High-speed differential IO crosstalk — The impact of phase, bit rate, jitter and equalization

Abstract

Loss, reflection, and crosstalk are among the key factors in the design of high-speed differential channels for signal integrity. Some signal integrity techniques are used to improve link performance to compensate for loss, such as TXLE and receiver equalization using CTLE and DFE. When these techniques are used they also impact crosstalk. In this paper, impacts on crosstalk are studied for various factors including phase difference among aggressors and victim, jitter, and bit rate. TXLE of aggressors are studied in detail with several cases. Receiver equalization using CTLE and DFE is included to reveal how RX equalization responds to the crosstalk from aggressors. Observations are made through this study to guide future signal integrity simulation and design to properly control the crosstalk.