计量学报Issue(4)：335-338,4.DOI:10.3969/j.issn.1000-1158.2014.04.07
噪声温度计中新型数字相关器设计
A New Design of Digital Correlator for Johnson Noise Thermometry
摘要
Abstract
The basic principles and characteristics of cross-correlators used in Johnson noise thermometry are described . A new digital correlator is presented based on commercial analog-to-digital converters and LabVIEW software for the measurement of the thermal noise. High-precision synchronous dual-channel-sampling has been achieved by adjusting the phases of the external reference clocks. Experiments are carried out to validate the proposed approach and the results show that the new correlator is able to detect extremely small signals buried in the noise of the measurement circuits.关键词
计量学/噪声温度计/互相关/数字相关器Key words
Metrology/Johnson Noise Thermometry/Cross-correlation/Digital correlators分类
通用工业技术引用本文复制引用
付云丰,屈继峰,张建强,周琨荔..噪声温度计中新型数字相关器设计[J].计量学报,2014,(4):335-338,4.基金项目
国家自然科学基金（61001034）；公益性行业科研专项 （）
