Modeling FPGA Current Waveform and Spectrum and PDN Noise Estimation
Dynamic current variations in FPGA or microprocessors are major characteristics for analyzing noise in a power delivery network (PDN). Direct measurement of FPGA dynamic current variation is a very difficult problem, and is less studied than other PDN design questions. In this paper, a methodology to model the FPGA dynamic current waveform and its spectrum is developed and presented. Implementation of an impedance transfer function allows predicting noise at a remote point on the PCB. Using modeling results, the noise waveform and spectrum in the PDN on the PCB is estimated. Measurements at the remote point on the PCB help evaluate the proposed methodology and show a good correlation between theory and experiments. This research demonstrates also the implementation of a dynamic current modeling methodology for PDN analysis and PCB decoupling design.
I. Zamek et al., "Modeling FPGA Current Waveform and Spectrum and PDN Noise Estimation," DesignCon 2008, Altera, Jan 2004.
Electrical and Computer Engineering
Materials Science and Engineering
Keywords and Phrases
Printed Circuit Board
Library of Congress Subject Headings
field programmable gate arrays
Article - Conference proceedings
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