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Title: Design and implementation of sigma delta analog-to-digital converter
Authors: Ong, Chee Kian.
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Electronic circuits
Issue Date: 1997
Abstract: Oversampling Analog-to-Digital Converter based on high-order sigma-delta modulation provides an effective means of achieving high-resolution analog-to-digital conversion in VLSI technology. Its high-order noise shaping reduces the quantization noise in the signal band. This thesis includes the formulation of the equation for the minimum amplitude requirement of the first-order sigma delta modulator. This formula can predict the minimum amplitude of a sinewave required for the successful operation of a first-order modulator. The non-linear characteristic of the first-order modulator's noise is observed in conjunction with the finding of the minimum amplitude requirement. The non-linear characteristic of the first-order modulator's noise causes a cleft on the SNR graph of a multistage modulator when the implemented gains value of the modulator differ from the designed gains value. This has greatly affected the choice of architectures for implementation.
Fulltext Permission: restricted
Fulltext Availability: With Fulltext
Appears in Collections:EEE Theses

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