Simultaneous switching noise analysis using superposition techniques
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United States of America Patent
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Jul 19, 2011
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N/A
app pub date -
Feb 20, 2008
filing date -
Feb 20, 2008
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Abstract
Extended linear superposition methods, computer program products and systems to calculate Simultaneous Switching Noise (SSN) on victim Input/Output (I/O) pins of an electronic component caused by aggressor I/O pins is provided. A method includes calculating the quiet output voltage on a victim pin caused by the power supply only, and then calculating an aggressor noise response induced on the victim pin caused by a single aggressor pin and the power supply. To calculate SSN for a combination of aggressors, the SSNs for the different aggressors are linearly combined, and then the effects of the power supply are discounted by using the calculated quiet output voltage. Additionally, a linear victim substitution model is introduced to replace a full buffer model for a victim pin with a resistor with different resistance values depending on the induced voltage. Further, an alternate transmission line model is introduced to simplify SSN simulations of transmission lines.
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