Patent ID: 9379673
Filing Date: 2016-06-28
CPC Classification: H03F,H04L

Claim Text:
1. A device, comprising: a main two-stage low noise amplifier (LNA) configured to amplify a carrier aggregation (CA) communication signal, the main two-stage LNA comprising a first LNA stage and a second LNA stage, an output of the first LNA stage coupled to an input of the second LNA stage, the first LNA stage configured to produce a first stage output signal at the output of the first LNA stage having a first stage second order intermodulation product, the second LNA stage comprising a phase-inverter configured to phase-invert the first stage output signal to generate a second stage phase-inverted output signal at an output of the second LNA stage; and an auxiliary LNA stage coupled to the first LNA stage of the main two-stage LNA, the auxiliary LNA stage configured to cancel the first stage second order intermodulation product of the first stage output signal when a non-phase-inverted output of the auxiliary LNA stage is combined with the second stage phase-inverted output signal.