Does your simulated variation in transistor delay match that
Does your simulated variation in transistor delay match that predicted by the equation? Comment on the possible causes of any difference? I = (µ.Cox.W / 2L)(Vg2)
| Wpmos | Wnmos | Ratio | High- Low Delay (ps) | Low- High Delay (ps) | Area High Low Delay | |
| Orginial Transistor | 20 | 10 | 2 | 17.994 | 17.841 | 32 x 82 |
| 10 | 10 | 1 | 25.02 | 11.963 | 32 x 82 | |
| 20 | 4 | 5 | 15.676 | 37.667 | 32 x 82 | |
| 10 | 1 | 10 | 15.848 | 80.356 | 32 x 82 | |
| 10 | 20 | 0.5 | 35.593 | 7.968 | 32 x 82 | |
| 5 | 20 | 0.25 | 60.002 | 6.887 | 32 x 82 | |
| 1 | 10 | 0.1 | 0.151 | 6.981 | 32 x 82 |
Solution
There is a small difference due to parasitIc components
