how to define a pins floating status?

[Areky_qin]

hi, guys, when u simulation your schematics, how to define a pins floating status?
you know, if a pins is floating, then hspice can report error information for there is no dc path from this pin to GND, then how to define this status? used a large resistors or cap?and what's the status of this pin? or an uncertain status? how do this status influence the circuit system?

Regards

Areky Qin

 

[niklas.zhu]

None DC path doesn't because of floating pins in most cases.
for DC path problem, i always put 1Gohm resistance to ground, however, in some cases, you should be careful with this connection, since it may lead to strange results.

i don't think it is a big problem for floating pins, because simulator can tolerate floating pins if it doesn't affect the circuit