Re: PULSE default rise and fall times (Trise=0 Tfall=0) (was: ISL70444SEH declaration issue?)
¿ªÔÆÌåÓýI dug out the test case, and tried down into femtoseconds. Best I could get was 100fs for a setting of 100fs ? Dave ? From: [email protected] <[email protected]> On Behalf Of
Bell, Dave (US)
Sent: Friday, July 14, 2023 1:06 PM To: [email protected] Subject: EXTERNAL: Re: [LTspice] ISL70444SEH declaration issue? ? Andy wrote: ¡°Remember to never set Trise or Tfall to 0.? That signals SPICE (and LTspice) to substitute non-zero default values, and they won't be anywhere near 0.? It's a SPICE thing.¡± ? Indeed! I tried this a while back. 1ns yielded 1ns Tr and Tf 0 yielded 100us Tr and Tf 1p was too fast to zoom into, but jumping to marked data points, I got ¡ 1ps ? ? Dave ? |
Bell, Dave