Modeling FPGA Current Waveform and Spectrum and PDN Noise Estimation

Abstract

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.

Meeting Name

DesignCon 2008 (2008: Feb. 4-7, Santa Clara, CA)

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Printed Circuit Board; Microprocessors; Field programmable gate arrays

International Standard Book Number (ISBN)

978-1-60560-345-2

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 Altera Corporation, All rights reserved.

Publication Date

07 Feb 2008

Link to Full Text

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