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From: Stefan Jahn <stefan@gr...>  20070123 07:15:53

Am Mo, 22.01.2007, 22:15, schrieb Pieter G: > Hi Stefan, Hello Pieter! > I would like to help with the implementation of the transient model. I > have read the doc technical.pdf. Since I have an engineering > background I am familiar with the concepts as discussed. > > Would someone be willing to give me pointers to where in the source I > can find/put the implementation? That would seriously speed up my > getting up and running :) I assume you read the sections about "frequency dependent" components in the time domain? About the convolution integral? I think the implementation of this should go into the qucscore/src/convolution.cpp qucscore/src/convolution.h files. The good news is that actually everything needed is already there: 1) a voltage/current history for component voltages/currents 2) FFT or DFT as you like So what we still need is now some functionality for a dispersive nport (so it can be applied to any component defined in the frequency domain) which computes the appropiate MNA entries. The frequency dependent Yparameters can always be computed using circuit>calcAC (frequency); Anyway, it is necessary to look through the code and understand the available functionality. You can always ask me when in doubt. :) Hope this helps, Stefan. 