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An efficient technique for excess loop delay compensation in continuous-time ΔΣ modulators

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  • A highly-digital technique is proposed for excess loop delay (ELD) compensation in multi-bit continuous-time ΔΣ modulators. A digitally controlled reference switching matrix is used to replace the power-hungry signal adder and extra DAC driving the quantizer, which are commonly used in ELD compensation. With the proposed technique, the feedback DAC is embedded in the quantizer and implemented by a few switches. Thus it allows low voltage and low-power operation.
  • This paper is a postprint of a paper submitted to and accepted for publication in Electronics Letters and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library. It can be found at: http://digital-library.theiet.org/content/journals/el.
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  • Zhang, Y., Chen, C. H., & Temes, G. C. (2013). Efficient technique for excess loop delay compensation in continuous-time ΔΣ modulators. Electronics Letters, 49(24), 1522-1523. doi:10.1049/el.2013.3470
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  • 49
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  • 24
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  • This research was supported by Maxim Integrated.
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