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A Wireless Biomedical Signal Interface System-on-Chip for Body Sensor Networks

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7 Author(s)
Lei Wang ; Shenzhen Inst. of Adv. Technol., Chinese Acad. of Sci., Shenzhen, China ; Guang-Zhong Yang ; Jin Huang ; Jinyong Zhang
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Recent years have seen the rapid development of biosensor technology, system-on-chip design, wireless technology. and ubiquitous computing. When assembled into an autonomous body sensor network (BSN), the technologies become powerful tools in well-being monitoring, medical diagnostics, and personal connectivity. In this paper, we describe the first demonstration of a fully customized mixed-signal silicon chip that has most of the attributes required for use in a wearable or implantable BSN. Our intellectual-property blocks include low-power analog sensor interface for temperature and pH, a data multiplexing and conversion module, a digital platform based around an 8-b microcontroller, data encoding for spread-spectrum wireless transmission, and a RF section requiring very few off-chip components. The chip has been fully evaluated and tested by connection to external sensors, and it satisfied typical system requirements.

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Biomedical Circuits and Systems, IEEE Transactions on  (Volume:4 ,  Issue: 2 )