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Additional
Friis formulas for noise
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Friis formulas for noise
Friis formula
or
Friis's formula
(sometimes
Friis' formula
), named after Danish-American electrical engineer
Harald T. Friis
, refers to either of two formulas used in
telecommunications engineering
to calculate the
signal-to-noise ratio
of a multistage
amplifier
. One relates to
noise factor
while the other relates to
noise temperature
.
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