IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
A spread-spectrum clock generator with direct VCO modulation in open-loop
Hyunsun MoDaejeong Kim
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2017 Volume 14 Issue 17 Pages 20170417

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Abstract

A new topology is proposed to achieve a spread-spectrum clock generator. It employs a new modulation filter, consisting of two capacitors and a resistor. The modulated triangular waveform is formed at the center of the control voltage coming from the segregated PLL. A definite advantage is that the spreading behavior does not affect the bandwidth of the PLL. Moreover, the modulation filter consumes smaller chip area because a larger resistor can be utilized for the required bandwidth.

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© 2017 by The Institute of Electronics, Information and Communication Engineers
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