Sigma-Delta ADCs Converter a Study Case

The Sigma-Delta A/D converters have been proposed
as a practical application for A/D conversion at high rates because of
its simplicity and robustness to imperfections in the circuit, also
because the traditional converters are more difficult to implement in
VLSI technology. These difficulties with conventional conversion
methods need precise analog components in their filters and
conversion circuits, and are more vulnerable to noise and
interference. This paper aims to analyze the architecture, function and
application of Analog-Digital converters (A/D) Sigma-Delta to
overcome these difficulties, showing some simulations using the
Simulink software and Multisim.

• Thiago Brito Bezerra
• Mauro Lopes de Freitas
• Waldir Sabino da Silva Júnior

• Analysis
• Oversampling Modulator
• A/D converters
• Sigma-Delta.

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