A Remotely Powered Implantable Biomedical System With Location Detector
A Remotely Powered Implantable Biomedical System With Location Detector
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DOI：
10.1109/tbcas.2014.2321524
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发表时间：
2015-02
影响因子：
5.1
通讯作者：
Enver G. Kilinc;M. Ghanad;F. Maloberti;C. Dehollain
中科院分区：
文献类型：
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作者：
Enver G. Kilinc;M. Ghanad;F. Maloberti;C. Dehollain
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。该系统可以与不同的传感器或执行器连接。移动外部单元控制植入芯片的操作并读取传感器的数据。提出了一种定位器系统来将移动单元与植入单元对准，以实现有效的磁功率传输。根据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。整流后的电压电平反馈到移动单元，以调整磁场强度并最大限度地提高远程供电系统的效率。传感器的数据通过使用采用开关键方案调制的自由运行振荡器来传输。为了容忍大的数据载体漂移，为移动单元实现了定制设计的接收器。该电路采用 0.18 um CMOS 技术制造。远程供电链路经过优化，可提供 13.56 MHz 的电力。片上电压调节器从 0.9 V 参考电压产生 1.8 V 电压，为传感器/执行器模块供电。该植入式芯片功耗为 595 μW，启动电压为 1.48 V。
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.