US Patent 7358798 Nonlinear filter

A system and a method are disclosed for converting analog signal to digital. An analog to digital converter system comprises an analog to digital converter (ADC) and an adaptive filter coupled to the ADC, wherein the adaptive filter is coupled to the ADC in a feedforward configuration. A method of generating a digital signal based on an analog signal comprises applying the analog signal to an analog to digital converter (ADC) to generate an ADC output and sending the ADC output to an adaptive filter, wherein the adaptive filter is coupled to the ADC in a feedforward configuration.