计算机技术与发展2016，Vol.26Issue(4)：144-147,4.DOI:10.3969/j.issn.1673-629X.2016.04.032
一种Sigma Delta调制的SATA3扩频时钟发生器
A Spread Spectrum Clock Generator for SATA3 Based on Sigma Delta
摘要
Abstract
A spread spectrum clock generator for SATA3 with Sigma Delta modulation is proposed. The design is based on a fractional-N PLL,including phase detector,charge pump,loop filter,voltage-controlled oscillator,divider and triangular waveform modulator. The output waveform with constant frequency produced by the triangular waveform generator is transformed by a sigma delta modulator and controls the loop frequency divider to get compliance to SATA3. The circuit generates a 6 GHz clock with a 5000 ppm down spread spec-trum modulated by a triangular waveform at 31. 25 kHz with a 100 MHz reference clock. The power obtained is reduced 21. 58 dB com-pared with not using spread spectrum. The circuit adopts 65 nm CMOS with a supply of 1. 2 V,consuming 43 mW. The structure affected by process parameters change is small,and the circuit structure is relatively simple,with stable performance,easy to integration.关键词
SATA3/锁相环/扩频时钟/三角波调制Key words
SATA3/PLL/spread spectrum clock/triangular waveform modulation分类
信息技术与安全科学引用本文复制引用
王希,邵刚,吕俊盛,田泽..一种Sigma Delta调制的SATA3扩频时钟发生器[J].计算机技术与发展,2016,26(4):144-147,4.基金项目
航空科学基金(2015ZC51036) （2015ZC51036）
中国航空工业集团创新基金(2010BD63111) （2010BD63111）
