Patent ID: 10361667

Abstract:
Embodiments of the disclosure relate to a low noise amplifier (LNA) circuit. The LNA circuit includes an LNA configured to amplify a radio frequency (RF) input signal to generate an RF output signal. The LNA may be inherently nonlinear and, as a result, can create a harmonic distortion(s), such as second harmonic distortion (HD2), and/or an intermodulation distortion(s), such as second order intermodulation distortion (IMD2), in the RF output signal. In exemplary aspects discussed herein, a distortion amplifier(s) is provided in the LNA circuit to generate a distortion signal(s) to suppress the harmonic distortion(s) and/or the intermodulation distortion(s) in the RF output signal. By suppressing the harmonic distortion(s) and/or the intermodulation distortion(s) in the RF output signal, the LNA circuit may protect an adjacent RF band(s), such as the fifth-generation ultra-high-band (5G UHB), from the harmonic and/or intermodulation distortion(s) without compromising overall noise figure (NF) of the LNA circuit.