-End for Multichannel Closed-Loop Neuromodulation. En IEEE Biomedical Circuits and Systems Conference (BioCAS) Nara, Japón: Institute of Electrical and Electronics Engineers. |
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A High TCMRR Inherently Charge.pdf | 3.324Mb | [PDF] | View/ | |