Data converter with gain scaling including dither

Coded data generation or conversion – Analog to or from digital conversion – Increasing converter resolution

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341155, H03M 120

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active

054832381

ABSTRACT:
A data converter is disclosed that includes a multiplier for multiplying digital signal samples by a gain factor to produce multiplied digital samples. The multiplier can either be bypassed or a dither signal can be introduced in the multiplication operation. A multiplexer responsive to a select input selectively provides either the digital signal samples or the multiplied digital signal samples as the output of the multiplexer.

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An Audio Engineering Society Preprint Presented at the 95th Convention 1993, Oct. 7-10, New York, "A Single Chip Stereo Audio Codec for PC Multimedia Applications", by Scott McDonald, et al., Crystal Semiconductor Corporation, Austin, Tex., pp. 1-13.
Oversampling Delta-Sigma Data Converters, Theory, Design and Simulation, edited by James C. Candy and Gabor C. Temes, IEEE Press, A Selected Reprint Volume published in 1992, "Oversampling Methods for A/D and D/A Conversion", pp. 1-29.
"Digital Dither: Signal Processing with Resolution Far Below the Least Significant Bit", by Vanderkooy et al., Audio Research Group, University of Waterloo, Waterloo, Canada, AES 7th International Conference, Audio in Digital Times, Toronto, Canada, May 14-17, 1989, pp. 87-96.
"A 16b Oversampling CODEC with Filtering DSP", IEEE International Solid State Circuits Conference, vol. 34, Feb. 1991, New York, US, pp. 74-75, Okamoto et al.

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