karthikchanda
Newbie level 1
- Joined
- Mar 24, 2014
- Messages
- 1
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1
- Activity points
- 10
View attachment CIFF.rarHi All,
I am studying the working of Delta Sigma(DS) and Incremental Delta Sigma ADCs. I am trying to implement those in Simulink. For DS I am getting proper output with noise shaping and good SNR. But when I am using the same structure for IDS with the reset connected to integrator, I am getting third and fifth harmonics in the spectrum which are with in my band width. So my SNR is degrading. The only change I did from DS to IDS is reset to integrators. Please some one help me i understanding the problem. Is it that my structure is wrong for IDS or The way I am resetting the integrator is wrong or any coefficients in the CIFF structure are wrong. I am attaching my simulink file. Help me in handling the harmonics. Suggest any book/materials for Incremental DS
Thanks
I am studying the working of Delta Sigma(DS) and Incremental Delta Sigma ADCs. I am trying to implement those in Simulink. For DS I am getting proper output with noise shaping and good SNR. But when I am using the same structure for IDS with the reset connected to integrator, I am getting third and fifth harmonics in the spectrum which are with in my band width. So my SNR is degrading. The only change I did from DS to IDS is reset to integrators. Please some one help me i understanding the problem. Is it that my structure is wrong for IDS or The way I am resetting the integrator is wrong or any coefficients in the CIFF structure are wrong. I am attaching my simulink file. Help me in handling the harmonics. Suggest any book/materials for Incremental DS
Thanks
