A multimode DLL with trade-off between multiphase and static phase error

作者：Zhang D.; Zhu W.; Li W.; Huang Z.; Gao L.; Yang H.^*

来源：Chinese Journal of Semiconductors, 2014, 35(5): 055010.

DOI：10.1088/1674-4926/35/5/055010

• DLL
• multimode
• multiphase
• static phase error

A multimode DLL with trade-off between multiphase and static phase error is presented. By adopting a multimode control circuit to regroup the delay line, a better static phase error performance can be achieved while reducing the number of output phases. The DLL accomplishes three operation modes: mode1 with a four-phase output, mode2 with a two-phase output and a better static phase error performance, and mode3 with only a one-phase output but the best static phase error performance. The proposed DLL has been fabricated in 0.13 μm CMOS technology and measurement results show that the static phase errors of mode1, mode2 and mode3 are -18.2 ps, 11.8 ps and -6:44 ps, respectively, at 200 MHz. The measured RMS and peak-to-peak jitters of mode1, mode2 and mode3 are 2.0 ps, 2.2 ps, 2.1 ps and 10 ps, 9.3 ps, 10 ps respectively.

• 出版日期2014
• 单位中国科学院大学