Table 3 Comparison of the simulated 4:2 and 7:2 approximation compressors’ performance with process variations and subthreshold Swing.
Proposed | Power (µW) | Mean Power (µW) | Std Dev Power (µW) | Maximum Delay (ps) | Mean Delay (ps) | Std Dev Delay (ps) | Subthreshold Swing (mV/dec) | Std Dev SS (mV/dec) | Total Transistor Count | Quantity of Mistakes | PDP (ns × µW) |
|---|---|---|---|---|---|---|---|---|---|---|---|
Compressor 4:2 | 0.164 | 0.170 | 0.015 | 21.4 | 22.1 | 1.8 | 130 | 12 | 31 | 1/16 | 0.0035096 |
Compressor 7:2 | 0.873 | 0.910 | 0.082 | 43.2 | 44.5 | 3.6 | 145 | 15 | 73 | 36/128 | 0.03771 |
Compressor 4:2 [10] | 0.394 | 0.410 | 0.037 | 24.7 | 25.4 | 2.1 | 160 | 18 | 42 | 1/16 | 0.097 |
Compressor 5:2 [10] | 0.415 | 0.432 | 0.039 | 31.6 | 32.5 | 2.6 | 170 | 20 | 64 | 6/32 | 0.131 |
[14] | 13.77 | 14.30 | 1.29 | 31.03 | 32.0 | 2.8 | 200 | 25 | 50 | -- | 0.44397 |
[38] | 53.969 | 56.10 | 5.05 | 41.067 | 42.3 | 3.7 | 220 | 28 | 39 | 3/16 | 1.3142 |
