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ISF in hspice (Read 2772 times)

raja.cedt Senior Fellow Offline 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 Offline 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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raja.cedt Senior Fellow Offline 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 Offline 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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