Title :
Externally powered implantable FES system
Author :
Takahashi, K. ; Kikuchi, M. ; Takeuchi, S. ; Hoshimiya, N. ; Mastuki, H. ; Handa, Y.
Author_Institution :
Fac. of Eng., Saitama Univ., Urawa, Japan
Abstract :
We have developed an implantable stimulation unit for multichannel functional electrical stimulation (FES) system applied to the restoration of motor functions. The stimulation unit implanted in the body is externally controlled and powered by an encoded carrier radio frequency of 1 MHz and a continuous frequency of 100 kHz, respectively. A new type of RF coil utilizing amorphous magnetic fibers was introduced to realize highly efficient power transmission. Up to 16 independently controlled stimulus output channels are provided, with output channel selection, stimulus pulse amplitude and stimulus pulse rate controlled externally by the packet transmission method. A constant voltage stimulus pulse is generated with the D/A converter in the circuit of the implanted unit
Keywords :
biomedical equipment; muscle; neurophysiology; patient treatment; power transmission; prosthetic power supplies; D/A converter; RF coil; amorphous magnetic fibers; encoded carrier radio frequency; implantable stimulation unit; multichannel functional electrical stimulation; output channel selection; power transmission; restoration of motor functions; stimulus pulse amplitude; stimulus pulse rate; Amorphous magnetic materials; Amorphous materials; Coils; Neuromuscular stimulation; Power system restoration; Power transmission; Pulse circuits; Radio control; Radio frequency; Voltage;
Conference_Titel :
Micro Machine and Human Science, 1995. MHS '95., Proceedings of the Sixth International Symposium on
Conference_Location :
Nagoya
Print_ISBN :
0-7803-2676-8
DOI :
10.1109/MHS.1995.494228
