A 5 Gb/s Automatic Within-Pair Skew Compensator for Differential Data in 0.13 mu m CMOS

作者：Zheng Yuxiang^*; Liu Jin

来源：IEEE Transactions on Circuits and Systems I-Regular Papers, 2011, 58(6): 1191-1202.

DOI：10.1109/TCSI.2010.2094317

• Intra-pair skew compensation
• skew detection
• within-pair skew compensation

This paper presents an automatic within-pair skew compensator for high-speed differential data transmission. A wide-bandwidth data delay line is proposed to provide adjustable delay for data signals. Also presented is an on-chip within-pair skew detection circuit to detect skew between the differential data signals for automatic close-loop skew compensation. A within-pair skew compensator prototype for 5 Gb/s data was fabricated in 0.13 mu m CMOS. Measurement results show that the within-pair skew compensator can automatically compensate for within-pair skew of +/- 200 ps (+/- 1 unit interval). It consumes 20.4 mW from 1.2 V supply and occupies 0.015 mm(2) die area.

• 出版日期2011-6