Simulation of Second order Sigma Delta ADC for improving SNR upto 97dB for Software Defined Radio for 3G & 4G mobile receivers

摘要

Abstract-Sigma Delta ADC is most commonly used ADC due to its advantage of trading off the speed with resolution at high sampling rate. High resolution ADC provides higher accuracy of data converters from analogue to digital. I-A ADC works, principally withthe concepts of oversampling, quantization noise shaping, digital filtering, and decimation. This paper presents a simulation and the designing overview of 2nd order sigma delta ADC. This shows the effectiveness of the simulation tool MATLAB. Through which we evaluate the SNR up to 97db. A digitally programmable Delta-Sigma modulator for 4G radios is presented in the paper.