精密阻抗分析仪中数字相敏检波技术研究与实现  

Research and Realization of DPSD Technique in Precision Impedance Analyzer

作　　者：王晓俊[1] 周杏鹏[1] 王毅 

机构地区：[1]南京东南大学自动控制系,南京210096 [2]南京长盛仪器有限公司,南京211100

出　　处：《仪器仪表学报》2006年第6期592-595,共4页Chinese Journal of Scientific Instrument

摘　　要：研究了20～1MHz范围内数字阻抗分析仪中相敏检波器的设计原理，并详细介绍了基于该原理的信号采集原理、关键参数的计算、功能电路的设计，及以DSP为核心的相敏检波器实时算法。实践表明，该新型相敏检波器的研制成功使得阻抗分析仪的整机性能和性价比都较传统仪器有了很大的提高。The theory of a novel digital phase detector in 20～1MHz impedance analyzer is proposed. The signal sampling theory, the calculation of key parameters, the design of function circuits, and the real-time algorithm based on DSP are described in detail. The results indicate that using the impedance analyzer implemented with such a novel phase detector can tremendously improve its performance and the performance-price ratio, comparing with the traditional instruments.

关 键 词：阻抗测量 相敏检波器 等效采样 实时算法 

分 类 号：TM933.3[电气工程—电力电子与电力传动]