基于Nose-to-Nose校准法的取样示波器冲激响应的一种算法  

A Method to Determine the Impulse Response of Sampling Oscilloscope Based on "Nose-to-Nose" Calibration

作　　者：赵华[1] 林茂六[2] 

机构地区：[1]南京邮电学院电子工程系,江苏南京210003 [2]哈尔滨工业大学电子通信工程系,黑龙江哈尔滨150001

出　　处：《电子学报》2003年第3期365-367,共3页Acta Electronica Sinica

基　　金：国家自然科学基金 (No 69872 0 1 1 )

摘　　要：本文根据时变电路概念和信号与电路系统理论 ,利用Nose to Nose(NTN)校正法 ,对取样示波器的双二极管平衡型取样电路建立了时变线性电路模型 ,导出了kick out脉冲和取样系统冲激响应的时域表达式 ,证明了该脉冲是NTN校正中的零输入响应而非冲激响应 ,提出了从kick out脉冲中提取时间常数从而确定取样器冲激响应的新的数据处理方法与公式 ,有效地解决了NTN校正中取样管结电容变化对校正精度的影响问题 .According to the time-varying circuit concept,signal and circuitry system theory,we establish a time-varying linear circuit model of two-diode sampler using Nose-To-Nose(NTN) calibration procedure in this paper,and derive expressions of kick-out pulse and the impulse response of the sampler in time domain,proving that kick-out pulse is a natural response of the sampling circuit in the NTN.A new data-processing method is presented to obtain the varying RC parameter from the kick-out pulses acquired for the determination of the impulse response of sampler of oscilloscope.The problem of diode junction capacitance effect on the NTN calibration can be solved.

关 键 词：Nose-to-Nose校正 取样 时变电路冲激响应 示波器 kick-out脉冲 

分 类 号：TM935.3[电气工程—电力电子与电力传动]