didac
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manresa,spain
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Hi, If you look at footnote 7 in Razavi's book he states that in fact is not a gm it's gds at VDS=0, so in fact gds=gd0. In non-saturate area noise is equal to I2=4kTγgd0, with γ=1, while in saturation γ=2/3(long-channel devices) and γ=2..3(short-channel devices). Hope it helps,
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