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11 June 2007Digital switching noise as a stochastic process
Switching activity of logic gates in a digital system is a deterministic process, depending on both circuit parameters
and input signals. However, the huge number of logic blocks in a digital system makes digital switching a
cognitively stochastic process. Switching activity is the source of the so-called "digital noise", which can be analyzed
using a stochastic approach. For an asynchronous digital network, we can model digital switching currents
as a shot noise process, deriving both its amplitude distribution and its power spectral density. From spectral
distribution of digital currents, we can also calculate the spectral distribution and the power of disturbances
injected into the on-chip power supply lines.
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Giorgio Boselli, Gabriella Trucco, Valentino Liberali, "Digital switching noise as a stochastic process," Proc. SPIE 6600, Noise and Fluctuations in Circuits, Devices, and Materials, 66001V (11 June 2007); https://doi.org/10.1117/12.726292