"Melanie Nasic" schrieb im Newsbeitrag news:do94fl$3kv$ snipped-for-privacy@mamenchi.zrz.TU-Berlin.DE...
Hi,
>
> recently I was assigned with the job to design a Printed Circuit Board (PCB)
> which does a kind of analog signal formatting through on-board designed
> capacitances, inductances and resistances. These components must be designed
> not as discrete components (SMD, etc.) but deliberately as stray
> capacitances in the form of specially layouted transmission line segments
> and 3D arrangements. The material of the PCB is predefined to be FR4.
> Surely I can design the circuit with tools like PSpice etc. but when it
> comes to design the calculated R, L, C values on the PCB I'm out of luck
> with my tools. So my question is: Is there a tool (Mentor?) which contains
> both circuit simulation AND PCB layout where I can design my defined
> capacitances, inductances and resistances in the form of specially routed
> transmission lines? What would be the best way to perform that task, anyway?
> In my opinion it must be an iterative process. Has anyone experience in this
> particular application field? Any help, suggestions and examples (maybe)
> would be appreciated.
>
> Many thanks in advance and best regards,
>
> Melanie
Hello Melanie,
I am sure that nobody wants to make R with the PCB-Traces. It may be Z(transmission line impedance) but never R. L and C can be stubs for example or other odd shapes along the "main" trace.
Please give a clear example(with numbers) what you have to design. All the postings so far are pure speculations about your real task. It's your turn to make the picture more clear.
Best regard, Helmut