摘要随着医学科技的快速发展，各种功能的电子医疗产品频繁的进入人们的生活。然 而在这些医疗电子产品中，一个亟待解决的问题就是如何将这些电子产品微型化、低 功耗化，以减轻植入人体时带来的疼痛。针对这些问题，本文就主要研究并设计一种 微型化、低功耗的迷走神经刺激器。主要设计内容包括:设计一个迷走神经刺激器电 路，电流脉冲频率在 1-40Hz、电流脉冲宽度在 130-1000以及脉冲幅度在 0-4mA 范 围内可调。83858

本文设计时，首先利用单片机产生两路频率和占空比均可调的 PWM 波，为了使其 幅度也可调，再利用镜像电流源设计一个脉冲发生器，两路 PWM 波经脉冲发生器合成 一个正负脉冲，达到在电触及点刺激迷走神经。在设计过程中，考虑到迷走神经刺激 器功耗低的特点，我们选取超低功耗微处理器 MCU，其芯片采用 TI 的 MSP430G2553， 这样可以避免神经刺激器因能量耗尽二次手术时带来的伤害。又考虑到设备的微型 化，在制作 PCB 电路板时元器件尽可能采用较小尺寸的贴片封装，将电路板的外形控 制在 5cm 以内。经过测试，可知我们设计的电路是可行的。

毕业论文关键词：神经刺激、功耗低、微型化

Abstract With the rapid development of medical science and technology, various functions of electronic medical products frequently enter people's lives。However, about these medical electronic products, a serious problem is how to miniaturize these electronic products and how to make the power consumption of these electronic products lower to relieve pain when they are implanted into the body。 To solve these problems, this paper mainly researches and designs a miniaturized, low power vagus nerve stimulator。 The  main content of the design include: design a vagus nerve stimulator circuit, current pulse frequency in  1-40Hz, the current  pulse width  in  the 130-1000 and pulse amplitude  in 0-4mA within the scope of adjustable。

About the design of this paper, first we use the microcontroller to generate a PWM wave whose both frequency and duty cycle can be adjusted。 And then in order to make the amplitude are adjustable, we use the current mirror to design a pulse generator。 Two PWM waves through the pulse generator synthesize a positive and negative pulse, reaching the point in the electrical stimulation of the vagus nerve。 During the design process, taking into account the vagus nerve stimulator’s low power consumption, we select ultralow power microprocessor MCU, whose chip uses TI's MSP430G2553, and this can avoid the injury brought by the second surgery because of the energy depletion of the nerve stimulator。 Also considering the miniaturization of the device, when make the PCB circuit board, components are expected to use as smaller-sized chip packages as possible to make the shape of the circuit board less than 5cm。 After testing, we find that the design of the circuit is feasible。

Keywords: Nerve stimulator；Nerve stimulator；Miniaturization

目 录

第一章 绪论 1

1。1  研究背景及目的 1

1。2  课题研究现状及发展趋势 2

1。2。1  研究现状 3

1。2。2  发展趋势分析 4

1。3  本文的主要内容 5

1。4  本章小结 5

第二章 迷走神经刺激器电路整体框架 6

2。1 基本思路 6

2。2  技术指标