Patent ID: 8717212

Claim:
A circuit for demodulating a radio-frequency signal and providing a digital output signal, comprising: first through N th filter stages configured to receive first through N th input signals and first through N th analog feedback signals, respectively, and to generate first through N th corrected output signals; first through N th feedback conversion circuits configured to receive the digital output signal and generate the first through N th analog feedback signals, respectively; an output analog-to-digital converter configured to receive the first corrected output signal and generate the digital output signal, wherein N is an integer greater than 1, wherein each of the first through N th filter stages includes a resonator and a summing junction, wherein each of the first through (N−1) th filter stages includes an analog mixer and a frequency-shifting clock, wherein the resonators in each of the first through N th filter stages have different resonant frequencies, wherein the N th input signal is the radio-frequency signal, and wherein the first through (N−1) th input signals are the second through N th corrected output signals, respectively.