A 100-dB gain-corrected delta-sigma audio DAC with headphone driver

An oversampled digital-to-analog converter (DAC) with a 100-dB A-weighted dynamic range is presented. It uses a switched-capacitor (SC) array to transfer the sampled charges directly into the headphone driver. The overall DAC gain is precisely controlled by a novel reference stage. A new dynamic ele...

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Bibliographic Details
Published in:Analog integrated circuits and signal processing 2007-04, Vol.51 (1), p.27-31
Main Authors: Wang, Ruopeng, Kim, Sang-Ho, Lee, Sang-Hyeon, You, Seung-Bin, Kim, Jae-Whui, Moon, Un-Ku, Temes, Gabor C.
Format: Article
Language:English
Subjects:
Algorithms
Digital to analog converters
Dynamic range
Headphones
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Summary:An oversampled digital-to-analog converter (DAC) with a 100-dB A-weighted dynamic range is presented. It uses a switched-capacitor (SC) array to transfer the sampled charges directly into the headphone driver. The overall DAC gain is precisely controlled by a novel reference stage. A new dynamic element matching algorithm, based on split-set data-weighted averaging (SDWA), is used to improve the dynamic range and to reduce the nonlinearity caused by mismatches in the multibit DAC.
ISSN:0925-1030
1573-1979
DOI:10.1007/s10470-007-9033-0