eprintid: 10063267 rev_number: 27 eprint_status: archive userid: 608 dir: disk0/10/06/32/67 datestamp: 2018-12-07 17:34:19 lastmod: 2021-06-15 22:06:00 status_changed: 2018-12-07 17:34:19 type: proceedings_section metadata_visibility: show creators_name: Mifsud, A creators_name: Haci, D creators_name: Ghoreishizadeh, SS creators_name: Liu, Y creators_name: Constandinou, TG title: Adaptive power regulation and data delivery for multi-module implants ispublished: pub divisions: UCL divisions: A01 divisions: B04 divisions: C05 divisions: F46 keywords: Implants, Uplink, Downlink, Wires, Communication cables, Sensors, Voltage measurement note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. 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. date: 2018-03-29 date_type: published publisher: IEEE official_url: https://doi.org/10.1109/BIOCAS.2017.8325208 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1599335 doi: 10.1109/BIOCAS.2017.8325208 isbn_13: 9781509058037 lyricists_name: Ghoreishizadeh, Seyedeh lyricists_id: SSGHO93 actors_name: Flynn, Bernadette actors_id: BFFLY94 actors_role: owner full_text_status: public publication: 2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings volume: 2018-J place_of_pub: Turin, Italy event_title: 2017 IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017 book_title: Proceedings of the IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017 citation: 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 document_url: https://discovery.ucl.ac.uk/id/eprint/10063267/1/2017_BioCAS_ChestPower_authorcopy.pdf