Patent ID: 6556158
Filing Date: 2003-04-29
Classification: H03M

Abstract:
A method for converting an analog input signal to a digital output signal comprising the steps of:(a) generating a first digital signal comprising a signal component representing a combination of said analog input signal and a dithering signal; (b) generating an analog feedback signal by digital-to-analog converting said first digital signal; (c) generating an analog residue signal by combining said analog input signal and said analog feedback signal; (d) generating an analog compensation signal using a method comprising the step of processing said residue signal with a first analog filter of at least zeroth order; (e) generating said dithering signal using a method comprising the step of processing said analog residue signal with a second analog filter; the order said second analog filter is at least one higher than the order of said first analog filter; (f) generating a second digital signal comprising a signal component representing said analog compensation signal; and (g) generating said digital output signal by combining said first digital signal and said second digital signal.