On Dec 28, 2007, at 1:40 AM, Clifford Wolf wrote:
Das Problem ist, dass ich da in der funktion ueber die ich integriere das integral von 0 bis x-dt verwende. Ideas or hints anyone?
I guess you already know this, but in case you need some hints, this is the first thing which comes to mind (I've long forgotten the math behind this though): You're obviously trying to solve a RC circuit. Since the voltage in question is dependant on the current going through the circuit, which again is dependant on the derivate of the voltage, you get a differential equation. Exactly how such software packages solve differential equations numerically, I don't know, but I guess you might have to specify the equation on some standard form for differential equations, not in form of an integral using it's own partial result. Alternatively, if you google a bit, you'll probably find the resulting exponential function and can substitute that one instead, unless this is part of a larger, more complicated circuit, and unless you're solving it numerically for some other reason. ..or ask Isis how to solve such differential equations analytically ;) ~/= Marius -- We are Elektropeople for a better living.