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A flexible super-capacitive solid-state power supply for miniature implantable medical devices.
- Source :
- Biomedical Microdevices; Dec2013, Vol. 15 Issue 6, p973-983, 11p
- Publication Year :
- 2013
-
Abstract
- We present a high-energy local power supply based on a flexible and solid-state supercapacitor for miniature wireless implantable medical devices. Wireless radio-frequency (RF) powering recharges the supercapacitor through an antenna with an RF rectifier. A power management circuit for the super-capacitive system includes a boost converter to increase the breakdown voltage required for powering device circuits, and a parallel conventional capacitor as an intermediate power source to deliver current spikes during high current transients (e.g., wireless data transmission). The supercapacitor has an extremely high area capacitance of ~1.3 mF/mm <superscript>2</superscript>, and is in the novel form of a 100 μm-thick thin film with the merit of mechanical flexibility and a tailorable size down to 1 mm <superscript>2</superscript> to meet various clinical dimension requirements. We experimentally demonstrate that after fully recharging the capacitor with an external RF powering source, the supercapacitor-based local power supply runs a full system for electromyogram (EMG) recording that consumes ~670 μW with wireless-data-transmission functionality for a period of ~1 s in the absence of additional RF powering. Since the quality of wireless powering for implantable devices is sensitive to the position of those devices within the RF electromagnetic field, this high-energy local power supply plays a crucial role in providing continuous and reliable power for medical device operations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13872176
- Volume :
- 15
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Biomedical Microdevices
- Publication Type :
- Academic Journal
- Accession number :
- 91933410
- Full Text :
- https://doi.org/10.1007/s10544-013-9789-1