Eugene wrote on Jan 6th, 2008, 12:52pm:It's easier if the gain of the stage is programmable. If as you vary the gain, the input referred compression point remains fixed while the output referred compression point varies with gain, the amplifier input limits linearity. On the other hand, if the output referred compression point remains fixed while the input referred compression point varies with gain, then the amplifier output limits linearity.
Eugene,
I agree with the oIP3 part.
But for iIP3, if it is fixed with gain variation, it means iIP3 has 1dB/dB with input signal increase, which means it is not linearity limited. Am I missing anything?