Elimination of idle tones by a second order 2-bit adaptive sigma delta modulation system

Authors:
E. A. Prosalentis;G. S. Tombras
Affiliations:
Department of Electronics, Computers, Telecommunications and Control, Faculty of Physics, University of Athens, Athens, Greece 157 84;Department of Electronics, Computers, Telecommunications and Control, Faculty of Physics, University of Athens, Athens, Greece 157 84
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2010

Citing 2
Cited 0

Description of a 2-bit adaptive sigma-delta modulation system with minimized idle tones

EURASIP Journal on Advances in Signal Processing
Refined error analysis in second-order ΣΔ modulation with constant inputs

IEEE Transactions on Information Theory

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Abstract

We investigate the operation and implementation aspects of a second order 2-bit adaptive sigma---delta modulation system that offers complete elimination of the idle tones without dithering as needed by various other adaptive and simple sigma delta schemes. Performance comparisons made by computer simulation indicate that this advantageous feature together with the enhanced performance stability is due to the combination of both "memory" and "look-ahead" estimation of the employed step-size adaptation algorithm.