rosy65
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Hi all,
I am working on 40Msps 12bit Pipeline ADC 1.5bit/stage. I have to optimize the accuracy and power consumption. My goal is to do the spectral analysis of the output, and the final ENOB and SNR values should be around 12bit and 73dB. I wrote Veriloga models for all the main blocks comparator Preamp and latch, Switch capacitor array and OpAmp. Now I want to sweep the gain and bandwidth of opamp and determine the required parameter metrics of the opamp. I got stuck on how to sweep the values of those. instead of merely sweeping from 50db - 100db or so, is there any way to find the required gain of the opamp for the pipeline adc. I have found like GBW = 1/settling time and the calculated values gain = 66dB and GBW = 0.17GHz. If i am using these values and doing spectral analysis, the ENOB and SNR are around 4bits and 35dB for 2^12 samples. I am not sure where I am doing wrong .
Any leads would be of great help.
Thank you.
I am working on 40Msps 12bit Pipeline ADC 1.5bit/stage. I have to optimize the accuracy and power consumption. My goal is to do the spectral analysis of the output, and the final ENOB and SNR values should be around 12bit and 73dB. I wrote Veriloga models for all the main blocks comparator Preamp and latch, Switch capacitor array and OpAmp. Now I want to sweep the gain and bandwidth of opamp and determine the required parameter metrics of the opamp. I got stuck on how to sweep the values of those. instead of merely sweeping from 50db - 100db or so, is there any way to find the required gain of the opamp for the pipeline adc. I have found like GBW = 1/settling time and the calculated values gain = 66dB and GBW = 0.17GHz. If i am using these values and doing spectral analysis, the ENOB and SNR are around 4bits and 35dB for 2^12 samples. I am not sure where I am doing wrong .
Any leads would be of great help.
Thank you.