Question about some parameters for computing Noise Figure
时间：04-08
整理：3721RD
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There is one formula for computing Cgs which enable us to compute the best transistor size for minimum Noise Figure:
Gopt=α*ωo*Cgs*sqrt(δ*(1-c2)/5γ)
Generally, Gopt=1/50 ohms
And in the book of RFIC design written by Thomas Lee, these values are set to be:
α=0.85，γ=2，δ=2γ=4 for 0.5um
But I wonder whether these values are reasonable when we do a real design? I mean using 0.5um technology. If not, how can we determine these values?
THanks
Gopt=α*ωo*Cgs*sqrt(δ*(1-c2)/5γ)
Generally, Gopt=1/50 ohms
And in the book of RFIC design written by Thomas Lee, these values are set to be:
α=0.85，γ=2，δ=2γ=4 for 0.5um
But I wonder whether these values are reasonable when we do a real design? I mean using 0.5um technology. If not, how can we determine these values?
THanks