An advanced monolithic digitalized random carrier frequency spread-spectrum clock generator for EMI suppression  

作　　者：郭海燕 陈早 张波 李肇基 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated devices University of Electronic Science and Technology of China [2]Information Engineering School,Southwest University of Science and Technology

出　　处：《Journal of Semiconductors》2010年第6期128-128,I0001,I0002,00129,00130,共3页半导体学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.60436030).

摘　　要：A novel monolithic digitalized random carrier frequency modulation spread-spectrum clock generator （RCF-SSCG） is proposed.In this design,the output frequency of the proposed RCF-SSCG changes with the intensity of the capacitive charge and discharge current.Its analytical model is induced and the effect of the modulation parameters on the spread spectrum is numerically simulated and discussed.Compared with other works,this design has the advantages of small size,low power consumption and good robustness.The circuit has been fabricated in a 0.5μm CMOS process and applied to a class D amplifier in which the proposed RCF-SSCG occupies an area of 0.112 mm^2 and consumes 9 mW.The experimental results confirm the theoretical analyses.A novel monolithic digitalized random carrier frequency modulation spread-spectrum clock generator （RCF-SSCG） is proposed.In this design,the output frequency of the proposed RCF-SSCG changes with the intensity of the capacitive charge and discharge current.Its analytical model is induced and the effect of the modulation parameters on the spread spectrum is numerically simulated and discussed.Compared with other works,this design has the advantages of small size,low power consumption and good robustness.The circuit has been fabricated in a 0.5μm CMOS process and applied to a class D amplifier in which the proposed RCF-SSCG occupies an area of 0.112 mm^2 and consumes 9 mW.The experimental results confirm the theoretical analyses.

关 键 词：Ransom carrier frequency modulation spread-spectrum clock generator class D amplifier electromagnetic interference 

分 类 号：TN432[电子电信—微电子学与固体电子学]