Re: [SI-LIST] : SCSI-LVDS Models

Jim Freeman (freeman@mavericknetworks.com)
Mon, 28 Jun 1999 18:12:12 -0700

Hi Michael,
Before you throw out your receiver model, try and use a .ic statement to hold nodes at a value that you can pretty well qguess converges based upon the circuits. This will at least give the simulation a better starting point.

Jim Freeman

"Chan, Michael" wrote:

> Hi SI Guru:
> We are trying to do some Hspice simulations on SCSI bus to
> investigate signal quality. One problem that we encountered is the
> convergence
> problem of Hspice. We are still not sucessful in bringing the spice
> simulation to converge after we have tried different convergence aids as
> suggested in
> the Hspice manual. We plan to replace most of the receiver models with
> passive lumped models ( i.e. one resistor and one capacitor for CMOS input
> buffer ) and see whether this will help. Can anyone suggest what an
> equivalent model will be for a LVDS input receiver will be? Any suggestion
> will be appreciated.
>
> Regards,
> Michael Chan
> Compaq Computer Corp.
> Michael.Chan@compaq.com
>
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