Title:
相対位相検出器、相対位相検出方法および情報読み取り装置
Document Type and Number:
Japanese Patent JP5617066
Kind Code:
B2
Abstract:
It detects the relative phase of two measured signals using two reference signals. The relative phase detector 1 comprises reference signal generator 11, beat signal processor 12 and detecting element 13. As for reference signal generator 11, a frequency interval generates two reference signals which are the same as the frequency interval of the measured signal of two above. The beat signal processor 12 generates two beat signals from the reference signal of two measured signals and two above, and generation does the multiplication signal of these two beat signals. It removes constant decided by detection system from the DC component of the multiplication signal, and detecting element 13 detects the relative phase of two measured signals.
Inventors:
塩田 達俊
Application Number:
JP2011508336A
Publication Date:
November 05, 2014
Filing Date:
March 29, 2010
Export Citation:
Assignee:
国立大学法人埼玉大学
International Classes:
G01J9/04
Attorney, Agent or Firm:
Kubota Chiga mind