Sigma-Delta Modulator Design and Analysis for Audio Application
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International Journal of Engineering Trends and Technology (IJETT) | 
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| © 2015 by IJETT Journal | ||
| Volume-30 Number-5 |
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| Year of Publication : 2015 | ||
| Authors : Jadhav Archana, Sujeet Mishra |
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| DOI : 10.14445/22315381/IJETT-V30P244 |
Citation
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.