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Journal of Applied Sciences
  Year: 2013 | Volume: 13 | Issue: 6 | Page No.: 948-951
DOI: 10.3923/jas.2013.948.951
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Cascaded Second Order Stages Adaptive Delta Sigma Modulation using OTAS

Farouq M. Al-Taweel

In this study, Proposed Cascaded Second order stages ADSM structure with single-bit quantization for the first stage and multi-bits for the rest of the stages provides better SNQR compared to the ordinary cascaded single stage ADSM structures. This paper proposes a unique two techniques of a cascaded second order ADSM system utilizing, adaptive quantization estimation and adaptive prediction estimation. The proposed system employs high Operational Transconductance Amplifier (OTA) having higher gain, enhanced performance and better sensitivity for the cascaded structure than normal ADSM. This new approach would achieve continuous time varying step size and high SQNR with oversampling ratios. Full system simulations are provided to illustrate the effect of linearity error quantization path for the cascaded structures.
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How to cite this article:

Farouq M. Al-Taweel , 2013. Cascaded Second Order Stages Adaptive Delta Sigma Modulation using OTAS. Journal of Applied Sciences, 13: 948-951.

DOI: 10.3923/jas.2013.948.951






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