Sigma-Delta ADCs Converter a Study Case

Authors: Thiago Brito Bezerra, Mauro Lopes de Freitas, Waldir Sabino da Silva Júnior

Abstract:

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.

Keywords: Analysis, Oversampling Modulator, A/D converters, Sigma-Delta.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096679

References:

[1] Aziz, P.M. & Sorensen, H. V. & Spiegel, J. V. D. An overview of sigma-delta converters (1996) IEEE Signal Processing Magazine, pp 61- 84.
[2] Almeida, Will R. M. & Freire, R. C. S. & Catunda, S. Y. C. & Aboushady, Hassan (2010) “CMOS sigma-delta thermal modulator,” In: Proceedings of the IEEE International Conference on Instrumentation and Measurement Technology Conference, Austin, TX, USA. pp 555- 559.
[3] Almeida, Will R. M. & Freitas, Georgina M. & Palma, Ligia S. & Catunda, S. Y. C. & Freire, R. C. S. & Aboushady, Hassan & Santos, F. F. & Oliveira, Amauri (2007) “A constant temperature thermoresistive sigma-delta anemometer,” In: Proceedings of the IEEE International Conference on Instrumentation and Measurement Technology, Varsóvia. p 1-6.
[4] Almeida, W. R. M. & Belfort, D. R. & Freire, R. C. S. & Catunda, S. Y. C & Aboushady, Hassan (2009) “Thermal sigma-delta modulator using VHDL-AMS and SPICE”. In: The Symposium on Microelectronics Technology and Devices, Natal, Brazil. pp 10-14.
[5] Lang, W. & Wan, P. & Lin, P (2012) “A sigma-delta modulator for low power energy meter application. In: Proceedings of the IEEE International Conference on Solid-State and Integrated Circuit Technology, pp 1-3.
[6] Nilchi, A. & Johns, D (2013) “A low-power delta-sigma modulator using a charge-pump integrator”. IEEE Transactions on Circuits and Systems I: Regular Papers, v. 60, n. 5, pp 1310-1321.
[7] De La Rosa, J (2011) “Sigma-delta modulators: tutorial overview, design guide, and state-of-the-art survey”, IEEE Transactions on Circuits and Systems I: Regular Papers, v. 58, n. 1, pp 1-21.