Name
Title | ||
|---|---|---|
Inductive and Ultrasonic Multi-Tier Interface for Low-Power, Deeply Implantable Medical Devices |
Abstract | ||
|---|---|---|
We report the development of a novel multi-tier interface which enables the wireless, noninvasive transfer of sufficient amounts of power as well as the collection and transmission of data from low-power, deeply implantable analog sensors. The interface consists of an inductive coupling subsystem and an ultrasonic subsystem. The designed and experimentally verified inductive subsystem ensures that 5 W of power is transferred across 10 mm of air gap between a single pair of PCB spiral coils with an efficiency of 83% using our prototype CMOS logic gate-based driver circuit. The implemented ultrasonic subsystem, based on ultrasonic PZT ceramic discs driven in their low-frequency, radial/planar-excitation mode, further ensures that 29 μW of power is delivered 70 mm deeper inside a homogenous liquid environment-with no acoustic matching layer employed-with an efficiency of 1%. Overall system power consumption is 2.3 W. The implant is intermittently powered every 800 msec; charging a capacitor which provides sufficient power for a duration of ~ 18 msec; sufficient for an implant μC operating at a frequency of 500 KHz to transmit a nibble (4 bits) of digitized sensed data. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/TBCAS.2011.2175390 | Biomedical Circuits and Systems, IEEE Transactions |
Keywords | DocType | Volume |
CMOS logic circuits,biomedical communication,biomedical electronics,data communication,driver circuits,inductive power transmission,logic gates,low-power electronics,piezoceramics,piezoelectric transducers,prosthetics,ultrasonic transducers,wireless sensor networks,CMOS logic gate based driver circuit,PCB spiral coils,capacitor charging,data collection,data transmission,digitized sensed data,distance 10 mm,inductive coupling subsystem,inductive ultrasonic multitier interface,low frequency driven ultrasonic PZT ceramic discs,low power deeply implantable analog sensors,low power deeply implantable medical devices,planar excitation mode,power 2.3 W,power 29 muW,power 5 W,radial excitation mode,ultrasonic subsystem,wireless noninvasive power transfer,Inductive interface for implantable medical devices (IMDs),powering implantable medical devices,ultrasonic interface for IMDs | Journal | 6 |
Issue | ISSN | Citations |
4 | 1932-4545 | 6 |
PageRank | References | Authors |
0.61 | 6 | 3 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Ayodele Sanni | 1 | 6 | 0.61 |
| Antonio Vilches | 2 | 6 | 0.61 |
| Christofer Toumazou | 3 | 265 | 59.06 |