Töreyin Hakan, Bhatti Pamela
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0250, USA.
IEEE Trans Biomed Circuits Syst. 2013 Jun;7(3):319-25. doi: 10.1109/TBCAS.2012.2216525.
We report on a vestibular prosthesis signal processor realized using an experimental field programmable analog array (FPAA). Completing signal processing functions in the analog domain, the processor is designed to help replace a malfunctioning inner ear sensory organ, a semicircular canal. Relying on angular head motion detected by an inertial sensor, the signal processor maps angular velocity into meaningful control signals to drive a current stimulator. To demonstrate biphasic pulse control a 1 k Ω resistive load was placed across an H-bridge circuit. When connected to a 2.4 V supply, a biphasic current of 100 μA was maintained at stimulation frequencies from 50-350 Hz, pulsewidths from 25-400 μ sec, and interphase gaps ranging from 25-250 μsec.
我们报告了一种使用实验性现场可编程模拟阵列（FPAA）实现的前庭假体信号处理器。该处理器在模拟域中完成信号处理功能，旨在帮助替代发生故障的内耳感觉器官——半规管。信号处理器依靠惯性传感器检测到的头部角运动，将角速度映射为有意义的控制信号，以驱动电流刺激器。为了演示双相脉冲控制，在一个H桥电路两端连接了一个1kΩ的电阻性负载。当连接到2.4V电源时，在50 - 350Hz的刺激频率、25 - 400μsec的脉冲宽度以及25 - 250μsec的相间间隙下，维持了100μA的双相电流。
