利用抖动改善有耗σ - δ调制器的性能

Third IEEE International Workshop on Electronic Design, Test and Applications (DELTA'06) Pub Date : 2006-01-17 DOI:10.1109/DELTA.2006.94

J. Goette, M. Jacomet, M. Hager

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引用次数: 3

摘要

传统的sigma-delta (SigmaDelta)模数(AD)转换器是基于一个有源模拟SigmaDelta调制器和一个数字滤波器。在早期的论文中，我们提出了一种不需要有源模拟元件的一阶SigmaDelta调制器的新架构。它的优点是模数转换器可以在fpga内实现，也可以直接在微处理器软件中实现。然而，它的缺点是，它实现了一个有损耗的sigmaddelta调制器，伴随着有限的分辨率。在这里，我们建议使用抖动注入来放松分辨率限制，我们给出的仿真结果表明我们的想法是有效的

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Using dither to improve the performance of lossy sigma-delta modulators

Conventional sigma-delta (SigmaDelta) analog-to-digital (AD) converters are based on an active analog SigmaDelta modulator followed by a digital filter. In earlier papers we proposed a new architecture for a first-order SigmaDelta modulator that needs no active analog components. Its advantage is that AD converters can be implemented within FPGAs or directly in the software of microprocessors. Its disadvantage is, however, that it realizes a lossy SigmaDelta modulator with an accompanying limited resolution. Here we propose to use dither-injection to relax that resolution limitation and we present simulation results showing that our ideas work

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Third IEEE International Workshop on Electronic Design, Test and Applications (DELTA'06)

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