TSV-to-TSV inductive coupling-aware coding scheme for 3D Network-on-Chip

Abstract

A reliable Three Dimensional Network-on-Chip (3D NoC) is required for future many-core systems. Through-silicon Via (TSV) is the prominent component of 3D NoC to support better performance and lower power consumption. Inductive TSV coupling has large disruptive effects on Signal Integrity (SI) and transmission delay. In this paper, TSV inductive coupling is analyzed based on technology process, TSV length, and TSV radius for a range of frequencies. A classification of inductive coupling voltage is presented for different TSV configurations. A novel coding technique is devised to mitigate the inductive coupling effects by adjusting the current flow pattern. Simulations for a 4×8 TSV matrix show 23% coupled voltage mitigation, imposing 12.5% information redundancy.