10-10-2012, 11:17 AM
Worst-Case Estimation for Data-Dependent Timing Jitter and Amplitude Noise in High-Speed Differential Link
Worst-Case Estimation.pdf (Size: 817.98 KB / Downloads: 26)
Abstract
Differential signaling has been widely used in highspeed
interconnects. Signal integrity issues, such as inter-symbol
interference (ISI) and crosstalk between the differential pair, however,
still cause significant timing jitter and amplitude noise and
heavily limit the performance of the differential link. The pre-emphasis
filter is commonly used to reduce ISI but may potentially
change the crosstalk behavior. In this paper, we first propose formula-
based jitter and noise models considering the combined effect
of ISI, crosstalk, and pre-emphasis filter.With the same set of
input patterns, experiment shows our models achieve within 5%
difference compared with SPICE simulation. By utilizing these formula-
based models, we then develop algorithms to directly find out
the input patterns for worst-case jitter and worst-case amplitude
noise through pseudo-Boolean optimization (PBO) and mathematical
programming. In addition, a heuristic algorithm is proposed to
further reduce runtime. Experiments show our algorithms obtain
more reliable worst-case jitter and noise compared with pseudorandom
bit sequences simulation and, meanwhile, reduce runtime
by