发明授权
- 专利标题： Detection of changes in an interval of time between optical or electrical signals
- 专利标题（中）： 检测光或电信号间隔时间的变化
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申请号： US12545696申请日： 2009-08-21
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公开(公告)号： US08242767B2公开(公告)日： 2012-08-14
- 发明人: Florian Lohl , Johann Zemella , Holger Schlarb , Frank Ludwig , Axel Winter , Matthias Felber
- 申请人： Florian Lohl , Johann Zemella , Holger Schlarb , Frank Ludwig , Axel Winter , Matthias Felber
- 申请人地址： DE
- 专利权人： Deutsches Elektronen-Snychrotron Desy
- 当前专利权人： Deutsches Elektronen-Snychrotron Desy
- 当前专利权人地址： DE
- 代理机构： Hovey Williams LLP
- 优先权： DE102008045359 20080822
- 主分类号： G01R19/00
- IPC分类号： G01R19/00
摘要：
A method is disclosed for detecting changes in an interval of time (ΔT) between an optical or electrical signal and an optical or electrical reference signal using a photodetector. The method may be used to synchronize an optical or electrical signal with an optical or electrical reference signal. An apparatus for carrying out the method is also disclosed. The method comprises the steps of: receiving the optical signal and the optical reference signal by means of the photodetector, outputting an electrical response signal at an output of the photodetector, the electrical response signal having a frequency spectrum which depends on the interval of time (ΔT), filtering a selected harmonic from the frequency spectrum of the electrical response signal which has been output, and detecting changes in the interval of time (ΔT) from changes in the amplitude of the selected harmonic.
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