Table 2
The number of devices and respective voltage levels.
| No. of levels | Symmetric | First asymmetric | Second asymmetric |
|---|---|---|---|
| Nlevel | Nsw | Ns | Nd |
| 7 | 7 | 3 | 3 |
| 15 | 11 | 7 | 7 |
| 31 | 19 | 15 | 15 |
| 63 | 35 | 31 | 31 |
| 127 | 67 | 63 | 63 |
| 255 | 131 | 127 | 127 |
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