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Re: Frequency

Tony Casey
 

<snip>
--- In LTspice@..., Ganesan <dg1@...> wrote:

Thanks ..Explains the RC case but not the RRcase.. Further 1ppm of 10k
is 100psec. My real frequency in more complex circuits are 100s of
megahertz.. That puts the steps size in the 10 femptoseconds.. Yikes...
There must be a better way..
</snip>
I think it explains everything once you consider that SPICE's automatic timestep algorithm is not exposed to the user, unless you override it.

Perhaps you can see why I questioned your use of SPICE in this context. The "better way" is to accept that SPICE is the wrong tool for this job.

Regards,
tony
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