Table 1 SNR of the reconstructed signal versus number of iterations for the second order SDM with λ = 1
From: A sigma–delta analog to digital converter based on iterative algorithm
Iteration number | ||||||||
|---|---|---|---|---|---|---|---|---|
Filter type | OSR | Quantization bits | 0 | 2 | 4 | 10 | 15 | 20 |
FIR | 16 | 3 | 18.15 | 43.58 | 55.10 | 57.06 | 57.19 | 57.15 |
5 | 18.14 | 43.73 | 64.18 | 69.66 | 69.98 | 70.02 | ||
32 | 3 | 15.32 | 42.0 | 57.96 | 60.35 | 60.58 | 60.67 | |
5 | 15.32 | 42.16 | 65.08 | 77.51 | 78.33 | 78.48 | ||
64 | 3 | 21.79 | 29.63 | 44.67 | 67.02 | 66.46 | 67.07 | |
5 | 21.98 | 29.75 | 44.42 | 72.89 | 78.18 | 77.90 | ||
IIR | 16 | 3 | 15.40 | 42.76 | 49.72 | 51.04 | 52.48 | 52.78 |
5 | 15.40 | 43.66 | 61.61 | 63.07 | 63.40 | 64.12 | ||
32 | 3 | 16.12 | 45.24 | 57.24 | 60.16 | 60.79 | 61.26 | |
5 | 17.32 | 46.34 | 61.67 | 66.11 | 67.15 | 67.50 | ||
64 | 3 | 21.65 | 30.52 | 38.83 | 50.03 | 66.88 | 76.96 | |
5 | 21.65 | 30.52 | 38.83 | 50.07 | 67.32 | 81.53 | ||