Energy-Efficient Start-Up Dickson Charge Pump for Batteryless Biomedical Implant Devices

Oo Htet, K., Moradi, F., Ghannam, R. and Heidari, H. (2020) Energy-Efficient Start-Up Dickson Charge Pump for Batteryless Biomedical Implant Devices. In: 2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Glasgow, Scotland, 23-25 Nov 2020, ISBN 9781728160443 (doi: 10.1109/ICECS49266.2020.9294827)

Abstract

This paper presents a power management concept for solar energy harvesting power management using an on-chip switched-capacitor (SC) DC-DC converter for biomedical implantable applications. This design eliminates potential reversion losses caused by the switching scheme. It also mitigates the bottom plate loss by employing the charge recycling technique. Moreover, instead of using a single step clock pulse, the two-step adiabatic charge sharing clock helps reduce the energy drawn from the PV cell by 65%. Furthermore, with the help of clock disabler scheme, the power dissipation has been further reduced by disabling the entire start-up charge pump once the desired reference output voltage was reached. However, due to additional circuitry for the clock disabler, there is a tradeoff between power efficiency and power dissipation. The proposed system was implemented and fabricated in a standard 0.18-µm TSMC RF CMOS technology. The proposed converter has achieved a maximum efficiency of 73%.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ghannam, Professor Rami and Heidari, Professor Hadi and Oo Htet, Kaung
• Authors: Oo Htet, K., Moradi, F., Ghannam, R., and Heidari, H.
• College/School: College of Science and Engineering > School of Engineering > Biomedical Engineering; College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• ISBN: 9781728160443
• Copyright Holders: Copyright © 2020 IEEE
• First Published: First published in 2020 27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

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