I have a circuit which has piece-wise time varying period capacitance- how to simulate this type of circuit in OrCAD?
hi thanks for the reply
i looked in to VC_CAP and VPWL. I have one more doubt, VPWL has input for only 8 time instances , how to increase these and howto make it as a periodic source ? what wil be the VPWL value after T8 th time ?
got the concept. can we enter the time and voltage values in a simple text document or do we need to use any text editor ? how to upload this file to the VPWL_FILE source ? I tried through property editor of it, bt couldnt able to do it
And my Orcad doesnt has Spice_elem library(which has VAR_CAP) so I downloaded the library and added to the Orcad capture, so when I started to run the circuit I am getting an error ''ERROR(ORPSIM-15108): Subcircuit AWBVC_CAP used by X_U1 is undefined '', how to over come this ?
Thank you very much for your time, pease forgive me if I am troubling you.
Any editor that makes "plain" as apposed to "formatted" test will work, like Notepad, NOT Word. VPWL_FILE has a File property, this takes the full path and file name for the pwl file created, you can use .\pwlfile.txt to use a file called pwlfile.txt in the current directory.
It sounds like you have the graphical library, OLB, for the spice_elem, you need the simulation library, LIB, and then add it to the Simulation Profile libraries so that the simualtor can find it.