Victor Matheus Lima | Universidade Federal do Pampa (original) (raw)
Analog IC Design, Data converters
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National & Kapodistrian University of Athens
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Papers by Victor Matheus Lima
Sigma-Delta analog-to-digital converters (ADCs) are known for providing high resolutions when com... more Sigma-Delta analog-to-digital converters (ADCs) are known for providing high resolutions when compared to other ADC architectures. They are composed of a sigma-delta modulator and a digital decimation filter. This work focuses is in the high-level design of discrete-time sigma-delta modulators (DT-SDMs) whereas the design and implementation of first and second-order modulators are analyzed using Matlab. A complete performance analysis of each modulator is described using the cascade of integrators in feedback (CIFB) structure. It is worth mentioning that our study has a focus on medium bandwidth (BW) applications, as such audio applications. Besides, we target low-voltage operations. This work is at an early stage, thus only first and second-order modulators are investigated. This work considers a BW of 24 kHz, a sampling frequency of 6.144 MHz, and oversampling (OSR) of 128. Index Terms-sigma-delta modulators, sigma-delta ADC, DT-SDM CIFB structure.
Sigma-Delta analog-to-digital converters (ADCs) are known for providing high resolutions when com... more Sigma-Delta analog-to-digital converters (ADCs) are known for providing high resolutions when compared to other ADC architectures. They are composed of a sigma-delta modulator and a digital decimation filter. This work focuses is in the high-level design of discrete-time sigma-delta modulators (DT-SDMs) whereas the design and implementation of first and second-order modulators are analyzed using Matlab. A complete performance analysis of each modulator is described using the cascade of integrators in feedback (CIFB) structure. It is worth mentioning that our study has a focus on medium bandwidth (BW) applications, as such audio applications. Besides, we target low-voltage operations. This work is at an early stage, thus only first and second-order modulators are investigated. This work considers a BW of 24 kHz, a sampling frequency of 6.144 MHz, and oversampling (OSR) of 128. Index Terms-sigma-delta modulators, sigma-delta ADC, DT-SDM CIFB structure.