How to remove this wiggle?

Hi All,

I am currently testing this simple open loop SR buck and I am wondering if there is any way to absolutely remove the tiny wiggle at the output?
I tried ttol=0.1ns and also disable fast math option, but it remains.
open loop.qsch (16.3 KB)

and if I remove the deadtime circuit, it even makes this weird sudden ringing

Arief

Replied 1

I have asked Mike, his suggestion is to limit maxstep down to 10ns…

Which works, but super slow…will appreciate for any suggestion…

Replied 2

I asked about how to do it without making the sim slow?

The suggestion is… use C-block…

Ok… I will need to deal with Trunc() and everything again to solve this

Try this

  • change time_tol=1p (i.e. TTOL=1p)
  • .option trtol2=0

open loop - 3.qsch (16.3 KB)

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