作者：洪旭¹, 雷小兵², 周建斌¹, 倪师军¹

作者单位：1. 成都理工大学核技术与自动化工程学院, 四川 成都 610059;
2. 中国核动力研究设计院, 四川 成都 610041

关键词：极零相消;数值分析;高斯滤波器;谱线平滑

摘要：

由于电子器件固有误差和环境因素的影响,模拟极零相消电路的电路零点不能与电荷灵敏前置放大器输出信号极点准确相消,针对此问题,提出一种新型极零相消电路数学模型。根据基尔霍夫电流定律建立极零相消电路电流等式,利用时域数值分析方法推导其递推解,最终建立一种新型极零相消电路数学模型。通过编程语言实现该数学模型的仿真,并应用于实测谱线的光滑处理。结果表明:该模型能有效减小输入脉冲信号宽度,并消除CR成形过程产生的下冲,达到实际极零相消电路对核信号的处理效果。

Establishment and implementation of new pole-zero cancellation circuit digital model

HONG Xu¹, LEI Xiaobing², ZHOU Jianbin¹, NI Shijun¹

1. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China;
2. Nuclear Power Institute of China, Chengdu 610041, China

Abstract: As it is difficult to use a zero created by pole-zero cancellation (PZC) circuit to cancel accurately a pole in charge sensitive amplifier (CSA) output signal due to the inherent errors of electronic components and environmental factors, a digital model for PZC circuit was hence presented based on Kirchhoff's current law (KCL) and numerical analysis. A current equation about PZC circuit was established with KCL and a numerical analysis algorithm was applied to solve this equation to obtain a new PZC circuit digital model. It was implemented in program language. Simulation experiments and spectrum smoothing tests were carried out as well. The experimental results show that the digital model can eliminate the undershoot and reduce the input signal width.

Keywords: pole-zero cancellation;numerical analysis;Gaussian filter;spectrum smoothing

2015, 41(10): 94-97  收稿日期: 2014-12-22;收到修改稿日期: 2015-01-16

基金项目: 国家863计划项目(2012AA061800)

作者简介: 洪旭(1989-),男,重庆市人,博士研究生,专业方向为智能仪器。

参考文献

[1] 王经瑾,范天民,钱永庚,等. 核电子学[M]. 北京:原子能出版社,1983:104-105.
[2] Grybos P, Idzik M, Swientek K. Integrated charge sensitive amplifier with Pole-Zero cancellation circuit for high rates[C]//Proceedings-IEEE International Symposium on Circuits and Systems,2006:1997-2000.
[3] Grybos P. Pole-zero cancellation circuit for charge sensitive amplifier with Pile-up pulses tracking system[C]//IEEE Nuclear Science Symposium Conference Record,2007:226-230.
[4] Grybos P, Maj P, Szczygiel R. Comparison of two Pole-zero cancellation circuit for fast charge sensitive amplifier in CMOS technology[C]//Proceedings of the 14th International Conference “Mixed Design of Integrated Circuits and Systems”,2007:243-246.
[5] Grybos P, Szczygiel R. Pole-zero cancellation circuit with pulse Pile-up tracking system for low noise Charge-sensitive amplifiers[J]. IEEE Transactions on Nuclear Science,2008,55(1):583-590.
[6] Seino T, Takahashi I, Ishitsu T, et al. An alternative pulse height correction method for Pole-zero cancellation circuitry[J]. Nuclear Instruments and Methods in Physics Research,2012(675):133-138.
[7] 梁卫平,胡颖睿,肖无云,等. 数字化多道脉冲幅度分析器调理电路设计[J]. 核电子学与探测技术,2012,32(4):462-465.
[8] 张志勇,曾卫华,周舜铭,等. 核能谱放大器脉冲成形电路的设计[J]. 核电子学与探测技术,2011,31(11):1300-1302.
[9] 祁中,李东仓,杨磊,等. 基于低通S-K滤波器的核脉冲成形电路[J]. 兰州大学学报:自然科学板,2008,44(5):137-140.
[10] 王芝英,楼滨乔,朱俊杰,等. 核电子技术原理[M]. 北京:原子能出版社,1989:84-85.
[11] Zhou J B, Zhou W, Lei J R, et al. Study of time-domain digital pulse shaping algorithms for nuclear signals[J]. Nuclear Science And Techniques,2012,23(3):150-155.
[12] Noulis T, Deradonis C, Siskos S, et al. Particle detector tunable monolithic Semi-Gaussian shaping filter based on transconductance amplifiers[J]. Nuclear Instruments and Methods in Physics Research,2008(589):330-337.
[13] Nakhostin M. Recursive algorithms for real-time digital CR-(RC)ⁿ pulse shaping[J]. IEEE Transactions on Nuclear Science,2011,58(5):2378-2381.