学士学位论文___数字直流电压表系统设计.doc

摘 要 进入21 世纪以来，科学技术的发展已难以用日新月异来描述。新工艺、新材料、新的制造技术催生了新的一代电子元器件，同时也促使电子测量技术和电子测量仪器产生了新概念和新发展趋势。优异电压测量是电子测量中的基本内容电压表是测量仪器中不可缺少的设备目前广泛应用的是采用专用集成电路实现的数字电压表ATMEL公司的AT89C52实现数字直流电压表系统的设计，其主要具有如下功能： 测量0-5V的直流电压，最小分辨率为0.02V，使用8段LED数码管模块稳定显示所测量的电压。 本以AT89C5单片机为核心，以逐次逼近式A/D转换器ADC0808，设计了数字电压表电压测量单片机AT89C52 ADC0808 LED数码管 Abstract Into the 21st century, scientific and technological development has been difficult to describe with each passing day. New technology, new materials, new manufacturing technology spawned a new generation of electronic components, but also to promote electronic measurement and electronic measuring instruments produced new concepts and new trends. The development of electronic measuring instruments growing trend of excellent voltage measurements are the basic elements of electronic measurement, measuring instruments, therefore voltmeter is an indispensable device. Is now widely used by ASIC to achieve the digital voltage meter, with the development of electronic technology, more and more precise measurement requirements, measurement tools, performance requirements have become more sophisticated. Digital voltmeter has been achieved measurement automation, improve efficiency indispensable instruments, digital measuring equipment is currently one of the main direction of development. Digital can not develop without the application of SCM, SCM is an integrated circuit chip, using technology to large scale data processing with a microprocessor (CPU) concentrated in a single chip. With the rapid development of single chip microcomputer, microcontroller technology has become a national important indicator of the level of modern technology. SCM can be individually required to complete the modern industrial control intelligent control, which is the biggest single chip features. Microcomputer control system can replace the previous use of complex electronic circuits or digital circuits of the control system software control can be achieved and can achieve