Abstract
Wireless intra-body communication is a promising approach for providing efficient and secure connectivity for medical implants. The low power consumption of the electronics and the conductivity of the biological tissues facilitate the system implementation, which makes the technique more power-efficient than the traditional radio frequency wireless systems. The galvanic intra-body communication uses the electrical current for signal transmission in the conductive medium of the biological tissues. In this paper, we propose an ultra-low-power communication approach by implementing a galvanic impulse method for communication between an implant and an on-body device. The communication system is designed, manufactured with off-the-shelf electronic components, and measured in the phantom and in-vivo animal experiment. The implant power consumption is 45 μW for the data rate of 64 kbps with a bit error percentage below 0.5% for the implant depth of 14 cm. The design supports long-lasting battery-powered implant sensory and communication system.
Highlights
W IRELESS health-care monitoring is an emerging technology that overcomes the limitations of conventional clinical methods
The main advantage of using radio frequency (RF) is the high available bandwidth that can support a high data rate, while most implant sensors require low data rate [1], except in some visual inspections in which a high data rate sensor is involved such as video capsule endoscopy [2] or neural implants for recording brain signals
An ultra-low-power data telemetry for biomedical deep implants based on galvanic impulse is proposed
Summary
W IRELESS health-care monitoring is an emerging technology that overcomes the limitations of conventional clinical methods. 1.18 cm cm cm 14 cm approach because the active duty cycle in comparison to the bit duration is very low This leads to having total power consumption less than the narrow band RF links [5]. To support deep implant communication using UWB at GHz frequencies, the transmitter power should be increased dramatically because of the high signal attenuation in biological tissues in GHz band. Low power consumption: due to the low path loss and low-frequency operation of the galvanic links, the overall power consumption is potentially less than the other methods By considering these facts, a low power galvanic impulse link is proposed for intra-body communication.
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