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Related Experiment Videos

Conjugate regenerative dividers.

Amitava Sen Gupta1, J Francisco Garcia Nava, Fred L Walls

  • 1Time & Frequency Division, NIST, Boulder, CO, USA. sengupta@mail.nplindia.ernet.in

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|May 7, 2004
PubMed
Summary

This study introduces a novel regenerative divider capable of frequency division by integers greater than two. The new design achieves lower phase noise and greater flexibility compared to traditional dividers.

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Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Electronics

Background:

  • Regenerative dividers are essential components in frequency synthesis.
  • Traditional designs are limited to division by two.
  • Achieving higher division ratios typically involves complex circuits.

Purpose of the Study:

  • To present a novel self-starting regenerative divider design.
  • To enable frequency division by integers other than two (e.g., 3, 4, 5, 6...).
  • To demonstrate improved phase noise performance.

Main Methods:

  • Designing a regenerative divider loop that oscillates at two harmonically related conjugate frequencies.
  • Constructing a prototype divide-by-four circuit for 400 MHz input.
  • Modifying the feedback loop for different division ratios.

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Main Results:

  • The prototype divide-by-four circuit achieved low phase noise (-162 dBc/Hz at 1 kHz, -170 dBc/Hz at 100 kHz).
  • Phase noise was approximately 9 dB lower than constituent parts.
  • Simple modifications allowed division by 3, 5, and 8.

Conclusions:

  • The novel regenerative divider design offers flexible and improved frequency division.
  • The design shows potential for higher division ratios.
  • This advancement could impact various electronic systems requiring precise frequency control.