There could be a lot of reasons for your problems. No one can answer your question from what you've told us. See the si-list.org FAQ related to transient convergence problems for some discussion and common fixes: http://si-list.org/wiki/wiki.pl?Hspice_DC_And_Transient_Convergence_Problems -Ray manish bhakuni wrote: > >hello ppl out there >im trapped in simulation of some circuits in HSPICE. >it gives me negative mos conductance and internal time step too small for >transient analysis. plz tell me the reason fot these and there solution. >plz also tell me where i can find good tutorials on HSPICE. > >yours sincerely > > . ------------------------------------------------------------------ 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: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //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