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一种用于ADC电路的高速高精度比较器设计
引用本文:吴光林,吴建辉,杨军,饶进,罗春.一种用于ADC电路的高速高精度比较器设计[J].应用科学学报,2005,23(6):591-594.
作者姓名:吴光林  吴建辉  杨军  饶进  罗春
作者单位:东南大学国家专用集成电路系统工程技术研究中心, 江苏南京 210096
基金项目:国家自然科学基金资助项目(60176018)
摘    要:在分析各种比较器设计失调消除技术基础上,提出了一种用于ADC电路的高速高精度比较器设计技术和失调消除技术.该比较器由主动复位和被动箝位的预放大器和输出锁存器构成,具有失调自动校准功能.仿真结果表明,在Chartered 0.35 μm COMS工艺下,电源电压3.3 V,调整后的比较器失调误差为56.8 μV,比较器的精度0.1mV,比较速率100 MHz.

关 键 词:A  D转换器  比较器  失调消除技术  放大器  
文章编号:0255-8297(2005)06-0591-04
收稿时间:2004-07-15
修稿时间:2004-07-152004-09-10

High-Speed High-Resolution Comparator for Design of ADC
WU Guang-lin,WU Jian-hui,YANG Jun,RAO Jin,LUO Chun.High-Speed High-Resolution Comparator for Design of ADC[J].Journal of Applied Sciences,2005,23(6):591-594.
Authors:WU Guang-lin  WU Jian-hui  YANG Jun  RAO Jin  LUO Chun
Institution:National ASIC System Engineering Research Center, Southeast University, Nanjing 210096, China
Abstract:In this paper, various offset-canceling techniques in comparators are reviewed, and high-speed high-resolution comparator design techniques and a new offset canceling technique are then described.The comparator includes three preamplifiers, an output latch and offset canceling circuit.Experimental results show that, after offset adjusting of the comparator, an offset error of about 56.8 μV is achieved, and it is able to resolve 0.1 mv at a comparison rate of 100 MHz under the condition of a single +3.3 supply using Chartered 0.35 μm CMOS technology.
Keywords:A/D converter  comparator  offset canceling  amplifier
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