Wireless sensor networks

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A Fully-Integrated Wireless Ingestible CMOS Drug-Delivery Chip With Electrochemical Energy Harvesting and pH-Adaptive MPPT for Personalized Therapeutics

A Fully-Integrated Wireless Ingestible CMOS Drug-Delivery Chip With Electrochemical Energy Harvesting and pH-Adaptive MPPT for Personalized Therapeutics 150 150
Author(s): So-Yoon Yang, Deniz Umut Yildirim, Saransh Sharma, Donghyeon Han, Rishabh Mittal, Husna T. Ellis, Jaehong Jung, Eunseok Lee, Yubin Cai, Giovanni Traverso, Anantha P. Chandrakasan

Abstract:

The rapid growth of personalized medicine has driven increased demand for battery-free, energy-efficient ingestible electronics for on-demand gastrointestinal (GI) drug delivery. This article presents the first fully-integrated, battery-free ingestible CMOS platform that harvests energy from a galvanic cell (GC) through a reconfigurable switched-capacitor converter, with pH-adaptive maximum power point tracking (…

Published in: IEEE Journal of Solid-State Circuits
Page(s): 1082 – 1095
Year of Publication: 2026
Electronic ISSN: 1558-173X
DOI: 10.1109/JSSC.2025.3647275
Publisher: IEEE

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A Battery-Free BLE Backscatter Communication Chip for Wearable Systems

A Battery-Free BLE Backscatter Communication Chip for Wearable Systems 150 150
Author(s): Yongling Zhang, Ji Xiong, Junzai Chen, Xiaoyu Li, Jinrui Zuo, Yan Wang, Xiaoyi Wang, Miao Meng

Abstract:

This letter presents a backscatter chip that features bidirectional communication with commodity bluetooth low-energy (BLE) transceivers. For uplink, the chip reflects a reverse-whitened BLE tone into single-sideband (SSB) GFSK-modulated BLE packets via a proposed replica VCO-based GFSK modulator and an inductor-free SSB reflector. For downlink, the BLE packets are frequency …

Published in: IEEE Solid-State Circuits Letters
Page(s): 297 – 300
Year of Publication: 2025
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2025.3612423
Publisher: IEEE

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