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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 design and implementation of telemetry module for implantable central nervous system restoration is introduced. The module consists of a signal transmitting circuit and a receiving circuit. The transmitting circuit completes signal multiplexing, analog / digital conversion, encoding, modulation and power amplification. The receiving circuit completes the functions of amplification, demodulation, decoding, digital / analog conversion and filtering. The circuit works at 3.3V. The power consumption of the transmitter during normal operation is less than 110mW, the power consumption of the receiver is less than 100mW, and the effective transmission distance is greater than 30m. According to the characteristics of neural signals, the sampling rate of 50kHz, the data transfer rate of 1Mbit / s. Transceiver circuit using printed circuit board (PCB) to achieve, work in 2.45GHz ISM band. The test results show that the module can well realize the telemetry function of neural signals.