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10 May 2007The electrical origin of the 1/f electrical noise in solid-state devices and integrated circuits
Contrarily to current theories based on hypothetical traps where charge carriers can translocate to, this paper gives an
explanation for 1/f electrical noise in solid-state devices based on well known electrical effects taking place in these
devices. A parasitic capacitor and the backgating effect of its thermal noise, both overlooked in the course of the years,
are the basis of the above explanation. The above effect produces a resistance noise with a Lorentzian spectrum in any
unbiased resistor. As soon as the resistor is biased, this spectrum is scattered into a continuous set of Lorentzian noise
terms that synthesize 1/f noise over a frequency band that is an exponential function of the bias voltage VDS expressed in
thermal units VT. This is due to the exponential dependence of the dynamical resistance in most semiconductor junctions.
A VDS=180mV is thus enough to give 1/f noise over three decades at room temperature. This unexpected and non-linear
feature, where the spectrum of this noise results from the own bias used to measure it, has kept 1/f noise as a puzzling
and enigmatic noise for more than eighty years. The above theory, born in the solid-state field, can also be generalized to
other devices where two orthogonal forces or energy gradients appear while electrical noise is being measured.
José-Ignacio Izpura
"The electrical origin of the 1/f electrical noise in solid-state devices and integrated circuits", Proc. SPIE 6590, VLSI Circuits and Systems III, 65901O (10 May 2007); https://doi.org/10.1117/12.721175
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José-Ignacio Izpura, "The electrical origin of the 1/f electrical noise in solid-state devices and integrated circuits," Proc. SPIE 6590, VLSI Circuits and Systems III, 65901O (10 May 2007); https://doi.org/10.1117/12.721175