开关电流镜失配模型与仿真研究

系统仿真学报 ›› 2016, Vol. 28 ›› Issue (2): 383-387.

开关电流镜失配模型与仿真研究

郭杰荣^1,2, 何怡刚¹, 刘长青^1,2

1.合肥工业大学电气与自动化工程学院博士后流动站,安徽合肥 230009;
2.湖南文理学院物电学院光电信息集成与光学制造技术省级重点实验室,湖南常德 415000

收稿日期:2014-10-20 修回日期:2014-12-25 出版日期:2016-02-08 发布日期:2020-08-17
作者简介:郭杰荣(1973-),男,湖南汉寿,博士后,研究方向为模拟电路设计与测试。
基金资助:
国家杰出青年科学基金(50925727); 中国博士后科学基金(2013M541819); 教育部科学技术研究重大项目(313018)

Research on Switched Current Mirror Mismatch and Simulation

Guo Jierong^1,2, He Yigang¹, Liu Changqing^1,2

1. School of Electrical Engineering and Automation Postdoctoral Mobile Research Station, Hefei University of Technology, Hefei 230009, China;
2. Key Lab of Integrated with Optoelectronic Information and Optical Fabrication in Hunan, Changde 415000, China

Received:2014-10-20 Revised:2014-12-25 Online:2016-02-08 Published:2020-08-17

摘要/Abstract

摘要： 讨论了开关电流镜不匹配典型来源,基于开关电流电路采用宽长比定标设计的特性分析了最主要的3个失配参数：跨导、域值电压及亚阈值斜率。采用Hspice平台及0.18 um BSIM3_V3.1 SPICE模型给出了开发了用于仿真的电路模型,针对主要失配因素,分析提取了仿真模型参数并进行了分组。在弱反型和强反型2种运行规则条件下,对失配的情况进行了仿真和分析。对开关电流浮栅电流镜提供的失配补偿能力也进行了仿真验证,并给出2种运行规则失配补偿分析和模拟结果,对单一工作点和较宽动态范围条件下失配补偿效果也进行了对比。

关键词: 电流镜, 失配, 电流模技术, 弱反型, 强反型

Abstract: Typical sources of switched current mirror mismatch were discussed. The most important three parameter of mismatch: transconductance, threshold voltage and the sub threshold slope were analyzed, due to the switch current circuit adopts the width to length ratio characteristic for calibration design. SPICE model using Hspice platform and 0.18 um BSIM3_V3.1 were proposed for circuit simulation. The simulation and analysis of mismatch were executed based on two kinds of operating rules of weak inversion and strong inversion. The compensation ability for mismatch was provided by floating gate switch current mirror which was also verified by simulation. Analysis and simulation results of two kinds of operation rules were also given.

Key words: current mirror, mismatch, current model, weak inversion, strong inversion

中图分类号:

TN317

郭杰荣, 何怡刚, 刘长青. 开关电流镜失配模型与仿真研究[J]. 系统仿真学报, 2016, 28(2): 383-387.

Guo Jierong, He Yigang, Liu Changqing. Research on Switched Current Mirror Mismatch and Simulation[J]. Journal of System Simulation, 2016, 28(2): 383-387.

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