[SI-LIST] Re: Quick switch
- From: "Mikhail Matusov" <matusov@xxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Fri, 30 May 2008 09:55:04 -0400
Scott,
There are some switches designed for the purpose with good grounding. One
example is Pericom PI3L301D, which I believe is a copycat of a TI device
with a similar part number...
=======================
Mikhail Matusov
Senior Hardware Design Engineer
Square Peg Communications
Tel.: +1 (613) 271-0044 ext.231
Fax: +1 (613) 271-3007
http://www.squarepeg.ca
----- Original Message -----
From: "Scott McMorrow" <scott@xxxxxxxxxxxxx>
To: "steve weir" <weirsi@xxxxxxxxxx>
Cc: <ravi.potana@xxxxxxxxx>; <si-list@xxxxxxxxxxxxx>
Sent: Friday, May 30, 2008 9:19 AM
Subject: [SI-LIST] Re: Quick switch
> Ravi
> To follow on with what Steve has said, most FET switch packages do not
> have adequate package grounding. Since the substrate is normally
> grounded, this poses a problem, since there is parasitic capacitive
> coupling between each switch and the substrate. These are fairly easy
> devices to model in SPICE, and many manufacturers provide accurate
> models. IBIS models, however, cannot adequately model these devices.
>
> regards,
>
> Scott
>
> Scott McMorrow
> Teraspeed Consulting Group LLC
> 121 North River Drive
> Narragansett, RI 02882
> (401) 284-1827 Business
> (401) 284-1840 Fax
>
> http://www.teraspeed.com
>
> Teraspeed® is the registered service mark of
> Teraspeed Consulting Group LLC
>
>
>
> steve weir wrote:
>> An NFET or CMOS switch in a package has parasitics like any other
>> device. If you model and work within the limitations of those
>> parasitics you shouldn't have any unwelcome surprises. If you pretend
>> that the device is without parasitics you can easily make designs that
>> run into problems.
>>
>> Steve
>> ravi.potana@xxxxxxxxx wrote:
>>
>>> Hello All,
>>>
>>> Please let me know if anyone has used Quick switch (FET based) on clock
>>> with frequency 125MHz for muxing operations and seeing any SI issues on
>>> the clock line after passing through the FET Switch.
>>>
>>> regards
>>> Ravi
>>> Please do not print this email unless it is absolutely necessary.
>>>
>>> The information contained in this electronic message and any attachments
>>> to this message are intended for the exclusive use of the addressee(s)
>>> and may contain proprietary, confidential or privileged information. If
>>> you are not the intended recipient, you should not disseminate,
>>> distribute or copy this e-mail. Please notify the sender immediately and
>>> destroy all copies of this message and any attachments.
>>>
>>> WARNING: Computer viruses can be transmitted via email. The recipient
>>> should check this email and any attachments for the presence of viruses.
>>> The company accepts no liability for any damage caused by any virus
>>> transmitted by this email.
>>>
>>> www.wipro.com
>>>
>>> ------------------------------------------------------------------
>>> To unsubscribe from si-list:
>>> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>>>
>>> or to administer your membership from a web page, go to:
>>> //www.freelists.org/webpage/si-list
>>>
>>> For help:
>>> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>>>
>>>
>>> List technical documents are available at:
>>> http://www.si-list.net
>>>
>>> List archives are viewable at:
>>> //www.freelists.org/archives/si-list
>>> or at our remote archives:
>>> http://groups.yahoo.com/group/si-list/messages
>>> Old (prior to June 6, 2001) list archives are viewable at:
>>> http://www.qsl.net/wb6tpu
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>
>
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>
> List technical documents are available at:
> http://www.si-list.net
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List technical documents are available at:
http://www.si-list.net
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
