FreeLists / si-list / [SI-LIST] Re: PSPICE

[sdb@xxxxxxxxxx (Stuart Brorson)]

Something newbies often do is have a node with no DC path to ground.
For example, this occurs when you have an AC coupling cap in series
with an FET input op-amp.  (Why you would ever do that is a different
question).  Therefore, look at your circuit & make sure all AC coupled
nodes have DC paths to ground.  If you find one which is blocked by
capacitors, simply attach that node to ground through a 100 Meg
resistor.  This allows the SPICE engine to do its calculations.

As for floating GND, I have no idea what is causing that. 

Stuart

> 
> Hi,
> 
> I just started using Orcad Capture student. My schematic is just a
> simple example from a course homework to get used to capture and pspice.
> 
> I have one VPULSE that connect to a R C in series. But whenever I try to
> run the simulation I got the following messages 
> 
> 
> ERROR - Node xxxxx is floating
> ERROR - Node xxxxx is floating
> ERROR - Node GND is floating
> 
> I have verified over and over again that all my elements are connected
> by wires and in fact if I disconnect one of them I got an error message
> that is different (unconnected net)
> 
> Could someone help me with this problem ? I have checked all parameters
> but cannot figure out what this "floating" node mean.
> 
> Any help would be appreciated.
> 
> Thanks.
> 
> 
>               Pietro
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
> 
> or to administer your membership from a web page, go to:
> http://www.freelists.org/webpage/si-list
> 
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
> 
> List archives are viewable at:     
>               http://www.freelists.org/archives/si-list
> or at our remote archives:
>               http://groups.yahoo.com/group/si-list/messages 
> Old (prior to June 6, 2001) list archives are viewable at:
>               http://www.qsl.net/wb6tpu
>   
> 
> 

------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu