LNA with very low noise and high linearity for multimode transceivers

摘要

An amplifier for operating at low, middle or high linearity modes, the amplifier comprising a first low noise amplifier (LNA) coupled to a second low noise amplifier for providing amplification; a first degeneration inductor coupled to the first LNA for providing impedance matching; a g3 generation block coupled to an output of the second LNA for canceling third-order transconductance distortion; and a first enabling/disabling component coupled to the output of the second LNA and aligned in parallel with the g3 generation block for operating at least one of the first and second LNAs at one of the low, middle or high linearity modes.