A frequency boosting technique for cold-start charge pump units

Article Engineering, Electrical & Electronic

An Adaptive Fully Integrated Dual-Output Energy Harvesting System With MPPT and Storage Capability

Basem Abdelaziz Abdelmagid et al.

Summary: This paper presents a fully-integrated adaptive dual-output power management system with storage capability for thermoelectric energy harvesting applications. The system utilizes a primary path implemented with a 5-stage reconfigurable Dickson charge pump to deliver load power at a regulated voltage of 1.6 V. A secondary path is enabled to store excess energy on a supercapacitor and provides a second output that can charge up to twice the voltage of the first output. The proposed system not only stores excess energy but also uses the secondary path for regulating the first output and achieving maximum power point tracking of the input source.

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS (2023)

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Article Engineering, Electrical & Electronic

Ultra-Low-Power Low-Input-Voltage Charge Pump for Micro-Energy Harvesting Applications

Oscar Pereira-Rial et al.

Summary: This paper presents a subthreshold input voltage charge pump based on the cross-coupled voltage doubler and boosted gate voltages for the transfer switches. A novel inverter architecture called negative low-state voltage inverter is proposed to generate clock signals for switching transistors and improve their drive capability. Experimental characterization of silicon prototypes in 180 nm CMOS technology demonstrates that the proposed scheme can pump charge from an input voltage as low as 110 mV, with a peak efficiency above 70% for input voltages between 180 mV and 400 mV and input power levels ranging from 45 nW to 25 mu W, suitable for miniaturized transducers on chip.

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS (2023)

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Review Chemistry, Analytical

A Review of Converter Circuits for Ambient Micro Energy Harvesting

Qian Lian et al.

Summary: This paper provides an overview of energy harvesting technology, describing methods for extracting energy from various sources and summarizing the characteristics of different energy sources and applicable circuit structures. It discusses the pros and cons of the circuits and future directions, highlighting the importance of MPPT as a method for improving system efficiency.

MICROMACHINES (2022)

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Review Engineering, Electrical & Electronic

Powering Solutions for Biomedical Sensors and Implants Inside the Human Body: A Comprehensive Review on Energy Harvesting Units, Energy Storage, and Wireless Power Transfer Techniques

Sourov Roy et al.

Summary: This article discusses the issues and challenges of harvesting energy for implantable medical devices, and provides an overview of existing energy storage technologies and wireless power transfer techniques. It also presents a survey of existing implantable solutions in terms of performance and power constraints.

IEEE TRANSACTIONS ON POWER ELECTRONICS (2022)

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Review Energy & Fuels

Switched Capacitor DC-DC Converters: A Survey on the Main Topologies, Design Characteristics, and Applications

Alencar Franco de Souza et al.

Summary: This work reviews the main topologies of switched capacitors used in DC-DC power conversion, analyzing basic configurations, semiconductor and capacitor choices, impact on converter behavior, and operation under different charge conditions. Control methods for voltage regulation in SC converters are discussed, as well as practical applications and the potential for designing higher power level converters.

ENERGIES (2021)

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Article Engineering, Electrical & Electronic