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IEICE Electronics Express
Vol. 14 (2017) No. 17 pp. 20170417




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.

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

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