CIRCUITS AND METHODS FOR PERFORMING HARMONIC REJECTION MIXING

摘要

Circuits and methods for performing harmonic rejection mixing are provided. In some embodiments, the circuit comprises: a first amplifier that amplifies a received signal at a first gain; a second amplifier that amplifies the received signal at a fraction of the first gain; a mixer that receives a local oscillator signal having a first fundamental frequency and the first amplifier output, and outputs a first mixed signal; a second mixer that receives a second local oscillator signal having a fundamental frequency that is a multiple of the first fundamental frequency and the second amplifier output, and outputs a second mixed signal; and an output stage that receives the first and second mixed signals and outputs a sum of the first and second mixed signals.