电子学报 ›› 2019, Vol. 47 ›› Issue (7): 1518-1524.DOI: 10.3969/j.issn.0372-2112.2019.07.016

• 学术论文 • 上一篇    下一篇

一种无需SDAC的新型流水线ADC架构——桥电位式流水线ADC架构

陈启星1, 罗启宇2   

  1. 1. 湖南城建职业技术学院长沙校区机电系, 湖南长沙 410015;
    2. 中国电子进出口总公司, 北京 100036
  • 收稿日期:2018-05-28 修回日期:2019-04-06 出版日期:2019-07-25 发布日期:2019-07-25
  • 作者简介:陈启星 男,1956年6月出生,长沙人,任教于湖南城建职业技术学院长沙校区机电系,副教授.和罗启宇合作研究ADC/DAC已18年,其多个创新架构已获得中国、美国、日本发明专利权.在多种核心刊物上发表论文十余篇.E-mail:chenqixingas@126.com;罗启宇 男,1954年10月出生,长沙人,就职于中国电子进出口总公司,高级工程师.E-mail:luo5536@qq.com

A New Pipeline ADC Architecture Without SDAC——Bridge-Potential Type Pipeline ADC Architecture

CHEN Qi-xing1, LUO Qi-yu2   

  1. 1. Mechinery & Electrical Department, Hunan Urban Construction College, Changsha, Hunan 410015, China;
    2. China National Electronics Import & Export Corporation, Beijing 100036, China
  • Received:2018-05-28 Revised:2019-04-06 Online:2019-07-25 Published:2019-07-25

摘要: ADC/DAC是计算机技术的重要组成部分之一.本文提出的桥电位架构ADC,类似于流水线ADC,也是由多个StageADC采用流水线方式构成.文中提出了两个创新点:一是桥电位架构,在某个瞬间,基准电位链中必有一个基准电位既对应着模拟输入信号,又对应着数字输出信号,称桥电位,相对于流水线ADC而言,桥电位ADC中的基准电位链扩展了一项功能:将基准电位链中的桥电位直接取出与模拟输入信号相减就等于尾数电压,无需SDAC;二是翻转点ON式零损开关链,由此构成桥电位提取模块,使得桥电位只需流经仅仅一个零损开关即可被取出.这两项改进使得每个StageADC都只包含了SADC,而SDAC被摒弃.

关键词: ADC架构, 桥电位, 翻转点, 零损开关, 流水线ADC, SDAC, 基准电位, 子级ADC

Abstract: ADC/DAC is one of important parts of computer technology.The bridge-potential architecture ADC,similar to the pipeline ADC,is also formed by multiple pipelined type of stageADCs.This paper presents two innovative points:1.Bridge-potential architecture.At certain moment,there must be a reference potential in the reference potential chain that corresponds to both a digital output signal and an analog input signal,and this reference potential is called the bridge-potential.Compared to the pipeline ADC,the reference potential chain in the bridge-potential ADC extended a function by extracting the bridge-potential from the reference potential chain directly and subtracting it from the analog input signal,which is equal to the residue voltage and does not need a SDAC.2.Turning-point ON type zero-loss switch chain.Thus,the bridge potential extraction module is constructed,which enables the bridge-potential to go by only one zero-loss switch to be extracted.With these two improvements,each StageADC is enabled to contain SADC only,while SDAC is discarded.

Key words: ADC architecture, bridge-potential, turning-point, zero-loss switch, pipeline ADC, SDAC, reference potential, stageADC

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