基于7107的数字电压表的设计.doc

摘 要 数字电压表是采用数字化测量设计的电压仪表，数字仪表的发展趋势采用新技术、新工艺。由LSI和VLSI构成的新型数字仪表及高档智能仪器的大量问世，标志着电子仪器领域的一场革新，也开创了现代电子测量技术的先河。 目前，数字电压表作为数字化仪表的基础和核心，已被广泛应用于电子和电工测量、工业自动化仪表、自动测试系统等领域，显示出强大的生命力。与此同时，数字电压表扩展而成的各种通用及专用仪器仪表，也将电量及非电量测量技术提高到新水平。近年来，国内许多厂家通过积极引进、吸收国外先进技术，努力赶上世界水平，现已能够大批量生产多种高、精、尖的数字电压表仪器。 本文介绍的是ICL7107A/D转换器的数字电压表设计方法。A/D转换器是数字电压表的核心部件，A/D转换器的性能特点、转换方式在很大程度上决定了数字电压表的性能和特点。 关键词： ICL7107 数字电压表 A/D转换器 ABSTRACT Digital voltage meter is designed with digital voltage meter measurement. Digital meter new technology trends．The new technology, LSI and VLSI posed by the new digital instrumentation and high-end smart devices in large numbers, marks an innovation in the field of electronic devices, has created a precedent for modern electronic measuring technology. Currently, digital voltage meter digital meter as the basis and the core, has been widely used in electronic and electrical measurements, industrial automation, instrumentation, automatic test systems in the field, showing great vitality. Killing me with this, digital voltage meter extension to the various general and special instrumentation, will power and non-power measurement up to a new level. In recent years, many domestic manufacturers through the active introduction of foreign advanced technology, striving to achieve world standards, is now able to mass production of a variety of high precision and advanced digital voltage. This article describes the ICL7107 A / D conversion of the digital voltmeter design. A / D converter is the core component of a digital voltmeter. A / D converter performance characteristics, the conversion method to a large extent, determine the meters performance and characteristics. Keywords： ICL7107 digital voltage meter A/D converter 第一章 绪论 1 1.1 课题背景 1 1.2 研究的目的及意义 1 第二章 硬件设计及电路图 3 2.1 设计任务 3 2.2 原理图 3 2.3 设计方案论证 3 第三章 数字电压表电路系统设计 5 3.1 A/D转换模块的设计 5 3.1.1 ICL7107A/D转换器简介 5 3.1.2 ICL7107A/D转换器外围电路设计 8 3.1.3 ICL7107的工作原理 9 3.2 数码管简介 12 第四章 实物制作及说明 17 4.1 电路装配 17 4.