电阻、电容和电感测量仪的VHDL设计介绍.doc

 PAGE \* MERGEFORMAT  摘 要 在计算机技术的推动下，20世纪末，电子技术得到了飞速的成长。EDA（Electronic Design Automation）技术作为现代电子技术的核心，可以应用在各个领域之中。而传统的测量仪已经不能满足现代测量的需求，所以我们需要在技术上进一步发展。 课题是利用VHDL设计一个数字显示的电阻、电容和电感测量仪，其中包括软件与硬件设计。硬件电路设计就是电阻、电容、电感三个测量电路加上一个测试电路和一个数码显示电路。课题主要的设计内容是VHDL的软件设计部分，其中包括顶层模块设计以及计频模块、选择模块、数据转换译码显示模块的设计及其程序编写，然后又包含了计频、选择、数据转换译码显示模块中各个小模块的设计，最后再对各个小模块分别进行仿真测试，得到仿真波形，验证设计的完成情况。 课题实现了选择测量功能，可以对电阻、电容、电感参??分别进行测量，并在数码显示器上实时显示，测量精度在百分之五以内。通过对软件程序的设计以及硬件电路的设计，最终实现毕业设计的目的要求。 关键词：EDA；VHDL；电阻测量；电容测量；电感测量  PAGE \* MERGEFORMAT I ABSTRACT Driven by computer technology, electronic technology has developed rapidly at the end of the twentieth Century. EDA (Electronic Design Automation) technology as the core of modern electronic technology can be applied in various fields. The traditional measuring instrument can not meet the needs of modern measurement. So we need development in technology. The subject is to design a digital display of the resistance, capacitance and inductance measuring instrumentuse by use VHDL.It included software and hardware design.Hardware circuit design is consist of a test circuit,a digital display circuit and measuring circuit of the resistance, capacitance, inductance.The subject design content is the software design of VHDL which includes the top-level module design and frequency module, selection module, data conversion and decoding module design and programming.Then it contains the design of frequency, selection, data conversion decoding display module in the design of each small module.Finally, the simulation test is carried out for each small module, simulation waveforms are obtained,verify the completion of the design. The subject realizes choice of measurement function.It can be measurement of resistance, capacitance and inductance parameters and real time display on the digital display.Measurement accuracy is less than five percent. Through the design of the software program and the design of the hardware circuit, finally achieve t