Patent ID: 8150352

Claim:
A system, comprising: a clock generator configured to generate a clock signal having a frequency of |f bp +f i |; a mixer configured to input (1) an input signal that includes a desired signal at the frequency f i and (2) the clock signal and generate a mixed signal using the input signal and the clock signal; a filter, having a bandpass region that includes the frequency f bp that is higher in frequency than f i , configured to input the mixed signal and generate a filtered signal based at least in part on the bandpass region; and a controller configured to set f bp to be greater than 0.5*f e −1.5*f i — min +0.25*f bw , wherein the input signal includes an undesired signal in the frequency range −f e to +f e , f i — min is a minimum input signal frequency, and f bw is the bandwidth of the bandpass region of the filter.