Low-jitter frequency-modulated PLL

  title={Low-jitter frequency-modulated PLL},
  author={Thomas Steinecke},
  journal={2012 Asia-Pacific Symposium on Electromagnetic Compatibility},
  • Thomas Steinecke
  • Published 2012 in
    2012 Asia-Pacific Symposium on Electromagnetic…
Frequency modulation of a clock is a well-known and efficient way to spread clock harmonics around a center frequency, thus reducing emitted narrow-band RF energy. While smoothly changing the clock periods, modulation continuously shifts the clock edges back and forth over a time interval determined by the modulation frequency. The resulting time interval error compared to an unmodulated clock may get so large that it violates the specification of commonly used asynchronous data protocols. This… CONTINUE READING

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