A 25 mV-startup cold start system with on-chip magnetics for thermal energy harvesting

Garcha, Preet; El-Damak, Dina; Desai, Nachiket; Troncoso, Jorge; Mazotti, Erika; Mullenix, Joyce; Tang, S. C.; Trombley, Django; Buss, D.D.; Lang, Jeffrey H.; Chandrakasan, Anantha P.

doi:10.1109/esscirc.2017.8094542

Cited by 7 publications

(1 citation statement)

References 7 publications

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“…However, both inductor and transformer-based start-up schemes require additional offchip magnetic components that limit device miniaturization. Recently, Garcha et al proposed a fully integrated start-up solution using a Meissner Oscillator (MO) with an on-chip transformer that could achieve startup voltage as low as 25 mV [193].…”

Section: Startup Issuesmentioning

confidence: 99%

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

Roy

Azad

Baidya

et al. 2021

IEEE Trans. Power Electron.

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Section: Startup Issuesmentioning

confidence: 99%

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

Roy

Azad

Baidya

et al. 2021

IEEE Trans. Power Electron.

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Optimal control applied to TEG harvesting: The necessity of a ring oscillator

García

Robein

2021

Int J Energy Res

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In this article, unlike the available literature, an optimal theorem is presented to design conditioning circuits for thermoelectric generator (TEG) energy harvesting without previous ad-hoc assumptions about the electric/electronic structure. The results show that simple linear time-invariant (LTI) conditioning circuits plus an extra non-linear element transforming the TEG's constant voltage into a square wave (ring oscillator) are in fact the optimal choice to pick up the biggest output's energy. This research opens the door to new developments: ring oscillators with ultra-low voltages (less than 1 mV) and nonlinear optimal control techniques applied to micro energy harvesting. Real measurement along with LT-Spice simulations is presented to validate the theoretical results, presenting transfer functions for simulation and modeling purposes.

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Concept of an efficient self-startup voltage converter with dynamic maximum power point tracking for microscale thermoelectric generators

et al. 2022

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Microscale Thermoelectric Generators (microTEGs) have a high application potential for energy harvesting for autonomous microsystems. In contrast to conventional thermoelectric generators, microTEGs can only supply small output-voltages. Therefore, voltage converters are required to provide supply-voltages that are sufficiently high to power microelectronics. However, for high conversion efficiency, voltage converters need to be optimized for the limited input voltage range and the typically high internal resistance of microTEGs. To overcome the limitations of conventional voltage converters we present an optimized self-startup voltage converter with dynamic maximum power point tracking. The performance potential of our concept is theoretically and experimentally analyzed. The voltage conversion interface demonstrates energy harvesting from open-circuit voltages as low as 30.7 mV, and enables independent and full start-up from 131 mV. No additional external power supply is required at any time during operation. It can be operated with a wide range of internal resistances from 20.6 to − 4 kΩ with a conversation efficiency between η = 68–79%.

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A 25 mV-startup cold start system with on-chip magnetics for thermal energy harvesting

Cited by 7 publications

References 7 publications

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

A Comprehensive Review on Rectifiers, Linear Regulators, and Switched-Mode Power Processing Techniques for Biomedical Sensors and Implants Utilizing in-Body Energy Harvesting and External Power Delivery

Optimal control applied to TEG harvesting: The necessity of a ring oscillator

Concept of an efficient self-startup voltage converter with dynamic maximum power point tracking for microscale thermoelectric generators

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