基于arm的简易手持示波器示波器.docVIP

基于ARM的简易手持示波器的设计 摘 要 本设计是基于ARM(Advance RISC Machine)以ARM9[2]为控制核心简易手持示波器的设计。包括前级电路处理，AD转换，波形处理，LCD显示灯模块。前级电路处理包括程控放大衰减器，极性转换电路，过零比较器组成，AD的转换速率最高为500KSPS，采用实时采样方式，设计中采用模块设计方法。充分使用了Proteus Multisim仿真工具，大大提高了设计效率，可测量输入频率范围为10HZ—60KHZ的波形，测量幅度范围为-3.3V—+3.3V,并实现波形的放大和缩小，实时显示输入信号波形，同时测量波形输入信号的频率。 总体来看，本文所设计的示波器，体积小，价格低廉，低功耗，方便携带，适用范围广泛，基本上满足了某些场合的需要，同时克服了传统示波器体积庞大的缺点，减小成本，完全可以把本设计当做手持数字示波器[1]。 关键词：AD ，ARM，实时采样，手持数字示波器 A Design of Simple Handheld Oscilloscope Based On Arm ABSTRACT The design is based on the ARM ( Advanced RISC Machine) with ARM9[2] as the control core of simple handheld oscilloscope design .Includes a front stage circuit ,AD conversion ,waveform processing ,LCD display lamp module ,The front stage circuit processing includes programmable amplifier and attenuator, a polarity conversion circuit , a zero cross comparator , AD conversion rate up to 500KSPS, real-time sampling, design adopts module design method , Make full use of the Proteus, Multisim simulation tools ,greatly improving the efficiency of the design ,can measure for input frequency range of 10HZ-60KHZ waveform ,amplitude measurement range of -3.3v-+3.3v,and the realization of waveform amplification and narrow, real-time display of the input signal waveform ,while measuring the wave shape of the frequency of the input signal. Overall, the oscilloscope designed, small volume, low price, low power consumption ,convenient carrying ,wide application scope ,basically meet the needs of certain applications ,while overcoming the traditional oscilloscope bulky shortcomings, reduce cost , can make the design as a hand-held digital oscilloscope[14] KEY WORDS: AD, ARM, real-time sampling, handheld digital Oscilloscope 目　录 前　言 1 第1章 绪论 2 1.1课题背景 2 1.2课题研究的目的和意义 2 1.3课题的主要研究工作 3 第2章 系统整体设计方案 5 2.1硬件总体结构 5 2.2系统实现的原理介绍 6 2.2.1实时采样 6 2.2.2 AD转换器介绍 7 2.2.3 ARM处理器介绍 8 2.2.4 LCD显示部分 8 2.3软件整体设计 10 2.4数字手持示波器技术参数 10 2.5本章小结 10 第3章 硬件结构 11 3.1程控放大模块设计 11 3.1.1程控放大电路的作用 11 3.1.2 程控放大器电路所用芯片 11 3.1.3 AD603放大电路