【作者】 王利；

【导师】 蒋国平；

【作者基本信息】 大连理工大学 ， 测试计量技术及仪器， 2005， 硕士

【摘要】 本文较为全面地概括介绍了数/模转换器的国内外动态,分析了数/模转换器的基本原理和结构,对电流转换和电压转换的数/模转换器进行了详细的分析。通过对温度码和二进制码这两种不同数/模转换器结构的讨论,针对速度、精度和成本的要求,设计了一种新型的分段温度码二进制加权控制的电流源型数/模转换器,并对其进行了原理分析和电路设计、电路仿真、电路版图布局、部分电路版图实现等的研究。建立了完整的电流源型数/模转换器基本单元电路设计。 采用文章中的转换结构和基本单元电路,使得数/模转换器的转换速率达到1M,其转换精度为11位(数/模转换器的实际有效位是10位),电路面积不到0.17mm~2。而且电路的积分非线性非常小,不到0.5%,差分非线性不到0.5LSB。在转换速度和精度不变的前提下,分段式温度编码二进制加权控制的电流源型数/模转换器的结构可以明显的减小电路的面积。 文章中讨论了有关数/模转换器的一些基本设计思想和手段。针对2+2+2+5分段式温度编码二进制加权控制的电流源型数/模转换器设计常见问题,进行了理论上的分析,并给出了实际的电流源阵列结构、开关阵列结构、电流基准、参考电压电流、输出缓冲电路,数字控制逻辑等单元电路的设计方案及具体电路。更多还原

【Abstract】 This paper present a general introduction on Digital-Analog Convener study of domestic and aboard, analysis of D / A converter principle and structure, and the analysis of different converting type such as current converting and Voltage converting.Based on the study of binary weighted D / A converter and thermometer-coded D / Aconverter, a new Segmented thermometer-coded to be weighted with binary current source D/ A convener is presented according to sample rate , precision and area of circuit. The paperstudy its principle and design its cell circuits, simulate each, place them on layout as well aslay out a part of circuits.This converter has thermometer-coded to be binary weighted 2+2+2+5 architecture, the architecture implements the 11 bit D / A converter and achieve a speed of 1M /sps, INL less than 5%, DNL less than 0.5 LSB, and area is less than 0.17mm2. this D / A convener can reduce circuit area under the same rate and precision obviously.Some of the basic design theory and technology are presented within this paper. The basic cell architectures implemented in D / A converter are also presented. To improve this D / A converter, some of the cell architectures, including current source array, switch array, benchmark current, reference voltage and current, output buffer, digital control cells, have to be designed carefully. The details of these cells are described in this paper.更多还原