From: [email protected] <[email protected]> On Behalf Of Andy I
Sent: Sunday, July 16, 2023 5:38 PM
To: [email protected]
Subject: EXTERNAL: Re: : Re: : Re: [LTspice] PULSE default rise and fall times (Trise=0 Tfall=0) (was: ISL70444SEH declaration issue?)

?

Dave wrote, "Certainly slowed down the entire .TRAN period, though."

That should not have happened.? It should slow it down over only 1 ps of the 10 ms simulation -- so about 0.00000001% of it.

LTspice says it took about 0.4 seconds longer to simulate.? What did it do on your computer?

I wonder if we have run across another bug??? If you plot V(B), what do you see?

Anyway, just to clarify, when you wrote "but no longer works below 10ps!"? That's not quite true.? Your PULSE voltage source does have wicked fast rise and fall times down to 1 femtosecond or faster if you ask for them, but the internal Timestep isn't able to show it.? THAT is the issue, not the PULSE source.

Andy