wjxcom
Full Member level 5
Ask everyone for advice. Recently, according to the paper "A 12b-ENOB 61 µ W noise Shaping SAR ADC with a passive integrator", an 8-bit asynchronous SAR ADC was developed. The simulation results show that this structure is not as powerful as the paper wrote, and the quantization noise base has not been improved.
As shown in the figure below, input a 1MHz signal. The red is the output fft of noise shaping sar adc, and the yellow is the prototype output fft. Asynchronous timing is adopted, and the clock is 50MHz. It can be seen that the red curve shows a certain slope change outside the band; But within the band, there is little difference between the two.
As shown in the figure below, input a 1MHz signal. The red is the output fft of noise shaping sar adc, and the yellow is the prototype output fft. Asynchronous timing is adopted, and the clock is 50MHz. It can be seen that the red curve shows a certain slope change outside the band; But within the band, there is little difference between the two.