The example is a simple MOS gain stage.
The circuit consists of an AC coupled common source stage. The circuit is biased using a current mirror.
The 3dB cutoff frequency of the circuit can be calculated using equation (1):
| (1) |
The simulation results are summarised in table 1.
| Parameter | Spec | Result | Unit | Pass | ||||
|---|---|---|---|---|---|---|---|---|
| Min | Typ | Max | Min | Typ | Max | |||
| AC simulation | ||||||||
| AC gain | 17 | 25 | 19.7 (slow) | 20.5 | 21.9 (fast) | dB | ||
| 3dB Bandwidth | 0.9 | 0.88 (slow) | 1.04 | 1.29 (fast) | GHz | FAIL | ||
| DC simulation | ||||||||
| Supply DC current | 0.19 (slow) | 0.21 | 0.23 (fast) | mA | ||||