原子能科学技术2021，Vol.55Issue(12)：2237-2250,14.DOI:10.7538/yzk.2021.youxian.0565
基于3D Si PIN阵列热中子探测器的变增益宽动态前端读出电子学设计
Design on Front-end Readout ASIC with Variable Gain and Wide Dynamic Range for 3D Si PIN Array Thermal Neutron Detector
摘要
Abstract
The front-end readout ASIC based on Si CMOS technology is primarily designed according to the output signal characteristics of the 3D Si PIN array thermal neutron detector.The key circuit modules of the designed readout ASIC include the charge sensitive amplifier (CSA),the analog switch design,an automatic gain control module (AGC) with three-level charge sensitivity automatic switching,the correlation dual sampling (CDS) and reference current source circuit.The simulation results show that the input dynamic range of the front-end circuit is 10 fC-8.0 pC.The three gain coefficients of the designed ASIC according to the thermal neutron detector output signal characteristics are set as 1.9 V/pC,0.39 V/pC and 94 mV/pC,respectively.The inte-gral nonlinearity of the designed ASIC is less than 1％.The single channel static power consumption is about 5.36 mW.The equivalent noise charge at zero input detector capacitance is 241.6e-.The counting rate can arrive to the level of 1 MHz.关键词
前端读出电路/宽动态范围/电荷灵敏前置放大器Key words
front-end readout circuit/wide dynamic range/charge sensitive preamplifier分类
能源科技引用本文复制引用
韩宁,陈伟,李龙,刘新赞,刘书焕,马勇,熊艳丽,李炳均,张国和,Carlo Ettore Fiorini..基于3D Si PIN阵列热中子探测器的变增益宽动态前端读出电子学设计[J].原子能科学技术,2021,55(12):2237-2250,14.基金项目
Supported by National Natural Science Foundation of China (12075180,11175139) （12075180,11175139）
