| Reference | No. of active building blocks | External resistors used | Is realization free from matching condition(s)? | Number of standard filter realized |
| [2] | 1 | 3 | NO | 5 |
| [4] | 1 | 4 | NO | 5 |
| [5] | 1 | 3 | NO | 5 |
| [6] | 1 | 2 | NO | 5 |
| [7] | 1 | 3 | NO | 5 |
| [8] | 3 | 5 | YES | 3 (LP, HP, BP) |
| [9] | 3 | 5 | YES | 3 (LP, HP, BP) |
| 2 | 3 | YES | 4 (LP, HP, BP, AP) | |
| 1 | 2 | YES | 4 (LP, HP, BP, AP) | |
| [10] | 1 | 2 | NO | 5 |
| Proposed | 1 | 2 | YES | 5 |