30.7 A 60Mb/s wideband BCC transceiver with 150pJ/b RX and 31pJ/b TX for emerging wearable applications
30.7 A 60Mb/s wideband BCC transceiver with 150pJ/b RX and 31pJ/b TX for emerging wearable applications
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30.7 A 60Mb/s 宽带 BCC 收发器，具有 150pJ/b RX 和 31pJ/b TX，适用于新兴可穿戴应用
DOI：
10.1109/isscc.2014.6757529
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Je
中科院分区：
文献类型：
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作者：
Junghyup Lee;V. Kulkarni;Ho Chee Keong;J. Cheong;Peng Li;Jun Zhou;Wei;Xin Zhang;Yuan Gao;Kuang;Xin Liu;M. Je
可穿戴技术为未来的健康和移动的体验打开了大门。继头戴式耳机、鞋和健身监测器等第一代可穿戴设备之后，智能眼镜和手表等第二代设备正在进入市场，并有很大的潜力最终取代当前的移动终端平台（图30.7.1）。可穿戴设备可以由用户以最自然的方式携带，并提供全天候的连接，而无需停止所有其他活动，这可以实现完全不同的移动的体验。对于可穿戴设备，身体信道通信（BCC）是传统无线通信的一个很好的替代方案，通过空气，以满足高功率收发器和笨重的天线的需要。然而，目前主要针对生物医学和传感应用的BCC收发器[1]-[5]提供了相当有限的数据速率，高达10 Mb/s，这不足以传输新兴可穿戴智能设备的多媒体数据和高端医疗设备（例如多通道神经记录微系统）的内容丰富的信息。本文提出了一种高能效、鲁棒性强的宽带BCC收发器，该收发器通过采用1）接收前端的高输入阻抗和均衡器，2）采用微分积分器结合注入锁定时钟恢复的瞬态检测RX架构，3）TX端的3级直接数字Walsh编码信令，实现了最大60 Mb/s的数据速率。
Wearable technology is opening the door to future wellness and mobile experience. Following the first generation wearable devices in the form of headsets, shoes and fitness monitors, second generation devices such as smart glasses and watches are making an entrance to the market with a great potential to eventually replace the current mobile device platform eventually (Fig. 30.7.1). Wearable devices can be carried by users in a most natural way and provide all-round connectivity 24-7 without the hassle of stopping all other activities, which enables a totally different mobile experience. For wearable devices, body channel communication (BCC) is an excellent alternative of conventional wireless communication through the air, to obviate the need of high-power transceivers and bulky antennas. However, present BCC transceivers [1]-[5] that mainly target biomedical and sensing applications offer rather limited data rates up to 10Mb/s, which is insufficient in transferring multimedia data for emerging wearable smart devices and content-rich information for high-end medical devices (e.g. multi-channel neural recording microsystems). In this paper, a highly energy-efficient and robust wideband BCC transceiver is presented, which achieves a maximum data rate of 60Mb/s by employing 1) a high input impedance and an equalizer at the RX front-end, 2) transient-detection RX architecture using differentiator-integrator combination coupled with injection-locking-based clock recovery, and 3) 3-level direct digital Walsh-coded signaling at the TX.