"John Fields" schrieb im Newsbeitrag
...
On Thu, 24 Mar 2011 12:33:07 -0400, Bitrex
wrote:
I don't believe the bipolar 555 model included with LTSpice is
modeling the supply spikes accurately.
....
I've just posted a query to:
http://groups.yahoo.com/group/LTspice/
for clarification re. the accuracy of the model, and I'll post what
comes back as soon as I get it.
Maybe Helmut will post here first.
--
JF


Hello John,

The NE555 in the Misc-folder of LTspice may be just a gift from Mike.
I guess he made it because so many people asked for a 555.
LTC doesn't have a 555. So we can't expect that Mike spends
time to tweak the model for shoot-through current.

I tried a little bit with a capacitive load. Adding 100pF
to the output has given a significant current peak in the
power supply (V-source). Maybe this is a reasonable workaround
if somebody wants it more realistic..

Best regards,
Helmut