[SI-LIST] LVDS RECEIVER IBIS MODEL
- From: Peter LaFlamme <plaflamm@xxxxxxxx>
- To: si list <si-list@xxxxxxxxxxxxx>
- Date: Thu, 25 Jul 2002 11:08:38 -0400
Hi All,
I posed the question below to the ibis reflector and received a few responses.
I am unsure if any will work for sure.
I figured that there may be people on the SI reflector that would have
knowledge of how to implement this.
I appreciate any help you can offer.
Regards,
Peter
--
Peter LaFlamme
Applied Micro Circuits Corp.
System Applications Engineer
200 Minuteman Rd, 3rd Floor
Andover, MA 01810
978-247-8470 phone
978-623-0055 Fax
___________________________________________________________
Question:
I am tasked with creating an IBIS model for an LVDS receiver cell that has an
internal 100
ohm termination between the P and N nodes. I had asked Bob Ross about this a
while ago and
as usual he was very helpful. From his response I used the following
implementation:
|****************************************************************
| Component: LVDSRCV
|****************************************************************
|
[Component] LVDSRCV
[Manufacturer] AMCC
|
|
|
[Package]
| variable typ min max
R_pkg 1E-3 NA NA
L_pkg 1E-9 NA NA
C_pkg 1E-12 NA NA
|
[Pin] signal_name model_name R_pin L_pin C_pin
1 PAD lvdsrcv NA NA NA
2 PADN lvdsrcv NA NA NA
|
[Series Pin Mapping] pin_2 model_name function_table_group
1 2 rterm_100
|
[Diff_pin] inv_pin vdiff tdelay_typ tdelay_min tdelay_max
|
1 2 0.2 0 0 0
[Model] rterm_100
C_comp 0.1pF 0.1pF 0.1pF
Model_type Series
|variable R(typ) R(min) R(max)
[R Series] 100 80 120
[Temperature Range] 25.00 125.00 0.00
[Voltage Range] 1.800 1.650 1.950
****************************************************************************************
I was able to get the model past the IBIS checker but my simulations did not
show the 100
ohm terminator. I was using a tool which I believe does not support this
implementation
(no need to mention names). I have seen other implementations where I believe
a "Dynamic clamp" is used to model the termination behavior, but I am unsure.
Can anyone
guide me to some reference material or weigh in with your experience or help.
------------------------------------------------------------------
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 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:
