Open AccessGroup‐delay‐insensitive linear equaliser for reducing eye‐skew in PAM‐4 receivers
Author(s) -
Wu Kejun,
Zhang Huazi
Publication year - 2017
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2017.1167
Subject(s) - equaliser , skew , group delay and phase delay , control theory (sociology) , pulse amplitude modulation , computer science , power consumption , transfer function , power (physics) , mathematics , electronic engineering , pulse (music) , algorithm , engineering , telecommunications , physics , artificial intelligence , electrical engineering , quantum mechanics , detector , decoding methods , control (management) , bandwidth (computing)
A novel group‐delay‐insensitive linear equaliser (GDILE) is proposed to reduce the eye‐skew in four‐level pulse amplitude modulation (PAM‐4) receivers. With a cross‐coupled positive‐feedback degeneration network, the proposed GDILE employs additional pole and zero into its transfer function to reduce the group‐delay variation with frequency. Simulation results shows a 40 Gbit/s PAM‐4 receiver that employs a GDILE that can reduce the eye‐skew by 73% compared with the conventional linear equaliser with a modest increase of power consumption.