Jiang Dai, Cirmirakis Dominik, Schormans Matthew, Perkins Timothy A, Donaldson Nick, Demosthenous Andreas
IEEE Trans Biomed Circuits Syst. 2017 Feb;11(1):64-77. doi: 10.1109/TBCAS.2016.2580513. Epub 2016 Sep 15.
This paper presents a passive phase-shift keying (PPSK) modulator for uplink data transmission for biomedical implants with simultaneous power and data transmission over a single 13.56 MHz inductive link. The PPSK modulator provides a data rate up to 1.35 Mbps with a modulation index between 3% and 38% for a variation of the coupling coefficient between 0.05 and 0.26. This modulation scheme is particularly suited for biomedical implants that have high power demand and low coupling coefficients. The PPSK modulator operates in conjunction with on-off-keying downlink communication. The same inductive link is used to provide up to 100 mW of power to a multi-channel stimulator. The majority of the system on the implant side was implemented as an application specific integrated circuit (ASIC), fabricated in 0.6- [Formula: see text] high voltage CMOS technology. The theory of PPSK modulation, simulated and measured performance evaluation, and comparison with other state-of-the-art impedance modulation techniques is presented. The measured bit error rate around critical coupling at 1.35 Mbps is below 6 ×10.
本文提出了一种用于生物医学植入物上行数据传输的无源相移键控（PPSK）调制器，其可通过单一的13.56 MHz电感链路同时进行功率和数据传输。对于耦合系数在0.05至0.26之间的变化，该PPSK调制器提供高达1.35 Mbps的数据速率，调制指数在3%至38%之间。这种调制方案特别适用于具有高功率需求和低耦合系数的生物医学植入物。PPSK调制器与开关键控下行通信协同工作。同一电感链路用于向多通道刺激器提供高达100 mW的功率。植入侧的大部分系统被实现为采用0.6 - [公式：见正文] 高压CMOS技术制造的专用集成电路（ASIC）。文中介绍了PPSK调制理论、模拟和测量的性能评估以及与其他先进阻抗调制技术的比较。在1.35 Mbps的临界耦合附近测得的误码率低于6×10。
