神经信号遥测模块及电路的设计与实现

Telemetry Circuit and Module Design for Neural Signal Transmission

介绍了一种可用于植入式中枢神经恢复系统遥测模块的设计与实现。模块由信号发射电路和接收电路组成,发射电路完成信号的多路选择、模/数转换、编码、调制和功率放大;接收电路完成放大、解调、解码、数/模转换和滤波等功能。电路工作于3.3V,正常工作时发送端功耗小于110mW,接收端功耗小于100mW,有效传输距离大于30m。根据神经信号的特点,采样率为50kHz,数据传输速率为1Mbit/s。收发电路采用印刷电路板(PCB)实现,工作于2.45GHz的ISM频段。测试结果表明,该模块能够很好的实现神经信号的遥测功能。

A telemetry module for neural signal transmission has been designed, realized and measured, It consists of a transmitter and a receiver. Five functions are realized in the transmitter： multiple selection, analog/digital conversion, coding, modulation, and power amplification. Accordingly, five functions are completed in the receiver： signal amplifying, demodulation, decoding, digital/analog conversion and filtering. The supply voltage is 3. 3 V. The power consumption of the transmitter is less than 110 mW, and that of the receiver is less than 100 mW. The effective transmission distance is more than 30 m. According to the spectrum of neural signal, the sampling rate is 50 kHz, and data transfer rate is 1 Mbit/s. The circuits were fabricated on a printed circuit board （PCB）, The working frequency is 2. 45 GHz,which belongs to one of ISM（Industrial Scientific Medical） frequency bands. Based on the measure results, the circuits can achieve neural signal telemetry as we expected.