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I'm using 15.7 and I have resistor networks 0603x4.
I'm not able to properly generate xnets through these resistors. Is there such an issue or I'm not doing it properly?
First thing to check with xnet generation is the models create/assigned to the discrete devices - make sure the Res Pack has a espice model assigned to it. Res Pack models do not get created automatically when using the auto setup or auto generate button (back-end or front-end), so they need to be created seperately.make sure the Res Pack is of CLASS = DISCRETE, and the pins are PIN_TYPE=UNSPEC
so how do I choose or create an espice model for my resistor packs?
I think I figure it out.This is a sample of my resistor pack model.("RESNETX4_RNX4_68_68" ("ESpice" ".subckt RESNETX4_RNX4_68_68 1 2 3 4 5 6 7 8 R1 1 2 68R2 3 4 68R3 5 6 68R4 7 8 68.ends RESNETX4_RNX4_68_68") ("PinConnections" ("1" "2") ("2" "1") ("3" "4") ("4" "3") ("5" "6") ("6" "5") ("7" "8") ("8" "7") ))
I guess you are using Allegro PCB and not DEHDL (schematic)?Easiest way to create a Espice model for the Res Packs in Allegro PCB is to to use:-Analyze->SI/EMI Sim->Model (if using XL or SI Model Setup from Tools->Setup Advisor)Click on RefDes Pins tabFind the Res Pack and select itClick on Create Model and create a Espice model
I tried that, but then when I looked at the output I realized that something went wrong.What it did it created all the possible combination on the resistor pack. I just needed the combinations like 1-2 and 2-1. I don't know if that makes sense. Either way thanks for your help.
To create a resistor pack in the SI Model Assignment form;Consitering a 8-pin pack;with mapping of: 1-2, 3-4, etc. enter the pin numbers in order as 1 2 3 4 5 6 7 8with mapping of: 1-8, 2-7, etc. enter the pin numbers as 1 8 2 7 3 6 4 5With a common pin 8: enter 8 in the common pin field and the rest as 1 2 3 4 5 6 7With common pins 1 and 8: enter the pin numbers as 1 2 1 3 1 4 1 5 1 6 1 7 8 2 8 3 8 4 8 5 8 6 8 7After creating the model select the device and then Edit Model. Review the pin mapping in the Pin Connections section of the model, it should be obvious if anything is incorret.