Noise from a BJT

noiseex04.in : Noise from a BJT

Requires: S-Pisces/Noise
Minimum Versions: Atlas 5.22.1.R

This example looks at the internal procedures which are used to calculate the noise.

A silicon BJT modeled and a DC operating point is set.

We use the noise.all keyword on the output command to tell Atlas to save the noise parameters to the structure file.

The Impedance Field is a simple Green's function. The Impedance Field (IF) at some point is the voltage which would appear on an open circuit contact if a unity current were injected at that point. For a two port device there are four Impedance Fields: the port one IF for electron current, the port one IF for hole current, the port two IF for electron current, and the port two IF for hole current.

The Microscopic Noise Source (MNS) is the amount of noise generated by the volume of the device surrounding a node. There is an MNS for each type of noise.

The Local Noise Source (LNS) is the amount of noise generated on a contact by the volume of the device surrounding a node. It is calculated by using an IF to translate the MNS into a contact voltage.

To load and run this example, select the Load example button in DeckBuild. This will copy the input file and any support files to your current working directory. Select the run button to execute the example.