Linearized CMOS Distributed Bidirectional Amplifier with Cross-Coupled Compensator

Abstract

In this chapter, we demonstrate a fully-integrated fully-differential linearizedCMOS distributed bidirectional amplifier that achieves large IMD3 distortion reduction over broadband frequency range for both RF paths. The drain and gate transmissionlines were stagger-compensated. Reducing the DA IM3 distortion by mismatching the gate and drain LC delay-line ladders. A CMOS cross-coupled compensator transconductor is proposed to enhance the linearity of the DA gain cell with a varactor-based active post nonlinear drain capacitance compensator for wider linearization bandwidth.