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

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

doi:10.1109/TCSII.2017.2742517

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

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

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-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 language	English
Article number	8014483
Pages (from-to)	1509-1513
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	65
Issue number	11
DOIs	https://doi.org/10.1109/TCSII.2017.2742517
Publication status	Published - 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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10.1109/TCSII.2017.2742517

Cite this

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

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.",

keywords = "EMI, Spread spectrum clock, display interface, nested modulation profile, wireless interference",

author = "Jaehun Jun and Bae, {Sang Geun} and Yeonho Lee and Chulwoo Kim",

note = "Funding Information: Manuscript received March 17, 2017; revised July 8, 2017; accepted August 14, 2017. Date of publication August 22, 2017; date of current version October 29, 2018. This work was supported by the IT Research and Development Program of MOTIE/KEIT (Design technology development of ultra-low voltage operating circuit and IP for smart sensor SoC) under Grant 10052716. This brief was recommended by Associate Editor G. Kolumban. (Corresponding author: Chulwoo Kim.) J. Jun is with the Department of Electrical Engineering, Korea University, Seoul 02841, South Korea, and also with Circuit Research Division, LG Display, Paju 10845, South Korea. Publisher Copyright: {\textcopyright} 2004-2012 IEEE.",

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doi = "10.1109/TCSII.2017.2742517",

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AU - Lee, Yeonho

AU - Kim, Chulwoo

N1 - Funding Information: Manuscript received March 17, 2017; revised July 8, 2017; accepted August 14, 2017. Date of publication August 22, 2017; date of current version October 29, 2018. This work was supported by the IT Research and Development Program of MOTIE/KEIT (Design technology development of ultra-low voltage operating circuit and IP for smart sensor SoC) under Grant 10052716. This brief was recommended by Associate Editor G. Kolumban. (Corresponding author: Chulwoo Kim.) J. Jun is with the Department of Electrical Engineering, Korea University, Seoul 02841, South Korea, and also with Circuit Research Division, LG Display, Paju 10845, South Korea. Publisher Copyright: © 2004-2012 IEEE.

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AB - 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.

KW - EMI

KW - Spread spectrum clock

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KW - nested modulation profile

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

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Keywords

ASJC Scopus subject areas

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