Sigma-Delta Modulator Design and Analysis for Audio Application

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2015 by IJETT Journal
Volume-30 Number-5
Year of Publication : 2015
Authors : Jadhav Archana, Sujeet Mishra
  10.14445/22315381/IJETT-V30P244

MLA 

Jadhav Archana, Sujeet Mishra"Sigma-Delta Modulator Design and Analysis for Audio Application", International Journal of Engineering Trends and Technology (IJETT), V30(5),235-238 December 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
A Sigma-delta modulator is designed in 180nm CMOS process for digital Audio applications. This design is simulated on S-Edit of Tanner EDA tool. In this design continuous time sigma-delta modulator is implemented to reduce the noise problem. This sigma-delta modulator also helps to reduce power consumption of circuit. In these design two stage op-amps is used to implement modulator. Also this design uses second order continuous time modulator for increasing SNR. Circuit design an 11bit low power sigma-delta modulator for digital audio application is given, using a single bit quantizer. The power supply for this circuit is only 1.8v; the modulator achieves 72dB SNR in a 20 KHz BW, while consuming 1mW.

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Keywords
Analog-to-digital converter (ADC), continuous time, data converter, over sampling, sigma-delta modulation.