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ISF in hspice (Read 2770 times)
raja.cedt
Senior Fellow
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Posts: 1516
Germany
ISF in hspice
May 18
th
, 2009, 7:29pm
hi,
can any body please tell me how to find Impulse sensitive function in hspice directly?I am trying to find isf by simply injecting impulse currents at different phase, but i am not getting correct ans.I am waiting for some one valuable reply.
Thanks,
Rajasekhar
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Geoffrey_Coram
Senior Fellow
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Posts: 1999
Massachusetts, USA
Re: ISF in hspice
Reply #1 -
May 19
th
, 2009, 5:03am
Isn't the trick with ISF that you have to inject a pulse that's big enough to not get lost in the numerical noise, but small enough that you don't kick the oscillator out of its orbit?
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If at first you do succeed, STOP, raise your standards, and stop wasting your time.
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raja.cedt
Senior Fellow
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Posts: 1516
Germany
Re: ISF in hspice
Reply #2 -
May 19
th
, 2009, 7:04am
hi
Geoffrey_Coram, thanks for your reply, how to decide the magnitude of the impulse?i heard that there is some direct method in hspice, if so can you please tell me how to do?
Thanks,
Rajasekhar.
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Geoffrey_Coram
Senior Fellow
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Posts: 1999
Massachusetts, USA
Re: ISF in hspice
Reply #3 -
May 20
th
, 2009, 4:25am
Perhaps you mean the
.ACPHASENOISE
feature? I did a search on SolvNet -- I haven't used this myself.
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If at first you do succeed, STOP, raise your standards, and stop wasting your time.
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