Title :
Modeling of spread-spectrum clock generation system using simulink
Author :
Ayoub, Walaa Ashraf ; Dessouky, Mohamed ; Sharaf, Khaled
Author_Institution :
Mentor Graphics, Cairo, Egypt
Abstract :
A spread-spectrum phase-locked loop (PLL) clock generation system is modeled and simulated using Simulink. A multi-phase voltage-controlled oscillator (VCO) along with a delta-sigma modulator is used for spreading with a triangular signal of 33 kHz frequency for an output frequency of 3 GHz. The achieved peak power reduction is 16dB at 5000ppm frequency down-spreading. The simulation time is around 4 hours for a complete period of the modulating frequency for a five order of magnitude ratio between the output signal to the modulating one.
Keywords :
delta-sigma modulation; phase locked loops; spread spectrum communication; voltage-controlled oscillators; PLL clock generation system; Simulink; delta-sigma modulator; frequency down-spreading; multiphase voltage-controlled oscillator; peak power reduction; spread-spectrum clock generation system; spread-spectrum phase-locked loop; triangular signal; Circuit stability; Frequency conversion; Frequency modulation; Silicon; Voltage-controlled oscillators; Phase-locked loops (PLLs); delta-sigma modulation; multi-phase VCO; spread-spectrum clock generation (SSCG);
Conference_Titel :
Microelectronics (ICM), 2010 International Conference on
Conference_Location :
Cairo
Print_ISBN :
978-1-61284-149-6
DOI :
10.1109/ICM.2010.5696213
