Okay. Thanks Helmut for the modifications.
Now this simulates quite fast.
?
Regards,
Vaseem
________________________________
From: Helmut <helmutsennewald@...>
To: LTspice@...
Sent: Friday, July 5, 2013 1:21 AM
Subject: [LTspice] Re: Slow simulation on new version of LTspice
?
--- In mailto:LTspice%40yahoogroups.com, mohd vaseem <vaseem_vlsi@...> wrote:
Hi experts,
I had been using LTspice version - 4.04r (Nov-2009)?to simulate my circuits.
Recently I updated the verion to latest - 4.16i and some of the circuits showed slower simulation speed as compared to previous version.
As an example -? the circuit under? -?? Files-> temp-> dc_dc_pfm.asc? used to take ~50sec to finisn 30ms simulation.
In the latest version it takes ~150sec, which is like 3 times slower.
The circuit is fairly simple having couple of switches to implement PFM.
Any ideas about the reason behind slowness ?
Could?it be due to any?new option added which I need to disable ???
Regards,
Vaseem
Hello Vaseem,
I haven't checked with an old version. I simply looked forward
and changed your circuit. The two AND-gates improved the sim-
speed by a factor of 1.5. The comparator improved it another
factor of 4. Over all it's now 6 times faster. I hope this helps.
Right-mouse-click on my digital devices to see their attributes.
Files > Temp > dc_dc_pfm_and.asc
Best regards,
Helmut
[Non-text portions of this message have been removed]
