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Design and Analysis of Higher-Order Sigma Delta Modulator

  • Deepti MalhotraEmail author
  • Alpana Aggarwal
Conference paper
  • 17 Downloads
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 1089)

Abstract

The paper focuses on basics of analog-to-digital conversion. Various types of analog-to-digital converters are available. Here, the basics of one of its type, sigma delta, is discussed, starting from quantization and then moving to first-, second-, and third-order structures. The SNR obtained is 62 dB and 61.4 B, 91.9, respectively. Moving toward higher order with same approach causes instability. Therefore, an architecture using feedback or feedforward may be used. Some of the popular higher-order topologies are based on feedback and feedforward arrangements: cascade of resonator-feedback form (CRFB), cascade of resonator-feedforward form (CRFF), cascade of integrator-feedback form (CIFB), and cascade of resonator-feedforward form (CIFF) with SNR achieved as 140 dB, 153.6 dB, 141.8 dB, and 164.4 dB, respectively.

Keywords

Sigma delta Quantization Higher order Nyquist Oversampling ADC NTF STF 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Electronics and Communication EngineeringThapar UniversityPatialaIndia

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