Kilinc Enver G, Ghanad Mehrdad A, Maloberti Franco, Dehollain Catherine
IEEE Trans Biomed Circuits Syst. 2015 Feb;9(1):113-23. doi: 10.1109/TBCAS.2014.2321524. Epub 2014 Jun 27.
An universal remote powering and communication system is presented for the implantable medical devices. The system be interfaced with different sensors or actuators. A mobile external unit controls the operation of the implantable chip and reads the sensor's data. A locator system is proposed to align the mobile unit with the implant unit for the efficient magnetic power transfer. The location of the implant is detected with 6 mm resolution from the rectified voltage level at the implanted side. The rectified voltage level is fedback to the mobile unit to adjust the magnetic field strength and maximize the efficiency of the remote powering system. The sensor's data are transmitted by using a free running oscillator modulated with on-off key scheme. To tolerate large data carrier drifts, a custom designed receiver is implemented for the mobile unit. The circuits have been fabricated in 0.18 um CMOS technology. The remote powering link is optimized to deliver power at 13.56 MHz. On chip voltage regulator creates 1.8 V from a 0.9 V reference voltage to supply the sensor/actuator blocks. The implantable chip dissipates 595 μW and requires 1.48 V for start up.
本文提出了一种用于植入式医疗设备的通用远程供电和通信系统。该系统可与不同的传感器或执行器接口。一个移动外部单元控制植入式芯片的操作并读取传感器数据。提出了一种定位系统，用于将移动单元与植入单元对齐，以实现高效的磁功率传输。通过植入侧的整流电压电平以6毫米的分辨率检测植入物的位置。整流电压电平被反馈到移动单元，以调整磁场强度并最大化远程供电系统的效率。传感器数据通过使用开关键控调制的自由运行振荡器进行传输。为了容忍大数据载波漂移，为移动单元实现了一个定制设计的接收器。这些电路采用0.18微米CMOS技术制造。远程供电链路经过优化，可在13.56兆赫兹下供电。片上稳压器从0.9伏参考电压产生1.8伏电压，为传感器/执行器模块供电。植入式芯片功耗为595微瓦，启动需要1.48伏电压。
