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Adaptive power regulation and data delivery for multi-module implants

Mifsud, A; Haci, D; Ghoreishizadeh, SS; Liu, Y; Constandinou, TG; (2018) Adaptive power regulation and data delivery for multi-module implants. In: Proceedings of the IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017. IEEE: Turin, Italy. Green open access

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Abstract

Emerging applications for implantable devices are requiring multi-unit systems with intrabody transmission of power and data through wireline interfaces. This paper proposes a novel method for power delivery within such a configuration that makes use of closed loop dynamic regulation. This is implemented for an implantable application requiring a single master and multiple identical slave devices utilising a parallel-connected 4-wire interface. The power regulation is achieved within the master unit through closed loop monitoring of the current consumption to the wired link. Simultaneous power transfer and full-duplex data communication is achieved by superimposing the power carrier and downlink data over two wires and uplink data over a second pair of wires. Measured results using a fully isolated (AC coupled) 4-wire lead, demonstrate this implementation can transmit up to 120 mW of power at 6 V (at the slave device, after eliminating any losses). The master device has a maximum efficiency of 80 % including a dominant dynamic power loss. A 6 V constant supply at the slave device is recovered 1.5 ms after a step of 22 mA.

Type: Proceedings paper
Title: Adaptive power regulation and data delivery for multi-module implants
Event: 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017
ISBN-13: 9781509058037
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/BIOCAS.2017.8325208
Publisher version: https://doi.org/10.1109/BIOCAS.2017.8325208
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: Implants, Uplink, Downlink, Wires, Communication cables, Sensors, Voltage measurement
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Ortho and MSK Science
URI: http://discovery.ucl.ac.uk/id/eprint/10063267
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