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

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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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 electro-magnetic interference without any degradation in the other characteristics. A test chip was fabricated using a 55-nm CMOS process, and the test results indicate a 41-dB reduction. The sensitivity of a wireless receiver to interference is tested, and the EVM results for the proposed nested profile exhibits an improvement of 1.4 dB compared to those of the triangular profile.

Original languageEnglish
Article number8014483
Pages (from-to)1509-1513
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume65
Issue number11
DOIs
Publication statusPublished - 2018 Nov

Keywords

  • EMI
  • Spread spectrum clock
  • display interface
  • nested modulation profile
  • wireless interference

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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