TY - GEN
T1 - An Efficient Wireless Power and Data Transfer System with Current-Modulated Energy-Reuse Back Telemetry and Energy-Adaptive Dual-Input Voltage Regulation
AU - Kim, Minjae
AU - Lee, Hyun Su
AU - Lee, Hyung Min
N1 - Funding Information:
The bottom graph in Fig. 5 analyzes the power consumption of the WPDT system depending on b T schemes. The wireless power Rx (i.e. Rectifier + l Do ) without BT requires 2.4mW input power (Pin) to supply the output power (Pout) of 1.8mW (Vdd=1.8V, lL=1mA), achieving 75% power efficiency. When utilizing the conventional SC-BT (500kbps) to the same WPT Rx, the short-coil switches consume 1.1mW additional power for back telemetry, which significantly increases the required Pin by 46%. On the other hand, when the proposed energy-reuse BT was used for the WPT Rx, the ER-BT consumes 0.65mW, which is 41% less power consumption than SC-BT. The other BT energies were stored and reused for POUT through the adaptive dual LDO, leading to the energy-efficient WPDT system while achieving the same BT data rate of 500kbps. The comparison table in Fig. 6 compares the key performances with state-of-the-art papers in detail. While other papers have utilized the energy-hungry short-coil BT, we propose the current-modulated energy-reuse BT that can save BT energy up to 41% compared to the energy losses during SC-BT. The efficient WPDT system utilizes the adaptive dual-input LDO to optimally reuse the stored BT energy for load against b T condition or load variations. Acknowledgement: This work was supported by the National Research Foundation of Korea (NRF-2020R1F1A1074719) funded by Ministry of Science & ICT. Chip fabrication was supported by IC Design Education Center (IDEC), Korea. References: [1] H.-M. Lee et al., “A power-efficient switched-capacitor stimulating system for electrical/optical deep-brain stimulation,” IEEE JSSC, 2015. [2] W. M. Chen et al., “A fully integrated 8-channel closed-loop neural prosthetic CMOS SoC for real-time epileptic seizure control,” IEEEJSSC, 2014. [3] N. Desai et al., “A scalable, 2.9 mW, 1 Mb/s e-textiles body area network transceiver with remotely-powered nodes and bi-directional data communication,” IEEE JSSC, 2014. [4] C.-H. Cheng et al., “A fully integrated 16-channel closed-loop neural-prosthetic CMOS SoC with wireless power and bidirectional data telemetry for real-time efficient human epileptic seizure control,” IEEE JSSC, 2018. [5] S. Ha et al., “Energy recycling telemetry IC with simultaneous 11.5 mW power and 6.78 Mb/s backward data delivery over a single 13.56 MHz inductive link,” IEEE JSSC, 2016.
Publisher Copyright:
© 2021 IEEE.
PY - 2021/4
Y1 - 2021/4
N2 - Implantable medical devices (IMDs) for bio-signal sensing and stimulation consume power from micro to milli-watt levels, while requiring continuous data telemetry through uplink and downlink. An inductive link with coupled coils can be a promising solution for efficient near-field wireless power transfer as well as bidirectional data telemetry through the power link without additional coil/antenna. The wireless power/data transfer receiver (WPDT Rx) with inductive links requires high power conversion efficiency (PCE) for safe IMD operation and high data rate for continuous telemetry.
AB - Implantable medical devices (IMDs) for bio-signal sensing and stimulation consume power from micro to milli-watt levels, while requiring continuous data telemetry through uplink and downlink. An inductive link with coupled coils can be a promising solution for efficient near-field wireless power transfer as well as bidirectional data telemetry through the power link without additional coil/antenna. The wireless power/data transfer receiver (WPDT Rx) with inductive links requires high power conversion efficiency (PCE) for safe IMD operation and high data rate for continuous telemetry.
UR - http://www.scopus.com/inward/record.url?scp=85107173014&partnerID=8YFLogxK
U2 - 10.1109/CICC51472.2021.9431451
DO - 10.1109/CICC51472.2021.9431451
M3 - Conference contribution
AN - SCOPUS:85107173014
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 2021 IEEE Custom Integrated Circuits Conference, CICC 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Custom Integrated Circuits Conference, CICC 2021
Y2 - 25 April 2021 through 30 April 2021
ER -