A Multichannel Neuromuscular Microstimulator With Bi-directional Telemetry

摘要

This paper presents a multichannel implantable microstimulator to be used for functional neuromuscular stimulation (FNS). The microstimulator receives power and data through wireless RF telemetry and incorporates voltage regulators, clock recovery, data detection, output drivers, and an active on-chip transmitter onto a single BiCMOS IC chip measuring 1.4mmx13.5mm and dissipating only 40mW of power. The chip can deliver programmable amplitude (1-10mA) and duration (1- 256/spl mu/sec) current pulses into tissue through eight on-chip electrodes. An on chip transmitter and integrated coil allow data transmission out on an AM modulated 33MHz RF carrier for closed-loop system control.