alexa An Energy-Efficient ASIC for Wireless Body Sensor Networks in Medical Applications
Engineering

Engineering

Journal of Telecommunications System & Management

Author(s): Xiaoyu Zhang, Hanjun Jiang, Lingwei Zhang, Chun Zhang, Zhihua Wang

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An energy-efficient application-specific integrated circuit (ASIC) featured with a work-on-demand protocol is designed for wireless body sensor networks (WBSNs) in medical applications. Dedicated for ultra-low-power wireless sensor nodes, the ASIC consists of a low-power microcontroller unit (MCU), a power-management unit (PMU), reconfigurable sensor interfaces, communication ports controlling a wireless transceiver, and an integrated passive radio-frequency (RF) receiver with energy harvesting ability. The MCU, together with the PMU, provides quite flexible communication and power-control modes for energy-efficient operations. The always-on passive RF receiver with an RF energy harvesting block offers the sensor nodes the capability of work-on-demand with zero standby power. Fabricated in standard 0.18-ým complementary metal-oxide semiconductor technology, the ASIC occupies a die area of 2 mm ý 2.5 mm. A wireless body sensor network sensor-node prototype using this ASIC only consumes < 10-nA current under the passive standby mode, and < 10 ýA under the active standby mode, when supplied by a 3-V battery.

This article was published in IEEE and referenced in Journal of Telecommunications System & Management

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