An implantable telemetry system for long-term bio-signal recording

Long term neurophysiological studies of un-anesthetized and freely moving animals require an implantable miniaturized telemetry system that can acquire and transmit neural firing patterns and other physiological parameters directly from inside the body. In this paper the design and in vitro results of a long range implantable bio-telemetry system is presented. This system has three main features: wireless inductive powering with implanted rechargeable battery, command signal transmission superimposed on power transfer layer, and long range data transmission (>40 m). These features make this system suitable for long-term telemetry of internal bio-signals from freely moving animals.