[SI-LIST] Re: termination resistor
- From: XiaoLiang Tan <tanxiaoliang1987@xxxxxxxxx>
- To: bertsimonovich@xxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Mon, 24 Dec 2012 09:48:10 +0800
Hi, Bert Simonovich,
Thank you. Actually my driver is a integrated chain of inverters in
my chip. Thank you for your help.
Xiaoliang
On Mon, Dec 24, 2012 at 8:06 AM, Lambert Simonovich <
bertsimonovich@xxxxxxxxxx> wrote:
> Because the driver is a semi-conductor, it's output impedance could vary
> based on rising/falling edge transitions, manufacturing process (slow,
> typical, fast), and the load it is driving. One way to estimate the
> driver's
> impedance is by using an IBIS model of the device. Since IBIS models are
> ASCII based, you can simply use your favourite text editor to view and
> quickly estimate the output impedance when driving 50 Ohms by using two of
> the four V-T waveform tables.
>
> Here is the link to one of my blog postings, I did a while back titled,
> "Determining Output Impedance from IBIS".
>
>
> http://blog.lamsimenterprises.com/2010/12/22/drivers-output-impedance-from-i
> bis/
>
> Bert Simonovich
> LAMSIM Enterprises Inc.
> Web Site: http://lamsimenterprises.com
> Blog: http://blog.lamsimenterprises.com/
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On
> Behalf Of XiaoLiang Tan
> Sent: December-22-12 10:02 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] termination resistor
>
> Dear Expert,
> Hello, I am designing a high speed system.Since I don't know my
> driver's output resistance, thus the termination resistor value is not
> known. Thus may I use the variable resistor? If I use the variable
> resistor,
> the size is big thus I am unable to put all the resistor near the driver.(
> I
> have more than 10 outputs needs to be terminated). Which means the
> termination resistor could not be put close to the drivers.
> However, if I use a fixed and small size resistor, I need to trim
> the resistor manually when I doing the testing.
> So may I know that which one is more suitable? Thanks.
> --
> Best Regards
>
> ==================================
> *Xiaoliang, Tan*
> *
> *
>
>
> ------------------------------------------------------------------
> 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 forum is accessible at:
> http://tech.groups.yahoo.com/group/si-list
>
> List archives are viewable at:
> //www.freelists.org/archives/si-list
>
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2013.0.2805 / Virus Database: 2637/5976 - Release Date: 12/21/12
>
>
--
Best Regards
==================================
*Xiaoliang, Tan*
*Nanyang Technological University, Singapore*
*H/P: 93276589*
------------------------------------------------------------------
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 forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
