Creating a "ground" type symbol

[kittmaster]

Is there a way to have a component that can "act" like a ground, vcc, vdd? It is understood that a connection to a ground symbol joins all object nets together even though there is no visible connection across a page or sheet. I want to build a component that acts the same way net and object wise. This will allow me to create multiple nets while keeping the sheet clean........can this be done in v10 or is a spice model required?

Any thoughts????

[lacy]

I have tried this before by taking a model and creating a component with some success. The model works and puts out the desired voltage, but I keep getting a pop-up error messsage about "Too few parameters in subciruit". The simulation continues even with this error poping up.

I am going to post a schematic with this power source on it. Save it to your user database (if it will allow it) and maybe you can take it further and adapt this to your application. Once you get this one source you can create other sources by just changing the model data to reflect the new voltage value.

Multisim won't allow modification of the master database power sources (other than changing the values in the dialog box) as they are considered interactive components. This means no copying or saving is possible.

Here are the two files. Note: The zip file I am going to upload contains a bunch of other models that you and other user may find useful. I was going to just post the one text file, but I think that this whole zip file may be useful in helping others in finding models.

[kittmaster]

I give it a look lacy.....thanks

basically I want to create two seperate circuits that can be built independantly within the same file and exported to UB to create two seperate boards within the same design without net list issues.....like a transmitter receiver......same design, one file, two seperate board outlines, zero interaction between the two.....but it has to start at the top of the pyramid.....:)

[lacy]

Good luck with that one. I am not sure that is going to be possible. Let us know if you actually are able to do this as I have not had any success with attempting something of this nature. Most of the time I have to simulate a design as one unit and then break it apart into 2 separte schermatic files and export them individually in order to get two separate boards.

This is situation presentented itself one other time and gave me an idea  I have already sent to NI. My idea was to have the Multipage in Multisim have the ability to export each individual page that way you could have one schematic and be able to simulate it as one unit and then transfer each indiviual page as a separate board.

I hope you can find a way to get this accomplished as I have no Idea on how to do other than what I have stated.

[gvan]

kittmaster,

You can do what you want, though not as easily as it should be.  Multiple grounds are very common, even on the same board.

Simply place a DGND Source component and then change the REFDES... to say GND2  You have to be careful not change the REFDES of all other DGND that you might have placed (you will be prompted to when you change the REFDES).   (For some reason, a GND (vs DGND) components is different and doesn't let you change the REFDES.

You also have to be careful that whenever you copy and paste this new GND2, the pasted one magically changes back to DGND without warning or permission. 

//rant..  All of the power components (VCC, VEE, GND) are a HUGE complaint of ours.  Why we are forced to use VCC, VEE, VDD as power supply names is beyond me and straight from the 1980's.  Changing the REFDES one at a time and having them change back when copied is huge time consumer and very error prone.  I would think that this would be a bigger problem for more people given that it is very common to have half a dozen or more power supplies and multiple ground planes on a board.    

Greg