A Spread Spectrum Clock Generator with Nested Modulation Profile for High-Resolution Display System

Jaehun Jun, Sang Geun Bae, Yeonho Lee, Chulwoo Kim

Research output: Contribution to journalArticle


A spread-spectrum clock generator is implemented using a nested modulation profile to reduce the peak power levels of radiated electro-magnetic emissions in display products. The display data interface is a potential source of interference, and the spread spectrum technique has been extensively used for display interfaces. The proposed nested profile can further reduce EMI without any degradation in the other characteristics. A test chip was fabricated using a 55nm CMOS process, and the test results indicate a 41dB reduction. The sensitivity of a wireless receiver to interference is tested, and the EVM results for the proposed nested profile exhibits an improvement of 1.4dB compared to those of the triangular profile.

Original languageEnglish
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Publication statusAccepted/In press - 2017 Aug 22



  • Clocks
  • display interface.
  • Electromagnetic interference
  • EMI
  • Frequency modulation
  • Jitter
  • nested modulation profile
  • Radiation detectors
  • Spread spectrum clock
  • wireless interference

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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