[SI-LIST] Re: trouble simulating with AC coupling capacitors in topology

Hi Roopesh,
I have faced similar problem in the past and went to cadence for the 
support but did not worked out. With the AC caps in the cadence the P 
and N waveforms will not come as expect. Later I simulated using HSPICE 
with initial condition settings or else you need to run a long bits for 
the settled waveforms.

Regards
Pugal


________________________________
From: Roopesh Badala <roopesh.badala@xxxxxxxxx>
To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
Sent: Friday, 8 July 2011 4:54 PM
Subject: [SI-LIST] trouble simulating with AC coupling capacitors in topology

Hi All,
I am trying to simulate a topology which has AC coupling capacitors in it.

Using Cadence Allegro PCB SI tool set , i am unable to get the expected
output.

but when I simulate the same topology by removing the AC coupling capacitors
in signal path, I get a perfect waveform.

Is this a tool limitation..? can some body suggest me if they have faced
similar issue.


Thank you

Roopesh


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