Banca de DEFESA: ANTONIO WALLACE ANTUNES SOARES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ANTONIO WALLACE ANTUNES SOARES
DATA : 23/11/2018
HORA: 09:00
LOCAL: Auditório do nPITI
TÍTULO:

Analysis and Design of a 4th-Order Incremental Sigma-Delta A/D Converter

PALAVRAS-CHAVES:

Analog to Digital Converters; Incremental Sigma Delta; Sigma Delta; Fourth-order; Biomedical Applications; Multielectrod Arrays; Modeling; Switched Capacitor.

PÁGINAS: 100
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Medidas Elétricas, Magnéticas e Eletrônicas; Instrumentação
ESPECIALIDADE: Instrumentação Eletrônica
RESUMO:

The Multielectrode Arrays (MEA) manufactured on CMOS standard technology integrated circuits have allowed the study of several types of cell cultures, allowing the stimulation and recording of electrical activities of the cells in vitro. As the CMOS technology advances, the biomedical signal processing is suitably done in digital domain. Therefore, basic blocks such as Analog to Digital Converters (ADC) are essential to realize the interface in the mixed signal systems. In this way, this work proposes the design of an ADC to be applied in the multichannel biomedical signal acquisition systems, following the top-down approach for the Integrated Circuit design (IC). The architecture of the ADC consists of an Incremental Sigma Delta  Converter (IΣΔ), which combines the high-precision characteristic of the traditional $\Sigma\Delta$ modulators with the advantage of the sample-by-sample conversion of the Nyquist converters, making it suitable for multichannel time-multiplexed applications. The modulator and digital filter which compose the IΣΔ ADC consist of the  single-loop Cascaded-Integrator FeedForward (CIFF) and Cascade-of-Integrator (CoI) topologies respectively, both fourth-order. The modulator was implemented in Discrete Time (DT), using the Switched Capacitor technique (SC). The circuits were designed using TSMC 0.18 um CMOS technology and the results were obtained from post-layout simulations.

MEMBROS DA BANCA:
Presidente - 1284113 - SEBASTIAN YURI CAVALCANTI CATUNDA
Interno - 2140683 - DIOMADSON RODRIGUES BELFORT
Interno - 1543191 - LUIZ FELIPE DE QUEIROZ SILVEIRA
Externo à Instituição - ANTONIO PETRAGLIA - UFRJ
Externo à Instituição - CLEONILSON PROTASIO DE SOUZA - UFPB