4. Simulator Coupling

Several works dealing with circuit simulation using distributed devices have
been published so far [40,49,12,39]. Most publications
deal with the coupling of device simulators to *SPICE*. This results in a
two-level Newton algorithm since the device and circuit equations
are handled subsequently. Each solution of the circuit equations gives a new
operating point for the distributed devices. The device simulator is then
invoked to calculate the resulting currents and the derivatives of these
currents with respect to the contact voltages. The other approach is called
full-Newton algorithm as it combines the device and circuit
equations within one single equation system. This equation system is then
solved applying Newton's algorithm. In contrast to the two-level
Newton algorithm where the device and circuit unknowns are solved
in a decoupled manner, here the complete set of unknowns is solved
simultaneously.

- 4.1 The Two-Level Newton Algorithm
- 4.2 The Quasi Full-Newton Algorithm
- 4.3 The Full-Newton Algorithm

1999-05-31