Patent ID: 6570521
Filing Date: 2003-05-27
Classification: H03M

Abstract:
A multistage scrambler for a digital to analog converter having a non-ideal transfer function resulting from an error function which causes harmonic distortion, said scrambler comprising:a first shuffling network having a first input for receiving digital data and a first output, said first shuffling network including a first set of data switches; a first sequence generator for selectively interconnecting said first set of data switches to reorder at said first output the digital data received at said first input to reduce the harmonic distortion to lower magnitude colored noise; a second shuffling network having a second input for receiving the reordered digital data from said first output and a second output, said second shuffling network including a second set of data switches; and a second sequence generator for selectively interconnecting said second set of data switches to reorder at said second output the digital data received at said second input to transform the colored noise toward lower power white noise.