A Fully-Integrated Biofuel-Cell-Based Energy Harvester with 86% Peak Efficiency and 0.25V Minimum Input Voltage Using Source-Adaptive MPPT

Talkhooncheh, Arian Hashemi; You, Yu-Wei; Agarwal, Abhinav; Kuo, William Wei-Ting; Chen, Kuan-Chang Xavier; Wang, Minwo; Hoskuldsdottir, Gudrun; Gao, Wei; Emami, Azita

doi:10.1109/cicc48029.2020.9075912

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…On the other hand, in our work, the converter was designed for ultra-low voltage ICs; therefore, the output voltage was much lower than 1 V. The maximum peak current of 38 µA was achieved for the input voltage of 0.2 V. If the input voltage increased, the output current of more than 100 µA can be reached. The power conversion efficiency of the proposed converter is better than the one reported in the state-of-the art works, except for [ 40 , 41 , 45 ]. However, the converters presented in [ 40 , 41 ] are designed for higher values of the output voltage.…”

Section: Discussionmentioning

confidence: 68%

Low-Voltage DC-DC Converter for IoT and On-Chip Energy Harvester Applications

Potocny¹,

Kovac²,

Arbet³

et al. 2021

Sensors

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The power saving issue and clean energy harvesting for wireless and cost-affordable electronics (e.g., IoT applications, sensor nodes or medical implants), have recently become attractive research topics. With this in mind, the paper addresses one of the most important parts of the energy conversion system chain – the power management unit. The core of such a unit will be formed by an inductorless, low-voltage DC-DC converter based on the cross-coupled dynamic-threshold charge pump topology. The charge pump utilizes a power-efficient ON/OFF regulation feedback loop, specially designed for strict low-voltage start-up conditions by a driver booster. Taken together, they serve as the masters to control the charge pump output (up to 600 mV), depending on the voltage value produced by a renewable energy source available in the environment. The low-power feature is also ensured by a careful design of the hysteresis-based bulk-driven comparator and fully integrated switched-capacitor voltage divider, omitting the static power consumption. The presented converter can also employ the on-chip RF-based energy harvester for use in a wireless power transfer system.

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Section: Discussionmentioning

confidence: 68%

Low-Voltage DC-DC Converter for IoT and On-Chip Energy Harvester Applications

Potocny¹,

Kovac²,

Arbet³

et al. 2021

Sensors

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“…Although with the ultra-low-power frontend techniques, a transmitter circuit (TX) for wireless communication is typically the most power-consuming component of these systems. In previous works, the power of entire systems was on the order of tens of μW [1], which is difficult to achieve even with the state-of-the-art BFC energy harvester [10], [11]. Moreover, most of the BFCs are with a bulky size of mm 2 level, which is infeasible to be accommodated in contact lenses.…”

Section: Introductionmentioning

confidence: 99%

A Solar-Cell-Assisted, 99% Biofuel Cell Area Reduced, Biofuel-Cell-Powered Wireless Biosensing System in 65nm CMOS for Continuous Glucose Monitoring Contact Lenses

CHEN

Niitsu²

2022

IEICE Trans. Electron.

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This brief proposes a solar-cell-assisted wireless biosensing system that operates using a biofuel cell (BFC). To facilitate BFC area reduction for the use of this system in area-constrained continuous glucose monitoring contact lenses, an energy harvester combined with an on-chip solar cell is introduced as a dedicated power source for the transmitter. A dual-oscillator-based supply voltage monitor is employed to convert the BFC output into digital codes. From measurements of the test chip fabricated in 65-nm CMOS technology, the proposed system can achieve 99% BFC area reduction.

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