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atharapi

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Optical Simulation
Sep 03^rd, 2003, 3:25pm

Hello,

I am planning to use Cadence Spice or SpectreRF to design a transimpedance amplifier.

Question and subsequent problem is I do not know how to simulate eye diagrams, nor create them in Cadence.

If anyone has any experience or tips or resources for these types of simulations (high speed wireline I suppose), please let me know.

Thank you for your time and have a great day !

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Andrew Beckett

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Life, don't talk to
me about Life...

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Bracknell, UK

Re: Optical Simulation
Reply #1 - Sep 3^rd, 2003, 10:30pm

In IC50 the Calculator in the Analog Design Environment
has a "Special Function" for doing eye diagrams.

If you're using an earlier version, I can send you my SKILL
code to do the same thing.

These allow a transient waveform to be displayed as
an eye diagram.

Also, there is a behavioural model in ahdlLib or rfLib (I'm
not sure which off the top of my head) which can
be used to plot an eye diagram by using one of its outputs
as the X axis.

Regards,

Andrew.

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kdsakamoto

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Re: Optical Simulation
Reply #2 - Sep 9^th, 2003, 6:27pm

[quote author=Andrew Beckett link=1062627936/0#1 date=1062653456]In IC50 the Calculator in the Analog Design Environment
has a "Special Function" for doing eye diagrams.

If you're using an earlier version, I can send you my SKILL
code to do the same thing.

[/quote]

Andrew,

I would be interested in the skill code too. Have to use Cadence for a new design (all our past simulation were done on Mentor).

Thanks,
Kurt
kdsakamoto@cs.com

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CDR Junior Member Offline Posts: 18	Re: Optical Simulation Reply #3 - Oct 22^nd, 2003, 8:13pm Andrew please send me too.
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Paul Community Fellow Offline Posts: 351 Switzerland	Re: Optical Simulation Reply #4 - Oct 23^rd, 2003, 12:20am I would be interested in Andrew's code too, as many others, I believe. Could you provide it as "contributed paper" on this web site? Paul
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Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: Optical Simulation Reply #5 - Oct 25^th, 2003, 6:23am Paul, That's the plan. Ken already sent me the template to do this - it's just a matter of me finding a free moment to do this. Won't be in the next week as I'm on vacation, but it's still in my list of things to do... Andrew.
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Thomas Guest	Re: Optical Simulation Reply #6 - Feb 15^th, 2005, 2:25am I would also like to have the code, please! My e-mail is t_stoll@gmx.net Thanks in advance, tOM
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Andrew Beckett

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Life, don't talk to
me about Life...

Posts: 1742
Bracknell, UK

Re: Optical Simulation
Reply #7 - Feb 17^th, 2005, 1:28am

Sorry, I never got around to writing this up - it seemed a little pointless since IC446 is no longer supported, and eyeDiagram is available as a special function in IC50 onwards.

So my recommendation is to use IC5033 or IC5141 which have this function built in. Also, wavescan (the new waveform tool) has the ability to do this natively (double-click on the x-axis, and you can tell it the period to do the eye-diagram over).

Regards,

Andrew.

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