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Note: Low phase noise programmable phase-locked loop with high temperature stability.

Vojtěch Michálek1, Ivan Procházka1

  • 1Czech Technical University in Prague, Břehová 7, 115 19 Prague, Czech Republic.

The Review of Scientific Instruments
|April 5, 2017
PubMed
Summary
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This study presents a low jitter, programmable phase-locked loop (PLL) designed for high-precision timing. Its low phase temperature coefficient and subpicosecond precision make it ideal for demanding applications like event timers.

Area of Science:

  • Electrical Engineering
  • Physics
  • Instrumentation

Background:

  • High-precision timing is critical for applications such as event timers and scientific instrumentation.
  • Existing timing solutions often face limitations in jitter, phase stability, and programmability.
  • The need for clock sources with subpicosecond precision and low phase temperature coefficients is increasing.

Purpose of the Study:

  • To design and construct a programmable phase-locked loop (PLL) with exceptionally low jitter.
  • To achieve a low temperature coefficient of phase for enhanced stability.
  • To develop a clock source suitable for demanding high-precision timing applications, particularly event timers.

Main Methods:

  • Implementation of a novel PLL architecture focusing on jitter reduction.

Related Experiment Videos

  • Integration of a temperature compensation mechanism for phase stability.
  • Design for programmable output frequency (100 MHz–500 MHz) and amplitude (0.25 V–1.2 Vpp).
  • Inclusion of an on-board temperature-compensated crystal oscillator for standalone operation.

    • Main Results:

    • The designed PLL exhibits jitter in the few hundreds of femtoseconds range.
    • The device offers programmable output frequencies from 100 MHz to 500 MHz and amplitudes from 0.25 V to 1.2 Vpp.
    • A low temperature coefficient of phase lock (0.9 ps/K near room temperature) was achieved.
    • The PLL can be locked to standard reference frequencies (5 MHz or 10 MHz) or operate standalone.

    Conclusions:

    • The developed programmable PLL meets the stringent requirements for high-precision timing applications.
    • Its low jitter and stable phase performance are suitable for subpicosecond precision event timers.
    • The integrated features, including temperature compensation and standalone capability, enhance its versatility.