采样算法对ADC采集性能的影响分析  

The Influence of Sampling Algorithm on Adc Sampling

作　　者：闫昆 高浩 吕明钊[1] 孙爱中[1] Yan Kun;Gao Hao;Lv Mingzhao;Sun Aizhong(Xi’an Research Institute of Computing Techniques, AVIC, Xi’an Shaanxi,710065)

机构地区：[1]航空工业西安航空计算技术研究所,陕西西安710065

出　　处：《电子测试》2019年第8期57-58,104,共3页Electronic Test

摘　　要：在某计算机的测试验证中,部分模块的数模转换系统出现有效位数(简称ENOB)超差现象。通过分析和仿真验证确定为产品晶振频率在手册允许范围内产生较大偏移的条件下,由于使用了相干采样算法计算ENOB值,导致ENOB测试值降低。通过选用非相干采样算法,解决了有效位数测试超差问题。Abstract :In the testing of some kinds of computers,some module’s ADC circuit appear that the enobdata is out of criteria. Through analysis and simulating,it is found that the using of coherent sampling algorithm to calculate the ENOB value leads to the decrease of EONB value ,on the condition of large offset of frequence of the cystal oscillator within the allowable range of the manual. This problem is effectively solved by using incoherent sampling algorithm.

关 键 词：ADC采集电路 频率偏差 采样算法 

分 类 号：TN792[电子电信—电路与系统]