Data-dependent jitter and crosstalk-induced bounded uncorrelated jitter in copper interconnects

This paper resolves the jitter impairment of non-return-to-zero data in transmission lines. The limited bandwidth of the transmission line introduces data-dependent jitter. Crosstalk between neighbouring lines results in bounded uncorrelated jitter in the data eye. An analytical approach to representing data-dependent jitter and crosstalk-induced bounded uncorrelated jitter is presented. Comparison with jitter measurements of microstrip lines on FR4 board demonstrated accuracy to within 15% of the predictions for deterministic jitter.

I. Introduction

Exceptional effort is focused on extending the data rate capabilities of economical copper backplanes. While VLSI circuit speed is steadily increasing, the wires between chips and even on-chip are becoming bottlenecks [1] [2]. To avoid costly optical interconnects, circuit designers are forced to equalize the channel to increase the data rate, implement alternative channel coding schemes, or simply use more parallel channels [3] [4]. Ultimately, space and power dissipation limits the number of parallel channels.