Digital noise shaper circuit

摘要

The invention relates to a digital noise shaper circuit for generating an output digital data stream having pre-defined noise characteristics from a multi-bit input digital data stream. The noise shaper circuit includes a greater than two-pole digital filter network (1902-1910) for receiving and processing an error signal to generate the output data stream, a comparator (1924) responsive to the output data stream for generating a feedback signal, a feedback processing network (1926-1934) responsive to the feedback signal for frequency-shaping the feedback signal, and adders (1912-1920) for digitally adding the multi-bit input digital data stream and the frequency-shaped feedback signal to generate the error signal.