Arpad,
Todd Westerhoff VP, Software Products SiSoft 6 Clock Tower Place, Suite 250 Maynard, MA 01754 (978) 461-0449 x24 twesterh@sisoft.com www.sisoft.com
Absolutely! However, from the question I got the impression that Nitin wanted to do this in the analog world, and AMI is an algorithmic solution... Arpad =========================================== -----Original Message----- From: Todd Westerhoff [mailto:twesterh@sisoft.com] Sent: Wednesday, July 22, 2009 10:10 AM To: Muranyi, Arpad Cc: ibis@eda.org; si-list@freelists.org Subject: Re: [IBIS] RE: [ibis-macro] IBIS model of drifferential driver with programmable multi-tap preemphasis Arpad, .... or they could use IBIS-AMI, as this is what it was designed for. Todd. Todd Westerhoff VP, Software Products SiSoft 6 Clock Tower Place, Suite 250 Maynard, MA 01754 (978) 461-0449 x24 twesterh@sisoft.com www.sisoft.com Muranyi, Arpad wrote:Nitin, If you have access to the stimulus, you could pull this off with the Driver Schedule or even without it, but that would be a semi official IBIS solution because it may not work in all tools. For example, if you do it with the HSPICE B-element, you could make a B-element for each stage of your buffer, and then make a special stimulus generator which reproduces the bit pattern dependent waveforms for the input to each B-element (buffer stage). This way the stages of your buffer would still be IBIS models, but the relationship between them would be outside the IBIS world. Another way to do it would be to use the *-AMS extensions of IBIS. This way you could make a completely official model for the entire buffer. However, not all IBIS tools have implemented the *-AMS extensions of IBIS, although there are several tools with Verilog-A support which may be sufficient for what you want to do. I hope this helps. Arpad =============================================================== -----Original Message----- From: ibis-macro-bounce@freelists.org [mailto:ibis-macro-bounce@freelists.org] On Behalf Of Nitin Kumar CHHABRA Sent: Wednesday, July 22, 2009 7:14 AM To: ibis@server.eda.org; si-list@freelists.org Cc: vishrant.goyal@st.com; nitin.chhabra@st.com; nitin.gupta@st.com Subject: [ibis-macro] IBIS model of drifferential driver with programmable multi-tap preemphasis Hi experts, We want to develop the IBIS model for a differential driver with pre emphasis . The driver has three tap with programmable pre emphasis options. Does anyone came across such IBIS or could provide some IDEA how to proceed for the same. Using Driver Scheduling, we are able to make model for first tap pre emphasis buffer. But we cannot accommodate the second and third tap options as they require previous bit histories. with regards, Nitin --------------------------------------------------------------------- IBIS Macro website : http://www.eda.org/pub/ibis/macromodel_wip/ IBIS Macro reflector: http://www.freelists.org/list/ibis-macro To unsubscribe send an email: To: ibis-macro-request@freelists.org Subject: unsubscribe
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