Spread spectrum clock generator: A low-cost EMI solution

Minyoung Song, Chulwoo Kim

Research output: Chapter in Book/Report/Conference proceedingChapter


In this chapter, spread spectrum clock generation (SSCG)-an advanced clock generation solution for electromagnetic interference (EMI) -is presented. EMI becomes critical as the clock speed and the degree of integration are increased. Various EMI suppression techniques are introduced in this chapter. Among EMI suppression techniques, SSCG is a simple but cost-effective solution since it requires no external components and can be implemented using existing clock generators. Several SSCG design approaches are described. Similar to other clock generators, SSCG also faces implementation issues, for example, noise, non linearity, and mismatch. Finally, recent spread spectrum clocking (S SC) modulation profiles are presented and discussed because the SSC modulation profile dominates the EMI performance.

Original languageEnglish
Title of host publicationPhase-Locked Frequency Generation and Clocking
PublisherInstitution of Engineering and Technology
Number of pages28
ISBN (Electronic)9781785618857
Publication statusPublished - 2020 Jan 1

Bibliographical note

Publisher Copyright:
© The Institution of Engineering and Technology 2020.


  • Clocks
  • Electromagnetic interference
  • Interference suppression
  • Modulation
  • Spread spectrum communication

ASJC Scopus subject areas

  • General Engineering


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