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电子学报 ›› 2014, Vol. 42 ›› Issue (5): 1030-1034.DOI: 10.3969/j.issn.0372-2112.2014.05.032

• 科研通信 • 上一篇    下一篇

基于电阻电流镜的低压灵敏放大器设计

郭家荣, 冉峰, 徐美华   

  1. 上海大学机电工程与自动化学院,上海 200072
  • 收稿日期:2010-01-23 修回日期:2011-12-03 出版日期:2014-05-25
    • 作者简介:
    • 郭家荣 女， 1980年生于安徽淮北.上海大学微电子中心博士.研究方向为半导体存储器. E-mail:jrguo@shu.edu.cn冉 峰 男，1958年生于上海.博士生导师,研究方向为微电子与集成电路设计、高清晰度平板显示与应用集成技术.
    • 基金资助:
    • 上海市经济和信息化委员会“上海市引进技术的吸收与创新年度计划” (No.11XI-15)

A Low-Voltage Sense Amplifier Based on Resistor Mirror

GUO Jia-rong, RAN Feng, XU Mei-hua   

  1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, 200072, China
  • Received:2010-01-23 Revised:2011-12-03 Online:2014-05-25 Published:2014-05-25
    • Supported by:
    • Municipality Commission of Economy and Informatization Annual Plan of Absorption and Innovation of Introduced Technology of Shanghai (No.11XI-15)

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摘要： 提出一种适用于低压快闪存储器的电流模式的低压灵敏放大器.该灵敏放大器在基准电流产生电路中使用电阻电流镜代替传统的晶体管电流镜，使得基准电流产生电路的工作电压减少了一个阈值电压，从而降低灵敏放大器的工作电压.位线电压控制电路中运算放大器的使用减少了由于温度和工艺变化所引起的位线电压变化，进而提高读取操作的精度.采用中芯国际90nm工艺设计，提出的灵敏放大器在1.2V电源电压时的读取时间是14.7ns，相对于传统的结构，单个灵敏放大器的功耗被优化了13%.

关键词: 灵敏放大器, 电流模式, 低压, 快闪存储器

Abstract: A new low-voltage and high speed sense amplifier based on very simple direct current-mode comparison is presented.It adopts low-voltage reference cell current generator implemented through using resistor mirror instead of traditional transistor mirror to avoid threshold voltage drop of the transistor mirror thus reducing voltage supply of sense amplifier.The use of operation amplifier in control circuit of bit-line voltage reduces voltage variation due to the variation of temperature and process corner,thus enhancing access precision.The proposed sense amplifier is designed in SMIC (Semiconductor Manufacturing International Corporation) 90nm process and the sense time is 14.7ns at power supply of 1.2V.Meanwhile,the current power of single sense amplifier is optimized by 13% over conventional structure.

Key words: sense amplifier, current-mode, low-voltage, flash memory

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