Novel Far-End Crosstalk Noise Canceling Structure With Floating Shape in Memory Module

This article proposes a new structure of floating shape in a dual in-line memory module (DIMM) that can effectively suppress the far-end crosstalk noise. The floating shape located under the gold finger of the DIMM is not connected to any signal line or power/ground planes, but overlaps multiple signal lines. This structure can effectively enhance mutual capacitance coupling between signal lines, thereby alleviating the far-end crosstalk noise. For verification, the simulated results of the far-end crosstalk voltage and eye diagram are compared. The proposed structure shows that the far-end crosstalk voltage is greatly reduced from 44.8 to 24.0 mV and the eye diagram is improved by about 17% for both eye height and width. System-level experiments also prove the effectiveness of the proposed design.