Evaluation and optimization of crosstalk noise in multi-core processors´ power delivery system

Signal integrity and associated optimization techniques in power delivery network for multi-core processors, whether powered by a single converter or several power converters, are discussed. The high integration of the multi-core processors on a single die makes chipset´s sensitivity to crosstalk noise more likely. Several power converters in a multi-core processor system could improve energy efficiency and dynamic performance among others. However, this paper focuses on how several power converters can be used to achieve over 60dB of crosstalk noise isolation. Crosstalk noise can be reduced by dedicating a power converter for each processor core (or more) and placing the power converters between the processors cores.