Analysis And Application Of High Speed Interconnect System With WLP-FDTD

Nowadays, due to development of the Large Scale Integrated Circuit technology, application of new material technology, improvement of the system working frequency, the requirement for interconnection is higher and higher. Therefore, the analysis and research on high-speed interconnects is becoming more and more significant. And the study of signal integrity, power integrity and electromagnetic interference are also becoming more and more prominent.However, in the high-speed interconnect circuit system, the size and the electrical characteristic parameters of the interconnection lines are not uniform in the time and space, which results in the difficulty of the analysis. This paper aims to solve this problem and applies the WLP-PDTD method into the analysis of high-speed interconnect circuit system, which separates the variables of time and space. It avoids the stability problem of the conventional FDTD with restriction of Courant condition and is suitable for multi-scale analysis in high-speed systems.On the one hand, the increase of the circuit integration leads to the narrowing distance between the lines. In the meantime, the disturbance of them will become more and more severe, and the transmission parameter of the coupling lines is different, which is along with the change in length of the coupling lines. Under these circumstances, the one-dimensional WLP-FDTD is applied to analyze the multi non-uniform coupled transmission lines. And then, compared with the FDTD method and SPICE. At last, the program with GUI is developed for the non-uniform coupled transmission lines.On the other hand, in the power integrity analysis, a pair of power plane and ground plane forms a fundamental power delivery network. According to the equivalent circuit modeling, the power ground planes can be regarded as 2D circuit networks composed of resistance, inductance and capacitance in the ideal situation. This structure is analyzed by two-dimensional WLP-FDTD method and compared with the conventional FDTD. Simulation results show the 2D WLP-FDTD method is more efficient than the 2D FDTD in analysis of power delivery networks.