新型极零相消电路数学模型建立与实现

201510

CHINAMEASUREMENT&

Vol.41doi院10.11857/j.issn.1674-袁文献标志码院 文章编号院1674-5124渊2015冤10-0094-Establishmentandimplementationofnewpole-zerocancellationcircuitdigitalHONGXu1，LEIXiaobing2，ZHOUJianbin1，NI（1.CollegeofNuclearTechnologyandAutomationEngineeringChengduUniversityofTechnology，Chengdu610059China2.NuclearPowerInstituteofChinaChengdu610041,China）Abstract:Asitisdifficulttouseazerocreatedbypole-zerocancellation（PZC）circuittocancelaccuratelyapoleinchargesensitiveamplifier（CSA）outputsignalduetotheinherenterrorsofelectroniccomponentsandenvironmentalfactors，adigitalmodelforPZCcircuitwashencepresentedbasedonKirchhoffscurrentlaw（KCL）andnumericalanalysis.AcurrentequationaboutPZCcircuitwasestablishedwithKCLandanumericalanalysisalgorithmwasappliedtosolvethisequationtoobtainanewPZCcircuitdigitalmodel.Itwasimplementedinprogramlanguage.Simulationexperimentsandspectrumsmoothingtestswerecarriedoutaswell.Theexperimentalresultsshowthatthedigitalmodelcaneliminatetheundershootandreducetheinputsignalwidth.Keywords:pole-zerocancellation；numericalanalysis；Gaussianfilter；spectrum引基金项目院国家863计划项目（2012AA061800）

仪和放射性测井系统中。CSA输出脉冲信号的特点（pole-zerocancellation，PZC）CSA输出好的能量分辨率。PGrybos和Tseino等[2-6]利用PMOSPZC模拟电路，减小脉冲信号

CSA输出脉冲信号在CR成形过程中产生的下冲，s+

s+2

PZ//RCs+

s+f

s+2

f1= V（s）=Q·

s+Co2Co oo1Rf109以上，fCSA输出减小CSA输出脉冲信号发生堆积的概率，常采用CRC

CR成形电路、RC成形电路和低通高斯滤波电路[11]零2可建立如下电压传递公式：淄i-淄o+d（淄i-淄o）·C=淄 i-o+

（ 淄

图2极零相消电 2015年10x[n]y[n]驻t。整理式（7）得： ·（x[n]-y[n]）+x[n]-x[n-1]

21（ynyn1）=驻

1PCk2=驻（1k1）·xnxn1yn1（9）y[n]1+kx[ n逸

0-0

1 2

n臆 2

3CRCSA

11在MicrosoftExcel组件上编写具有极零相消功能的淄i=A·e-t CR成形电路的数学模型[8]

0- 1 1 2时间/渊10-9s4kkR0R=C=1嗓x[n]-x[n-1]+y[n-1]y[n]= 1+k嗓

n1n

mV=200sdt=50nFdt=50CRCR成形电路处理结

5为由PZC电路构成11 1 2时间/渊10-9s5合法中进行11点光滑时会丢掉10个测量数据。PZCRC（12）可知，PZC电路数学模型对谱数据的处理仅256241Am137Cs双源的302015000105 1281601922246通过推导PZC电路基于时域数值分析方法的数字算法，建立PZC电路数学模型；借助计算机仿

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