A 13.56MHz Wireless Power and Data Transfer Receiver Achieving 75.4% Effective-Power-Conversion Efficiency with 0.1% ASK Modulation Depth and 9.2mW Output Power
A 13.56MHz Wireless Power and Data Transfer Receiver Achieving 75.4% Effective-Power-Conversion Efficiency with 0.1% ASK Modulation Depth and 9.2mW Output Power
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A%2013.56MHz%20无线%20功率%20和%20数据%20传输%20接收器%20实现%2075.4%%20有效功率转换%20效率%20和%200.1%%20ASK%20调制%20深度%20和%209.2mW%20输出%20功率
DOI：
10.1109/isscc.2018.8310224
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Chuanjin Richard Shi
中科院分区：
文献类型：
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作者：
Yu Wang;D. Ye;Liangjian Lyu;Yingfei Xiang;Hao Min;Chuanjin Richard Shi
植入式和可穿戴设备在生物医学系统中需要无线功率传输 (WPT) 和无线数据传输 (WDT) [1-3]，例如神经记录应用 [4]。通常，幅度调制 (AM) 在这些应用中是首选，因为它具有较低的功耗和解调（解调）电路的复杂性。为了实现所需的低于 10−3 的误码率 (BER)，需要较大的调制深度 (MD)，通常在 8% 到 100% 的范围内。不幸的是，如图 8.4.1 所示，在低幅度时间间隔 (t2) 期间，线圈上的可用功率相对于 1-MD 呈二次方减小。大 MD 会导致有效功率转换效率 (EPCE) 较低，EPCE 定义为 WPT 接收器的调制和整流的综合效率。该问题的一种解决方案是使用两种不同的频率将电源和数据链路分开[2-4]。这需要额外的线圈或天线，并且相应的（解）调器消耗更高的功率，不适合紧凑型超低功耗设计。之前尚未解决的挑战是如何使用相同的线圈（频率）来传输最大功率（因此高 WPT EPCE），同时实现所需的 BER。
Implantable and wearable devices require both wireless power transfer (WPT) and wireless data transmission (WDT) in biomedical systems [1-3], e.g., neural recording applications [4]. Very often, amplitude modulation (AM) is preferred in these applications due to its lower power consumption and less circuit complexity in (de)modulation. To achieve the required bit-error rate (BER) lower than 10−3, a large modulation depth (MD), typically in the range of 8% to 100%, is needed. Unfortunately, as shown in Fig. 8.4.1, the available power on the coil is reduced quadratically with respect to 1-MD during the low-amplitude time interval (t2). Large MD leads to low effective power-conversion efficiency (EPCE), defined as the combined efficiency of modulation and rectification of the WPT receiver. One solution to this problem is to separate the power and data link using two different frequencies [2-4]. This requires an extra coil or antenna, and the corresponding (de)modulator consumes higher power, not suitable for compact ultra-low power design. The challenge, which has not been addressed previously, is how to use the same coil (frequency) to transfer the maximal power (thus high WPT EPCE) while achieving the required BER.