S. No | No. of Sources | No. of Switches | No. of Output Levels | ||
Symmetrical | Asymmetrical Binary | Asymmetrical Tertiary | |||
1. | 01 | 02 | 03 | 03 | 03 |
2. | 02 | 06 | 05 | 07 | 09 |
3. | 03 | 10 | 11 | 15 | 27 |
4. | 04 | 14 | 19 | 31 | 81 |