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A power efficient time-to-current stimulator for vagal-cardiac connection after heart transplantation

Wu, Y; Jiang, D; Neshatvar, N; Demosthenous, A; (2021) A power efficient time-to-current stimulator for vagal-cardiac connection after heart transplantation. In: 2021 IEEE International Symposium on Circuits and Systems (ISCAS). IEEE: Daegu, Korea. Green open access

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Abstract

This paper presents a stimulator for a cardiac neuroprosthesis aiming to restore the parasympathetic control after heart transplantation. The stimulator is based on time-to-current conversion, instead of the conventional current mode digital-to-analog converter (DAC) that drives the output current mirrors. It uses a DAC based on capacitor charging to drive a power efficient voltage-to-current converter for output. The stimulator uses 1.8 V for system operation and 10 V for stimulation. The total power consumption is Istim × 10 V +18. u μW during the biphasic current output, with a maximum Istim of 512 μA. The stimulator was designed in CMOS 0.18 μm technology and post-layout simulations are presented.

Type: Proceedings paper
Title: A power efficient time-to-current stimulator for vagal-cardiac connection after heart transplantation
Event: 2021 IEEE International Symposium on Circuits and Systems (ISCAS)
ISBN-13: 9781728192017
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ISCAS51556.2021.9401680
Publisher version: https://doi.org/10.1109/ISCAS51556.2021.9401680
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 transplant, implantable devices, neural stimulator, time-to-current, vagus nerve stimulation
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/10131816
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