Conference paper
A distributed transducer system for functional electrical stimulation
Implanted transducers for functional electrical stimulation (FES) powered by inductive links are subject to conflicting requirements arising from low link efficiency, a low power budget and the need for protection of the weak signals against strong RF electromagnetic fields. We propose a solution to these problems by partitioning the RF transceiver and sensor/actuator functions onto separate integrated circuits.
By amplifying measured neural signals directly at the measurements site and converting them into the digital domain before passing them to the transceiver the signal integrity is less likely to be affected by the inductive link. Neural stimulators are affected to a lesser degree, but still benefit from the partitioning.
As a test case, we have designed a transceiver and a sensor chip which implement this partitioning policy. The transceiver is designed to operate in the 6.78 MHz ISM band and consumes approximately 360 μW. Both chips were implemented in a standard 0.5 μm CMOS technology, and use a 3 V supply voltage.
| Language: | English |
|---|---|
| Year: | 2001 |
| Pages: | 397,398,399,400 |
| Proceedings: | 2001 IEEE 8th International Conference on Electronics, Circuits and Systems |
| ISBN: | 0780370570 and 9780780370579 |
| Types: | Conference paper |
| DOI: | 10.1109/ICECS.2001.957763 |
| ORCIDs: | Bruun, Erik |
0.5 /spl mu/m CMOS 0.5 micron 3 V 3 V supply voltage 360 /spl mu/W 360 muW 6.78 MHz 6.78 MHz ISM band CMOS integrated circuits CMOS technology Electromagnetic fields Electromagnetic measurements Integrated circuit measurements Neuromuscular stimulation Power system protection RF electromagnetic fields RF signals RF transceiver Radio frequency Transceivers Transducers biomedical electronics biomedical implants biomedical transducers digital domain electric sensing devices functional electrical stimulation inductive links link efficiency microactuators microsensors neural signals neural stimulators neuromuscular stimulation partitioning power supplies to apparatus prosthetics protection radiofrequency interference signal integrity signal processing equipment transceiver transceivers weak signals
