In this paper, we proposed a spread spectrum clock generator (SSCG) for the Serial AT Attachment Generation 2 (SATA-II). We use a fractional-N PLL to accomplish the spread spectrum function. The SSCG integrates a conventional PLL, a digital 3rd order MASH 1-1-1 delta-sigma modulator and an address generator. The SSCG generates clocks at 1.5 GHz, a 5000 ppm down spread with a triangular waveform frequency modulation of 33 KHz. The circuit has been simulated in 0.18 um CMOS technology. The non spread spectrum clocking has a jitter of 80ps and the peak amplitude reduction is 23.44 dBm in spread spectrum mode. The power dissipation from a 1.8V supply is 55 mW.
|頁（從 - 到）||2643-2646|
|期刊||Proceedings - IEEE International Symposium on Circuits and Systems|
|出版狀態||Published - 23 五月 2005|
|事件||IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan|
持續時間: 23 五月 2005 → 26 五月 2005