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On precise phase difference measurement approach using border stability of detection resolution.

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This study introduces an improved dual phase coincidence detection method for precise phase difference measurement. By leveraging circuit detection fuzzy areas, measurement precision can surpass picosecond levels, enhancing digital phase coincidence detection circuits.

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Area of Science:

  • Electrical Engineering
  • Metrology
  • Signal Processing

Background:

  • Digital phase coincidence detection circuits have limited measurement resolution, typically at the nanosecond level.
  • Precise phase difference measurement is crucial in various scientific and engineering applications.

Purpose of the Study:

  • To develop an improved dual phase coincidence detection method for enhancing phase difference measurement precision.
  • To explore a novel approach utilizing circuit detection fuzzy areas to overcome resolution limitations.

Main Methods:

  • An improved dual phase coincidence detection method is developed.
  • The method utilizes the border stability of circuit detection fuzzy areas.
  • A common oscillator signal is used for phase coincidence detection with two comparison signals.

Main Results:

  • The improved method achieves measurement precision finer than the picosecond level.
  • The system resolution is demonstrated to depend on circuit measurement resolution stability, not the device resolution itself.
  • Two detection fuzzy areas are identified around strict phase coincidence due to finite detection resolution.

Conclusions:

  • The developed method offers a significant improvement in phase difference measurement precision.
  • Leveraging fuzzy area border stability provides a pathway to sub-picosecond resolution.
  • This technique enhances the capabilities of digital phase coincidence detection circuits beyond their inherent resolution limits.