In the following figure, the properties of the different scaled input stages are shown. Like visible, the transistor current and length can be scaled in such a way that the different scaled transistors comply with the requirments.
Run | |||
---|---|---|---|
1 | 9.00e-04 | 2.74e-06 | 2.13e-03 |
2 | 7.00e-04 | 3.56e-06 | 3.25e-03 |
3 | 6.00e-04 | 4.18e-06 | 4.37e-03 |
4 | 4.00e-04 | 6.36e-06 | 1.25e-02 |
This figure gives the optimal value of the noise performance of the input stage. Indeed, the noise floor is below
Another advantage of this is that the
Since this simulation is done for a single-CS stage, the designed values need to be adjusted if a differential pair is used. Like mentioned, a differential pair will have the same noise characteristics as a CS stage with transistors that are twice as wide and a drain current that is twice as high. This means that the differential pair will have the following parameters:
Go to Assignment-5---Input-stage-design_index
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Last project update: 2022-01-13 18:09:51