Patent ID: 7564396

Claim:
Device for digitally processing an analog input signal for isolating a desired signal that is susceptible to variations in signal power, the device comprising an analog to digital converter for converting the analog input signal to a digital signal to be processed, a digital signal processor for digitally processing the digital signal from the analog to digital converter, the digital signal processor including a digital filter, and a control unit for adjusting a filtering accuracy of at least one of the analog to digital converter and the digital signal processor unit in dependence of a signal quality of the input signal, wherein the analog to digital converter includes a loop comprising a loop filter, and the control unit is arranged for adjusting the filtering accuracy of the loop filter, wherein the loop filter comprises a sequence of a number of loop units constituting a loop filter of a filtering order related to the number of loop units, and the control unit is arranged for adjusting the filtering accuracy of the loop filter by adjusting the filtering order by activating or deactivating at least one loop unit.