FreeLists / si-list / [SI-LIST] Re: (no subject)

["Ingraham, Andrew" <Andrew.Ingraham@xxxxxx>]

> here are some of the reasons why the DC and transient waveforms
differ.
> 1) If spice doesnot converge properly in either DC or transient
simulations
> the mismatch could occur.
> 2) This is a multistage driver, and it is not modeled properly.
> 3) There could be package effects in the transient curves
 
A 4th possible reason: V-T curves don't go out far enough in time to
include all of the transient.  1.45V is the predicted "final" voltage.
Maybe it only reached 1.20V where the V-T table was truncated.

Too bad the checker doesn't compute error as a percentage of signal
swing, rather than of absolute voltages.  Compared to 0.00V, anything
would look huge (i.e., 54 million percent), but 0.01V is darned close to
insignificant.  The other error, though (1.20V vs. 1.45V) is
significant.

Andy



------------------------------------------------------------------
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