Arbitrary Design of High Order Noise Transfer Function for A Novel Class of Reduced-Sample-Rate Sigma-Delta-Pipeline ADCs

2006 ◽  
Author(s):  
V. Majidzadeh ◽  
O. Shoaei
Keyword(s):  
Transfer Function ◽  
High Order ◽  
Sigma Delta ◽  
Noise Transfer Function ◽  
Sample Rate ◽  
Pipeline Adcs

scholarly journals Technique to Improve SNR for Sigma Delta Adcs for Audio Signals

2018 ◽  
Vol 7 (3.6) ◽  
pp. 91
Author(s):  
Ramana Murthy Dumpala ◽  
. .
Keyword(s):  
Transfer Function ◽  
Second Order ◽  
Analog To Digital Converters ◽  
Clock Frequency ◽  
Audio Signals ◽  
Sigma Delta ◽  
Feed Forward ◽  
Analog To Digital ◽  
Noise Transfer Function

A RISR architecture for Sigma-delta analog to digital converters with modified noise transfer function to obtain a better performance in terms of SNR is proposed. Cascading of two modified second order modulators are done to achieve 4th order modulator. Behavioral simulations are done to study the performance of feed-forward and the modified cascaded architecture. They are designed to operate at 1.28MHz clock frequency for audio applications (OSR of 32). It is noted that SNR of 115dB is achieved by cascading of two Modified second order RISR architectures which is 8dB more than the normal RISR architecture.  

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