Design and Analysis of a Highly Efficient Linearized CMOS Subharmonic Mixer for Zero and Low-IF Applications

Abstract— the distortion analysis of a linearized CMOS subharmonic mixer (SHM) based on a Volterra
series analysis. The second- and third-order intermodulation distortions are reduced by a modified second-harmonic reinjection in the RF transconductance stage. An injected IM2 is mixed with an RF input signal and generates an IM3 signal with the same amplitude and opposite phase of a main path for the cancellation of the intrinsic IM3 signal. In order to cancel the second-order intermodulation component, a signal with the same IM2 amplitude and opposite phase of the main path is generated. Closedform expressions of the conversion gain along with the secondand third-order distortions are derived using a Volterra series analysis to facilitate an optimal design and provide an insight into
the nonlinearity of SHM.< final year projects >