An accurate power delivery system (PDS) design methodology for high‐speed digital systems

Abstract

SUMMARYThe trend in high-speed digital circuits is to increase speed and density and to operate at lower voltage. This fast increase in the switching speed combined with the decrease of the operating voltage causes the allowable absolute voltage variations to decrease, which makes the PDS design a more challenging task than ever.Moreover, the complex 3D nature of the modern PDS causes it to be more sensitive to capacitors' placement as well as capacitance value.In this paper, we introduce an efficient complete solution for the design of high-speed digital PDS. This solution (a) takes the effects of the decoupling capacitor placement into consideration through a 3D electromagnetic simulation of the PDS, (b) defines a more-realistic PDS design target, and (c) presents a clear capacitor value selection methodology. Finally, we applied our methodology to an industrial test case, compared its results with that of industrial design, and showed its advantages.

Time‐domain ringing noise analysis induced in transmission lines using the common and normal mode concepts

“…Many countermeasures of electromagnetic noise are developed to change geometrical circuit design for stable operation in various fields 13,14 . One successful application of electromagnetic noise reduction in multiconductor transmission lines is a power supply for a heavy ion medical particle accelerator in Chiba, Japan (HIMAC).…”