Patent ID: 8718591

Claim:
A radio frequency (RF) circuit comprising: a first mixer circuit configured to receive a first oscillation signal operating at approximately a first oscillation frequency and an input signal, wherein the first mixer circuit is configured to generate a first in-phase signal from the input signal with a frequency offset based on the first oscillation frequency and to generate a first quadrature phase signal from the input signal with a frequency offset based on the first oscillation frequency; a second mixer circuit operably associated with first mixer circuit and configured to receive a second oscillation signal operating at approximately a second oscillation frequency, wherein the second mixer circuit is configured to generate a second in-phase signal from the first in-phase signal and the first quadrature phase signal, such that the second in-phase signal has a frequency offset based on the second oscillation frequency, and to generate a second quadrature phase signal from the first in-phase signal and the first quadrature phase signal such that the second quadrature phase signal has a frequency offset based on the second oscillation frequency; and a polyphase reactive circuit comprising an in-phase channel having an in-phase impedance response, wherein the in-phase channel is configured to integrate the second in-phase signal from the second mixer circuit, and a quadrature phase channel having a quadrature phase impedance response, wherein the quadrature phase channel is configured to integrate the second quadrature phase signal from the second mixer circuit.