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。
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.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2016年第2期383-387,共5页
Journal of System Simulation
基金
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)
关键词
电流镜
失配
电流模技术
弱反型
强反型
current mirror
mismatch
current model
weak inversion
strong inversion
