aaron_do
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Hi,
If you are talking low frequencies, ideally the cascode MOS doesn't contribute to the nonlinearity since Iout,M1 = Iout,M2 where M1 is the input transistor and M2 is the cascode. That's my understanding anyway.
At high frequencies (RF) the above equation doesn't hold due to the capacitances at the interconnecting node.
cheers, Aaron
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