Stable high-order delta-sigma digital-to-analog converters |
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Authors: | Kiss P. Arias J. Li D. Boccuzzi V. |
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Affiliation: | Dept. of Commun. Circuits Res., Agere Syst., Allentown, PA, USA; |
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Abstract: | Stability analysis of high-order delta-sigma loops is a challenge. In this brief, a sufficient design criterion is presented for high-order multibit error-feedback digital-to-analog converters (DACs) which are especially suitable for high-speed operation. This analytical criterion might be too conservative, but it allows for the design of stable, robust, and high-resolution delta-sigma DACs. Both analytical and numerical analysis are performed for verification. Also, experimental results of a discrete-component multiplier-free prototype demonstrate 10-b operation at a very low oversampling ratio of 4. |
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