Search

Closed-form expressions of radiated emissions from power distribution networks (PDNs) in packages are derived based on the equivalent lumped-circuit model. The expressions are validated with results from full-wave numerical computations and far-field measurements. The effects of the small planar PDN structures on radiated emissions are quantitatively investigated based on the sensitivity analysis. Using the closed-form expressions, a systematic procedure for developing quantified PDN design guidelines to suppress the radiated emissions is formulated, which is then demonstrated with a test prototype PDN. The method allows the electromagnetic compatibility aware PDN design in the initial design stage. [ABSTRACT FROM AUTHOR]

A burst stimulus of data is a common activity in circuits and systems. The supply noise voltage waveform induced by a burst train of integrated circuit (IC) switching currents is rigorously derived for a power distribution network (PDN) with power traces, commonly used in handheld devices. Closed-form expressions are proposed to quickly estimate the amount of voltage drop and overshoot and to develop more complete PDN design methodology as improved target impedances. The proposed PDN noise expressions are also validated with SPICE simulation and measurements using a fabricated IC and PCB. [ABSTRACT FROM AUTHOR]