Design of implantable wireless biomedical signals telemetry system

For the measurement of biomedical signals in the under body, a miniaturized implantable wireless telemetry system is implemented. This overall system consists of a charging system, an IR receiver, a multi-channel signal processor and a FM transmitter. All the parts are packed in the titanium case of which size is 50(L)/spl times/27(W)/spl times/7(H) mm. To control the implanted device at the external body and utilize the advantages of the simplification of circuit structure and the reduction of power consumption, an infrared wireless communication method has been adopted. The implements system uses a unique data protocol to prevent the interferences from other infrared remote control of the household appliances. The surface of the implanted device has been coated by biocompatible material to be implanted in the body. This system can be applied to measurements system of various kinds of bio-signals such as bio-electrical, bio-chemical and bio-mechanical signals, including EMG, ECG, insulin level, blood pressure signal etc.