Patent ID: 8461901
Filing Date: 2013-06-11
Classification: H03D

Abstract:
1. A harmonic rejection mixer, comprising: a plurality of phase rotators fed by a common input local oscillator signal having a reference frequency, each one of the phase rotators separating the common local oscillator signal into a pair of channels with an in-phase signal in one of the channels having a ninety degree phase shift relative to a quadrature signal in the other one of the channels, each one of the channels providing a selected gain to the in-phase signal and quadrature signal therein and wherein the phase rotator combines the gain provided in-phase signal and quadrature signal to produce a composite local oscillator signal having a selected one of a plurality of phase shifts relative to the common input local oscillator signal; and a plurality of mixer sections, each one of the mixer sections being fed the composite local oscillator signal of a corresponding one of the plurality of phase rotators and an input signal to translate the frequency of the input signal by a frequency related to the having a reference frequency of the local oscillator signal.