Self-Calibrating Circuit for Implantable Current Stimulators

Natalia Martínez, Matías Miguez, Juan Sapriza, Joel Gak, Alfredo Arnaud

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Resumen

In this work, a self-calibrating circuit aimed at balancing biphasic current stimulators for Implantable Medical Devices (IMDs) is presented. Mismatched biphasic pulses cause a charge-unbalanced stimulation leading to tissue damage over time. The proposed module is an integrating, precision current comparator capable of detecting a 0.6% typical charge mismatch between the stimulating phases. The circuit's output can be used by a trimmable current stimulator to protect the tissue by reducing the injected net charge error. The total current consumption of the circuit is 1.5 μAduring a 430 μS operating cycle. It was designed and fabricated in a 0.18 μm CMOS-HV technology, occupying a total area of 0.30 mm2. The circuit can also be adapted to measure Electrode-Tissue Interface (ETI) impedance.

Idioma originalInglés
Título de la publicación alojadaLASCAS 2023 - 14th IEEE Latin American Symposium on Circuits and Systems, Proceedings
EditoresMonica Karel Huerta
EditorialInstitute of Electrical and Electronics Engineers Inc.
ISBN (versión digital)9781665457057
DOI
EstadoPublicada - 2023
Evento14th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2023 - Quito
Duración: 27 feb. 20233 mar. 2023

Serie de la publicación

NombreLASCAS 2023 - 14th IEEE Latin American Symposium on Circuits and Systems, Proceedings

Conferencia

Conferencia14th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2023
País/TerritorioEcuador
CiudadQuito
Período27/02/233/03/23

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