MSP430单片机射频能量供电的神经刺激器设计
摘要针对很多人体植入式设备经常需要二次手术更换电池这一弊端，本文给出射频能 量供电的神经刺激器设计。整体设计功耗低，有良好的可操作性，也是未来神经刺激 器发展的一大研究方向。
射频能量供电的神经刺激器，由射频能量收集电路和神经刺激器电路两部分构 成。射频能量收集电路包括天线接收模块和射频前端模块，在电路中应用铂电极作为 天线，与 LC 匹配网络构成天线收集模块；射频前端模块主要应用 8 级倍压整流网络 将收集到的能量进行多次倍压和累加，通过微变压器与直流稳压模块相连接，最终将 能量存储到存储器中，以备下级电路使用。神经刺激器电路首先利用 MSP430G2553 单片机产生两路 PWM 波形，实现 PWM 波的频率和占空比可调，然后再设计一个电 流值可以调节的电流源，把产生的两路 PWM 波加在设计的脉冲发生器电路，将两路 PWM 波合成正负脉冲，通过调节电流值来实现对 PWM 波幅值的调节。80313
本文完成了射频能量收集电路和神经刺激器电路的设计工作，完成 PCB 板的焊 接与调试，实现了电流脉冲幅度在 0-10mA 可调，频率在 0-1000Hz 以内，顺从电压 在 0-8V 之间，基本达到参数要求。
毕业论文关键词：神经刺激器；射频供电；射频能量收集；倍压整流
The neurostimulator powered by radio frequency energy harvesting is a major research direction in the future。It overcomes the disadvantage of human implantable devices that the battery needs to be replaced by surgery。The operation of this low-power design is simpleness。
The neurostimulator has two pisions,one is RF energy harvesting circuit and the other neurostimulator。RF energy harvesting circuit consisted of antenna receiving modules and RF front-end circuits。A platinum electrode is used as an antenna,which is connected with LC matching network that contributed to antenna collection module。RF front-end module mainly used level 8 times voltage double network to accumulate energy for several times,through the micro-transformer and the DC voltage stabilizing module,the RF energy will eventually stored in charging battery。The energy will support to the next circuit。Msp430g2553 generated two-way PWM waveform, this MCU has low power consumption,it can be used to control the frequency and duty cycle of PWM waveform,to make the PWM waveform adjustable。Then design a current source, which the current value can be adjusted,the PWM wave was applied to the design of pulse generator circuit,in this way to convert the two PWM wave synthesis into positive and negative pulses,by adjusting the value of current to achieve regulation of PWM amplitude values。
The paper accomplished the circuit design of neurostimulator powered by radio frequency energy harvesting ,welding and debugging of PCB board。Realized the current pulse amplitude can be adjusted in 0-10mA ,frequency within 0-1000Hz,compliance voltage between 0V and 8V, basically meet the requirements of the parameters。
Keywords: Neurostimulator; Radio frequency power supply; Radio frequency power collection；Voltage double
第一章 绪论-
1。1 研究背景及意义 1
1。1。1 研究背景 1
1。1。2 研究目的及意义 1
1。2 课题研究现状及发展趋势 2
1。2。2 发展趋势 4
1。3 论文结构 5
第二章 射频能量供电的神经刺激器总体框架 6
2。1 设计流程图