适用于任意多进制的DAC通用结构  

General Structure of DAC Suitable for Arbitrary Radix

作　　者：刘超 陶敏 宿刚 李德辉[1] 郑伟[1] 石景龙[1] LIU Chao;TAO Min;SU Gang;LI Dehui;ZHENG Wei;SHI Jinglong(College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2022年第4期546-552,共7页Journal of Jilin University（Information Science Edition）

基　　金：国家重点研发计划基金资助项目(2016YFE0200700)。

摘　　要：为使数字模拟转换器(DAC:Digital-to-Analog Converter)实现更高的分辨率,提出了一种可实现多进制数字输入的电压输出型DAC通用结构。该DAC通用结构主要由电阻网络、单刀多掷模拟开关、参考电压源和缓冲放大器组成。在提出的电路结构的基础上,采用分立元件和集成电路芯片设计了一个8位的三进制DAC电路模块,并对测试数据进行了误差分析。经理论分析,该8位三进制DAC相比于传统的8位DAC,在不明显提高结构复杂性的情况下,分辨率提高25.6倍,且该DAC结构还具有结构简单、进制拓展性和位数拓展性强的特点。In order to achieve higher DAC(Digital-to-Analog Converter)resolution,a general structure of voltage output DAC which is suitable for arbitrary radix is proposed.The general structure of the DAC mainly includes a resistor network,a set of single-pole multi-throw analog switches,a set of reference voltage sources and a buffer amplifier.On the basis of the proposed circuit structure,an 8-trit ternary DAC circuit module is designed using discrete components and integrated circuit chips,and the test data is analyzed for errors.After theoretical analysis,compared with the traditional DAC,the 8-trit ternary DAC has a resolution increase of 25.6 times without significantly increasing the complexity of the structure.And the DAC structure also has the characteristics of simple structure and strong expansibility on radix and number of digits.

关 键 词：数模转换器 分辨率 电阻网络 任意多进制 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]