基于Z域变换的CCM电荷传输模型研究  

Research on Model of Charge Delivering in CCM Based on Z Transform

作　　者：何伟基[1] 陈钱[1] 徐融[1] 寇松峰[1] 

机构地区：[1]南京理工大学电子信息工程与光电技术学院,江苏南京210094

出　　处：《电子学报》2008年第6期1140-1143,共4页Acta Electronica Sinica

基　　金：国防基础科研项目(No.A2620060242);武器装备预先研究项目(No.4040508011)

摘　　要：分析了EMCCD的结构特征及载流子倍增寄存器利用碰撞电离实现电荷倍增的原理,建立了一种基于离散系统Z域变换的CCM电荷传输模型.该模型描述了在CCM电荷传输的电荷转移损失和电荷倍增过程.利用该模型的电荷传输的传递函数,本文推导了CCM电荷传输幅频响应的计算表达式并结合CCM的典型参数进行了数值计算.计算结果与实验观察表明随着电荷倍增率越大,CCM电荷传输的幅频响应改善越明显.A model describes both of charge lose and charge multiplication when charge delivering in CCM based on Z transform , which relates to the architecture of EMCCD and the theory of CCM that using impact ionization to multiply photo-generated charge was proposed here.From transfer function of charge delivering in CCM, the amplitude-frequency response was obtained as well as its numerical values with the typical parameters of a CCM. Numerical values and experimental results show that the higher the charge multiplication ratio in CCM, the better improvement the amplitude-frequency response of CCM gets.

关 键 词：Z域变换 CCM 电荷倍增 幅频响应 

分 类 号：TN223[电子电信—物理电子学]