Achieving Techniques on Reference Signal from a Optical Chopper Circuit

摘要：

A lock-in amplifying technique finds its use in the online determination of gasses in low concentrations against extremely strong background noise,however a more stable reference frequency signal is matched to some resonance frequency as requested.Therefore it could not gain a higher resolution and an accurate analysis until a more stable reference frequency signal is got.Several methods for improving performances of optical chopper circuit have been tried.A relatively stable reference frequency signal is abstracted.

关键词： weak signal analysis optical chopper circuit reference frequency signal

作者: Zhiying Wu Lihui Zhang Wang zhang Qingxu Yu

作者单位: Research Institute of Optoelectronic Science & Technology, Dalian University of Technology, Dalian, Information Engineering Department, Environmental Manangement College of China, Qinhuangdao, China,

会议类型: 国内会议

会议名称: 第九届人-机-环境系统工程大会

会议地点: 辽宁丹东

会议语种:英文

页码: 103-105

在线出版日期: 2009-07-24（万方平台首次上网日期，不代表论文的发表时间）