一种用于ADC测试的自适应斜率调整斜坡发生器  

A Self Adaptive Slope Adjustment Ramp Generator Applying in ADC Test System

作　　者：李晓晨[1] 李斌桥[1] 姚素英[1] 张娜[1] 

机构地区：[1]天津大学专用集成电路设计中心,天津300072

出　　处：《光电子．激光》2007年第3期281-284,共4页Journal of Optoelectronics·Laser

基　　金：国家自然基金资助项目(60576025);天津市科技发展计划攻关资助项目(033183911)

摘　　要：介绍了一种用于模数转换器(ADC)测试的、可以进行斜率自适应调整的斜坡发生器,在基本斜坡发生器原理的基础上,通过斜率自适应调整机制,在满足斜坡信号线性度的同时,保证了斜坡的斜率具有较高的精度,克服了基本斜坡发生器对于斜坡斜率控制不够精确的弊病,将斜坡斜率的精度提高到1.5%,而功耗却不超过10mW,并可以根据实际需要对斜坡信号的斜率及幅度进行调整,从而实现从μs到s级的任意幅度斜坡信号的产生。In this paper, a novel ramp signal generator with automatic slope adjustment is presented, which can be use for onchip testing of high resolution AD converter circuit. This configuration which is based on the principle of the basic ramp generator,introducing slope adaptive scheme,ensures the ramp slope precision but doesn＇t destroy the linearity of the ramp signal,so it overcomes the disadvantage of the basic ramp generator. This design develops the accuracy of the ramp to 1.5%, but dissipates less than 10 mW. In addition,this structure also can alter the ramp slope and the amplitude according to different application situation so to achieve any ramp signal generating in the time scope between μs and s.

关 键 词：斜坡发生器 斜率 线性度 自适应机制 共源共栅电流镜 

分 类 号：TN782[电子电信—电路与系统]