A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices

Hyun Su Lee; Minjae Kim; Jisan Ahn; Hyung Min Lee

doi:10.1109/BioCAS49922.2021.9644982

A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices

Hyun Su Lee, Minjae Kim, Jisan Ahn, Hyung Min Lee

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

This paper presents a hybrid load-shift-keying (LSK) system for load-insensitive back telemetry to realize near-constant voltage changes on a primary coil against a wide range of load variations. The hybrid-LSK-enabled full-wave rectifier includes built-in open-coil and short-coil functions for hybrid-LSK modulation. When the load changes from 50 Ω to 50 \mathrm{k}\Omega, the variation of voltage change levels on the primary coil can be minimized to 60 mV, achieving 88% reduction compared to the conventional short-coil LSK with 510 mV variation. The 180-nm CMOS hybrid-LSK prototype verified that the normalized variation of voltage changes (VARvc) was reduced by 34.1% compared to short-coil LSK. The primary coil voltage changes can be demodulated with slope detection, enabling robust back telemetry against load variations.

Original language	English
Title of host publication	BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728172040
DOIs	https://doi.org/10.1109/BioCAS49922.2021.9644982
Publication status	Published - 2021
Event	2021 IEEE Biomedical Circuits and Systems Conference, BioCAS 2021 - Virtual, Online, Germany Duration: 2021 Oct 6 → 2021 Oct 9

Publication series

Name	BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings

Conference

Conference	2021 IEEE Biomedical Circuits and Systems Conference, BioCAS 2021
Country/Territory	Germany
City	Virtual, Online
Period	21/10/6 → 21/10/9

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

Back telemetry
hybrid load-shift-keying (LSK)
load-insensitive
slope detector
wireless power transfer

ASJC Scopus subject areas

Hardware and Architecture
Biomedical Engineering
Electrical and Electronic Engineering

Access to Document

10.1109/BioCAS49922.2021.9644982

Cite this

Lee, H. S., Kim, M., Ahn, J., & Lee, H. M. (2021). A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices. In BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings (BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BioCAS49922.2021.9644982

A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices. / Lee, Hyun Su; Kim, Minjae; Ahn, Jisan et al.
BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2021. (BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Lee, HS, Kim, M, Ahn, J & Lee, HM 2021, A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices. in BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings. BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings, Institute of Electrical and Electronics Engineers Inc., 2021 IEEE Biomedical Circuits and Systems Conference, BioCAS 2021, Virtual, Online, Germany, 21/10/6. https://doi.org/10.1109/BioCAS49922.2021.9644982

Lee HS, Kim M, Ahn J, Lee HM. A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices. In BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2021. (BioCAS 2021 - IEEE Biomedical Circuits and Systems Conference, Proceedings). doi: 10.1109/BioCAS49922.2021.9644982

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title = "A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices",

abstract = "This paper presents a hybrid load-shift-keying (LSK) system for load-insensitive back telemetry to realize near-constant voltage changes on a primary coil against a wide range of load variations. The hybrid-LSK-enabled full-wave rectifier includes built-in open-coil and short-coil functions for hybrid-LSK modulation. When the load changes from 50 Ω to 50 \mathrm{k}\Omega, the variation of voltage change levels on the primary coil can be minimized to 60 mV, achieving 88% reduction compared to the conventional short-coil LSK with 510 mV variation. The 180-nm CMOS hybrid-LSK prototype verified that the normalized variation of voltage changes (VARvc) was reduced by 34.1% compared to short-coil LSK. The primary coil voltage changes can be demodulated with slope detection, enabling robust back telemetry against load variations.",

keywords = "Back telemetry, hybrid load-shift-keying (LSK), load-insensitive, slope detector, wireless power transfer",

author = "Lee, {Hyun Su} and Minjae Kim and Jisan Ahn and Lee, {Hyung Min}",

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N2 - This paper presents a hybrid load-shift-keying (LSK) system for load-insensitive back telemetry to realize near-constant voltage changes on a primary coil against a wide range of load variations. The hybrid-LSK-enabled full-wave rectifier includes built-in open-coil and short-coil functions for hybrid-LSK modulation. When the load changes from 50 Ω to 50 \mathrm{k}\Omega, the variation of voltage change levels on the primary coil can be minimized to 60 mV, achieving 88% reduction compared to the conventional short-coil LSK with 510 mV variation. The 180-nm CMOS hybrid-LSK prototype verified that the normalized variation of voltage changes (VARvc) was reduced by 34.1% compared to short-coil LSK. The primary coil voltage changes can be demodulated with slope detection, enabling robust back telemetry against load variations.

AB - This paper presents a hybrid load-shift-keying (LSK) system for load-insensitive back telemetry to realize near-constant voltage changes on a primary coil against a wide range of load variations. The hybrid-LSK-enabled full-wave rectifier includes built-in open-coil and short-coil functions for hybrid-LSK modulation. When the load changes from 50 Ω to 50 \mathrm{k}\Omega, the variation of voltage change levels on the primary coil can be minimized to 60 mV, achieving 88% reduction compared to the conventional short-coil LSK with 510 mV variation. The 180-nm CMOS hybrid-LSK prototype verified that the normalized variation of voltage changes (VARvc) was reduced by 34.1% compared to short-coil LSK. The primary coil voltage changes can be demodulated with slope detection, enabling robust back telemetry against load variations.

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A Load-Insensitive Hybrid Back Telemetry System for Wirelessly-Powered Implantable Devices

Abstract

Publication series

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Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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