8. Outlook

The techniques presented in this thesis allow for the solution of circuits using distributed devices for which the semiconductor equations need to be solved. Although these techniques delivered very promising results there is still room for further improvements. Possible improvements are listed in the following.

- Although the shunt conductance technique proposed in this thesis
delivered promising results for medium-sized circuits, operating point
calculations of larger circuits like the A709 are still not possible without
an initial-guess. Further improvements might still be possible considering
the purely empirical expression for the shunt conductance.
- Considering the thermal equivalent circuit for the A709 the simplicity is
striking. Only the principal effects can be covered with this extremely
simple circuit. It might therefore be desirable to automatically extract a
thermal equivalent circuit from available chip geometries to increase the
accuracy.
- For a good characterization of devices and circuits a proper implementation of small-signal analysis is of utmost importance. In the current version transit frequencies and capacitances have to be extracted using a transient analysis followed by a Fast Fourier Transformation (FFT). This procedure is extremely time consuming and nearly prohibitive for practical circuits.

1999-05-31