user defined capacitor with advanced analysis > Forums

Forums

Subject: user defined capacitor with advanced analysis

Posting to forums is available to community members only.
Login or Register

Rate this topic:

Author

Messages

keghie
Posts: 4
Online: User is Offline

5/16/2008 12:55 AM
Hello, i am trying to define a capacitor(let us call it ucap) with advanced analysis capability in Allegro HDL. For this purpose i have take a look on the structure and properties of the capacitor which is located in the pspiceelement library. The ucap symbol has now all the properties which are defined on the pspiceelement capacitor in part developer like TC,IC,NEGTOL,SLOPE,... When i run an analog simulation with this part, it is not recognized as advanced analysis part. I have read on sourcelink that all parts that all parts for the advanced analysis should be listed in the templates.prp file. My Questions are: -Does any one have experience in this topic(adding advanced analysis capability to R,L,C´s)? -Is it possible to change the content of the templates.prp file? and if yes which implications does that mind for the templates_prp.ind file? I would appreciate any response and thanks in advance

khurana
Posts: 17
Online: User is Offline

5/19/2008 2:18 PM
What type of Advanced Analysis simulation are you running? There are 4 kinds, namely, Optimize, Sensitivity, Monte Carlo, and Smoke. What exactly happens when you invoke AA simulation - can you provide the error, description of problem, etc.? Depending on the type of AA analysis you are running, the RLC will require different values. Most common ones are Tolerance, Distribution (for MC and Sensitivity), for Smoke you need to add other properties - all are defined in the PSpice AA User's Guide, accessible from Help menu.

keghie
Posts: 4
Online: User is Offline

5/19/2008 11:46 PM
thanks for the answer, i am actually running a smoke and optimizer analysis and when i invoke a transient with that part, it is recognised as a normal capcitor. But if i do an optimizer run for example, only the part from the pspice_elem are selctable from the parameters list. i have noticed also that in the netlist this part(C1) is the only part without the TC parameter *********************Netlist************************ C_C1 net_1_i4_b net_1_i7_b 100n R_R1 0 net_1_i4_b 1k TC=0,0 R_R4 0 net_1_i4_b 1k R_R2 net_1_i4_a net_1_i4_b 1k TC=0,0 R_R3 0 net_1_i7_b 1k TC=0,0 V_V1 net_1_i4_a 0 +SIN 0 10 50K 0 0 0 ***************************************************** here are screenshots of the associated symbol properties definition in the part developer and the attributes windows in DE HDL thanks

keghie
Posts: 4
Online: User is Offline

5/19/2008 11:49 PM
there was a mistake in the picture for the symbol properties. here is the right one.

khurana
Posts: 17
Online: User is Offline

5/20/2008 2:02 PM
So - is your problem concerned with C1 i.e. you are not able to select C1 for Optimizer? If yes, do you know for sure that the symbol for C1 is coming from the PSpice Advanced Analysis library? I use OrCAD Capture (not Allegro Design Entry HDL) so am not sure the name of the library that contains PSpice AA symbols but in OrCAD Capture/PSpice flow the PSpice AA library that contains capacitor is PSPICE_ELEM.OLB. May be you have the same name library for Allegro Design Entry HDL - make sure that the symbol for C1 is coming from that library and then see if you can add C1 for Optimization.

keghie
Posts: 4
Online: User is Offline

5/23/2008 8:12 AM
Hi, the point is that a simulation with AA is always possible with parts coming from the PSPICE_ELEM library. But my problem is that i don´t want to use those standard parts. Instead of that i want to associate AA capability to my own capacitor coming from my own library. I hope it is more precise now thanks

Posting to forums is available to community members only.
Login or Register

Forums > Silicon-package-board > PCB Design > user defined capacitor with advanced analysis