Patent ID: 6707402
Filing Date: 2004-03-16
Classification: H03M

Abstract:
A method for converting an analog input signal to a digital output signal, the method comprising the steps of:obtaining first and second analog sub-signals from the analog input signal; distorting the second analog sub-signal such that the second analog sub-signal contains substantially no useful information from the analog input signal below a threshold level; adding the second analog sub-signal to the analog input signal to form the first analog sub-signal, the added second sub-signal having a polarity such that the first analog sub-signal comprises a signal shape which is complementarily distorted with respect to the second analog sub-signal; subjecting each of the first and second analog sub-signals to an analog-to-digital conversion to form first and second digitalized sub-signals, respectively; and applying the first and second digitalized sub-signals to a digital signal processor to form the digital output signal therewith, wherein the applying the first and second digitalized sub-signals comprises cutting off the second digitalized sub-signal in the digital signal processor and not utilizing the second digitalized sub-signal in forming the digital output signal when the second digitalized sub-signal has no useful information from the analog input signal.