Patent ID: 7190751

Claim:
A digital signal processing circuit, comprising: an analog-to-digital signal converter producing a digitized input signal; a filter circuit, including: a conditioning stage, operating at a rate corresponding to an input signal to be sampled, deriving an intermediate signal from said input signal as a function of a single adjustable parameter α adapted to determine an operating characteristic of said conditioning stage, where α is used to determine filter coefficients C 1 , C 2 and C 3 according to the relationships C 1 =−α, C 2 =2 n +2α, and C 3 =C 1 , where n is a bit width of said input signal; and an output stage, operating at a sampling rate, deriving a sampled signal as a function of said intermediate signal, said parameter further adapted to govern characteristics of a frequency response associated with said sampled signal; and a digital-to-analog signal converter that produces an analog output signal based on said sampled signal.