This paper describes an efficient methodology for
mid-frequency delta-I noise analysis of the power distribution network
of a computer system. The method allows fast and accurate
power noise simulations with SPEED97 on highly complex packaging
structures. Simulation results for the mid-frequency power
noise amplitudes on module and board planes and dependencies
on decoupling capacitor parameters are presented. The package
model used for the simulations allow the identification of the
dominant resonant oscillations on the power distribution system
following a delta-I step and yield the time response of the on-chip,
on-module and on-board decoupling capacitors. The simulation
results have been confirmed by measurements within 5%.
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