Re: [SI-LIST] : FW: Spectraquest Vs. XTK/XNS

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From: Donald Telian (donaldt@cadence.com)
Date: Tue Sep 26 2000 - 08:45:27 PDT


John,

Answers for SPECCTRAQuest are below.

Thanks for asking,
Donald T.
CADENCE

At 01:48 PM 9/25/00 -0400, May, John wrote:
>
>
>> -----Original Message-----
>> From: May, John
>> Sent: Monday, September 25, 2000 1:20 PM
>> To: 'si-list@silba.eng.sun.com'
>> Subject: Spectraquest Vs. XTK/XNS
>>
>> Hi all - My group is looking into purchasing one of these tool suites for
>> SI analysis. I'm wondering what the tradeoffs and limitations of each are.
>> For instance:
>>
>> 1) Can botth suites handle HSPICE models in a mixed environment with IBIS
>> models?
>>

SPECCTRAQuest uses an optimized spice engine for analysis. As such, all
types of spice models can be used with the exception of transistor-based
models (M elements). Naturally, IBIS models can be used as well. If you
want to use both IBIS and transistor-level IO models, we have a netlist
converter that will translate our proprietary spice netlist (extracted from
PCB layouts or topology drawings) into a variety of other spice formats.

>> 2) Do either of the tools have trouble with differential inputs(high and
>> low inputs used with a differential receiver)?
>>

SPECCTRAQuest has support for differential drivers and receivers.

>> 3) Connector stitching: How easy is it to use these tools for going
>> through connectors to model paths that traverse multiple modules?
>>

It is quite simple to join multiple board layout files together in
SPECCTRAQuest for simulation. And that includes package layout (.mcm)
files as well. A variety of connector or cable models can be easily placed
between the boards. The simplest being RLC or RLGC representations, but
fully-coupled connector models can also be integrated into the simulation.
This normally requires some re-formatting of the data from the connector
vendor, but it is not too hard to do assuming you understand how to build
and call spice subcircuits.

>> John
>
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>
>
Donald Telian
Cadence Design Systems
phone: 408-944-7791
donaldt@cadence.com

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