[ibis-macro] Re: IBIS-ATM teleconference - Agenda for 2/28/2012
- From: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
- To: IBIS-ATM <ibis-macro@xxxxxxxxxxxxx>
- Date: Tue, 28 Feb 2012 19:47:24 +0000
I wanted to find out the answer to the question we raised in the
last meeting about [External Model] ports. The question was
whether [External Model] was allowed to have user defined ports
so that an [External Circuit] could potentially be connected to
those.
I found this on page 108 of the v5.0 specification:
| Model units under [External Model] may only use reserved
| ports. The reserved, pre-defined port names are listed in the
| General Assumptions heading above. As noted earlier, digital
| and analog reserved port functions will be assumed by the tool
| and connections made accordingly. All the ports appropriate
| to the particular Model_type subparameter entry must be
| explicitly listed (see below). Note that the user may connect
| SPICE, Verilog-A(MS) and VHDL-A(MS) models to A_to_D and
| D_to_A converters using custom names for analog ports within
| the model unit, so long as the digital ports of the converters
| use the digital reserved port names.
The first sentence of this paragraph gives the answer to my question,
which is "NO". An [External Model] can only have the reserved ports,
except when there are A_to_D or _D_to_A converters involved, but even
then these converters must end up being connected to the digital
reserved nodes, which means that another [External Circuit] may not
be used to provide terminations to unused T-stone ports in [External
Model]s.
So if we want have a direct connect Touchstone S-parameter model in
an [External Model] (without an ISS wrapper), we have to provide all
termination definitions in the description of the [External Model]
keyword. This must include unused T-stone ports as well as the
ones which are connected to the terminals of the [External Model].
Thanks,
Arpad
========================================================================
-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx]
On Behalf Of Muranyi, Arpad
Sent: Tuesday, February 28, 2012 12:05 PM
To: IBIS-ATM
Subject: [ibis-macro] IBIS-ATM teleconference - Agenda for 2/28/2012
Time: February 28, 2012 Noon US Pacific Time
=====
Audio:
======
Voice dial-in: (800) 637-5822
International: +1 (647) 723-3937 <--- (For Canada)
0114501530 <--- (For Sweden)
0201400572 <--- (For Sweden Toll Free)
069509594672 <--- (For Germany)
08001014542 <--- (For Germany Toll free)
Access Code: 685-0440
Web
===
Click Here to Join Live Meeting:
http://tinyurl.com/yvmesj
or:
https://www.livemeeting.com/cc/sisoft/join?id=NKQQN3&role=attend&pw=TP8j%23-%25%7E5
Mentor Global Crossing Teleconference commands:
http://www.globalcrossing.com/customer/collaboration/cust_ready_access_tips.aspx
FIRST TIME USERS: To save time before the meeting, check your
system to make sure it is compatible with Microsoft Office Live
Meeting.
---------------------------------------------------------------------
Agenda
======
1) Opens
2) Call for any related patent disclosures
3) Review of ARs:
Arpad: Write a new revision of BIRD 117 and 118 to generalize
references to parameters in files (.ami or any)
- in progress
Any other AR-s?
Old ARs:
Arpad: Review the documentation (annotation) in the macro libraries.
- deferred until a demand arises or we have nothing else to do
4) New BIRD draft on Naming Rules (Walter)
- comments, questions?
5) Analog BIRDs discussion
- BIRD 117/118 revision to generalize parameter file references
- no update (Arpad)
- BIRD 144.2 Direct S-parameters under [External Model] (Cadence)
- define boundary conditions for unused nodes
- define boundary conditions for connected nodes
- does [External Model] allow additional nodes?
- BIRD 145 Cascading [Model] with [External Model] (Cadence)
- questions, comments?
- BIRD 116/144 related: need to decide what to do with the
isolation amplifier in the analog model boundary definition
- do we need these if we spell out in the spec that:
- Tx model is always driven by an ideal voltage source
- i.e. zero output impedance
- Rx model is always loaded by an ideal voltage source
- i.e. infinite input impedance
- BIRD 125 package modeling
BIRD 122 (Walter)
- working documents: ISS_Buffer_BIRD.doc (May 17, 2011)
ISS_Package_BIRD_RevA.doc (May 27, 2011)
6) BIRD 121.1, data management parameters (file support) (Walter)
- questions, comments?
7) BIRD 150, dependency table (Walter)
- questions, comments?
8) Info, Out, InOut BIRD (Arpad)
- latest wording includes "in order to be compliant with this
specification, Model_Specific parameters ... must not ...",
and omits the word "simulation" so it's meaning doesn't have
to be defined
- any comments, questions on this draft?
Thanks,
Arpad
=====================================================================
---------------------------------------------------------------------
IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/
IBIS Macro reflector: //www.freelists.org/list/ibis-macro
To unsubscribe send an email:
To: ibis-macro-request@xxxxxxxxxxxxx
Subject: unsubscribe
---------------------------------------------------------------------
IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/
IBIS Macro reflector: //www.freelists.org/list/ibis-macro
To unsubscribe send an email:
To: ibis-macro-request@xxxxxxxxxxxxx
Subject: unsubscribe
Other related posts:
