[SI-LIST] Re: broadcom Spice model
- From: "Kai Keskinen" <kalevi@xxxxxxxxxx>
- To: <peter.zhu@xxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Tue, 11 May 2004 17:56:16 -0400
Anyone who has Broadcom models legally has signed an NDA with them and
cannot give you the models. You have to deal with your Broadcom rep or FAE.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of peter zhu
Sent: Monday, May 10, 2004 10:07 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] broadcom Spice model
All:
We need broadcom's 567x and 569x spice model very urgently. We have signed
NDA with broadcom three weeks ago, but they made no respose until now. Our
PCB layout has been ceased for nearly one month because of no this model for
simulation.
Can anybody help me?
Peter
UTStarcom
----- Original Message -----
From: "npischl" <npischl@xxxxxxxxx>
To: <si-list@xxxxxxxxxxxxx>
Sent: Tuesday, March 02, 2004 2:43 AM
Subject: [SI-LIST] Re: EMC Issue at 266 MHz
> I would say it is certain that is does come from your clock. You see
> the 4th harmonic because even a slight deviation (<1%) from perfect
> 50% duty cycle results in strong even harmonics. In addition to the
> signals that are not perfectly symmetrical, the other contribution
> to emission may be (and probably is) related to power supply having
> strong 66.66 MHz components due to di/dt of the clocks.
>
> Neven
>
> --- In si-list@xxxxxxxxxxxxxxx, Jean_Pierre.Bouthemy@xxxx wrote:
> > Hi SI experts,
> >
> > I have a question regarding an EMC issue.
> > Our system has failed the EMC radiated emissions with a 266.6 MHz
> emission
> > +3dB above Class A gabarit !
> > We have many 66.66 MHz clocks in our system, made with 50MHz
> oscillator
> > feeding a PLL, whose 400 MHz VCO frequency divided by 6 gives
> 66.66 MHz.
> > My question is the following:
> > I could understand an emission at the odd harmonics:
> > - 66.66MHz x 3 = 200 MHz or,
> > - 66.66MHz x 5 = 333.33 MHz or,
> > - 66.66 MHz x 7 = 466.66 MHz or,
> > - so on ...
> >
> > But I don't understand why we have problem with the fourth
> harmonic : 66.66
> > MHz x 4 = 266.6 MHz !!
> > => Does anyone have an idea ?
> > => Is it possible the 266MHs emission doesn't come from our
> 66.66MHz
> > clocks?
> > => In this case wher could it be from?
> >
> > Thank you for your help.
> > Regards.
> >
> > Jean-Pierre Bouthemy
> >
> >
> > -------------------------------------------------------------------
> -
> > Jean-Pierre BOUTHEMY
> > Hardware Design Engineer
> > ALCATEL - Mobile Networking Division (MCG)
> > Mobile Core R&D
> > +33 (0)2 99 26 08 18
> > mailto:jean_pierre.bouthemy@xxxx
> > -------------------------------------------------------------------
> -
> >
> >
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