High dynamic range time-varying integrated receiver for elimination of off-chip filters

摘要

A quadrature mixer with an LO input is provided. The quadrature mixer receives a signal having a frequency E LO and a signal input having a frequency F SIG and has an output that comprises an output impedance that is high at frequencies of [F LO -F SIG ] and [ FLO + F SIG ]and low at other. A mixer coupled to the output impedance interacts with the output impedance such that an impedance presented at the signal input is high for signals at F SIG if F SIG is a predetermined signal frequency, and low at other frequencies.