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Efficient simulation of high speed digital circuits using time adaptive FD-TD technique

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4 Author(s)
Ciampolini, P. ; Istituto di Elettronica, Università di Perugia, Perugia, Italy Ph. +39-75-5852658, Fax +39-75-5852654, e-mail: urlo@ing.unipg.it ; Mezzanotte, P. ; Roselli, L. ; Sorrentino, R.

A technique is proposed for increasing the computational efficiency of a mixed-mode FDTD ciruit simulator. The FDTD algorithm is coupled to a set of equations which describes both linear and non linear lumped elements. The simulation time step is adaptively adjusted by monitorng the convergence of the Newton-Raphson procedure adopted for the non-linear solution. This considerably speeds up the simulation, with respect to the adoption of a worst-case, fixed time step. The propagation of a high speed digital signal along a transmission lines is presented as an example. Simulation results are compared with SPICE outputs, showing excellent agreement.

Published in:

Microwave Conference, 1995. 25th European  (Volume:2 )

Date of Conference:

4-4 Sept. 1995