Description of a 2-Bit Adaptive Sigma-Delta Modulation System with Minimized Idle Tones
© E. A. Prosalentis and G. S. Tombras. 2008
Received: 3 June 2007
Accepted: 28 October 2007
Published: 12 November 2007
A 2-bit adaptive sigma delta modulation system that inherently eliminates the idle tones present in conventional and other adaptive sigma delta systems is described. The system incorporates both memory and look-ahead instantaneous step-size estimations and, as shown by computer simulation results apart from eliminating the unwanted idle tones despite dithering, it offers improved SNR performance and extended dynamic range.
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