From: Stefan Jahn <stefan@gr...>  20070125 10:01:08

Am Do, 25.01.2007, 10:43, schrieb Takao Komatsuzaki: > Hi Stefan, Hello Takao! > thanks. So, the advantage at Qucs is to handle the linear parts > against the timedomain SPICE. The handling nonlinear part is > almost same, right ? Again I am not sure what you meant. :( The main technical difference between SPICE and Qucs may be that Qucs currently supports 1) certain RF components which SPICE does not have and vice versa 2) direct Sparameter analysis I am not sure what "the advantage at Qucs is to handle the linear parts against the timedomain SPICE" means.... > Linear parts are linear in time as well frequency domain (e.g. resistor) Cheers, Stefan. >>> I have a basic question about Qucs. >>> >>> When it simulates the circuitry which composed of linear parts and >>> nonlinear parts. how does Qucs handle nonlinear parts ? >> >>It depends. >> >>In the smallsignal frequency domain nonlinear parts are previously >>linearized using DC analysis (operating point). >> >>Nonlinear analysis is done using NewtonRaphson and derivatives. >> >>> Does it translate the model description into other format like that >>> at the frequency domain ? >> >>I am not sure what you are asking for? >> >>> Do you support Bsim series ? >> >>No, not yet. :( 