Title :
A simple and efficient dithering method for vector quantizer based mismatch-shaped ΔΣ DACs
Author :
Sanyal, Arindam ; Sun, Nan
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
This paper presents an in-depth analysis of the generation of tones in the output spectra of vector-quantizer (VQ) based multibit mismatch-shaped ΔΣ digital-to-analog converters (DACs). Building upon the analysis, a simple yet elegant method of adding dither to remove tones from the output spectra is presented. It achieves a better mismatch shaping performance with a low hardware cost compared to existing dithering techniques.
Keywords :
delta-sigma modulation; vector quantisation; dithering method; dithering techniques; mismatch shaping performance; mismatch-shaped ΔΣ DAC; multibit mismatch-shaped ΔΣ digital-to-analog converters; output spectra; tone generation; vector quantizer; Modulation; Noise; Quantization; Random sequences; Stability analysis; Sun; Vectors;
Conference_Titel :
Circuits and Systems (ISCAS), 2012 IEEE International Symposium on
Conference_Location :
Seoul
Print_ISBN :
978-1-4673-0218-0
DOI :
10.1109/ISCAS.2012.6272082
