正弦信号发生器波形抖动的一种精确测量方法  

A Precision Measuring Method of the Jitter of Sine Wave Generators

作　　者：梁志国[1] 孙璟宇[1] 盛晓岩[1] 

机构地区：[1]长城计量测试技术研究所,北京100095

出　　处：《仪器仪表学报》2004年第1期23-29,共7页Chinese Journal of Scientific Instrument

摘　　要：介绍了一种用三参数正弦波拟合算法实现的、绝对收敛的四参数最小二乘正弦波拟合算法 ,给出了收敛区间、绝对收敛判据以及实现过程。在此基础上讨论实现了正弦信号发生器波形抖动的评价问题。使用一个周期的正弦波曲线模型的滑动拟合法 ,评价了幅度、频率、直流偏移的抖动 ,以及相位与理论值之偏差的抖动情况。在幅度、频率、相位和直流偏移分别存在固定抖动的情况下 ,仿真评价了四个正弦参数各自的抖动情况 ,同时 ,在一个实测正弦波形曲线上进行的抖动分析 ,获得了非常明确的抖动测量结果。本方法评价正弦波信号抖动时 ,准确度高、分辨力好 ,且指标全面。A four-parameter sine wave curve-fit method is introduced, it based on the three-parameter sine wave curve-fit method, and it's an absolute convergent course. The absolute convergent interval, the absolute convergence criterion and the actualization course are presented. Then, the evaluation of jitter of sine wave generator is discussed and achieved. By using moving one period sine wave model, the jitters of amplitude, frequency, phase, and offset of sine wave are evaluated. In the situation, each of the amplitude, frequency, phase and offset deterministic jitters is presented alone, each course of jitter evaluation is imitated. At the same time, One group of experimental results are given out, the definite and clear jitter results are attained. The measuring method above is excellent in evaluating the jitters of sine wave model parameters of generators. By using this method, one can obtain the jitter parameter at high precision, full parameters, and good resolution.

关 键 词：正弦信号发生器 波形抖动 曲线拟合 数字化波形测量仪器 波形参数 精确测量方法 信号分析 

分 类 号：TM935.2[电气工程—电力电子与电力传动]