A spread-spectrum clock generator with direct VCO modulation in open-loop

IEICE Electronics Express

Daejeong Kim¹  Hyunsun Mo¹ 

[1] Department of Electronics Engineering, Graduate School, Kookmin University

关键词: spread spectrum;    VCO modulation;    clock generator;   

DOI  :  10.1587/elex.14.20170417

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

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.

【 授权许可】

CC BY