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Modeling >> Behavioral Models >> IBIS modeling
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Message started by tok47 on Mar 10^th, 2005, 3:11am

Title: IBIS modeling
Post by tok47 on Mar 10^th, 2005, 3:11am

Dear ALL,

Do any 1 familiar with IBIS modeling?

Do u know the purpose of GROUND CLAMP, POWER CLAMP, PULL-UP, PULL-DOWN, RISING WAVEFORM and FALLING WAVEFORM ?

Thanks

Title: Re: IBIS modeling
Post by jayanth.neo on Dec 1^st, 2007, 7:32pm

HI

Ibis model provides the analog characteristics of digital circuits that helps the users to simulate the design. IBIS modelling basically came into existence to protect the IP rights of a semiconductor vendor.

The IBIS model of a design only provides the characteristics of the device and hence it hides the internal design.

all the above characteristics are generic to a digital design the gnd and power clamp model provides the V/I characteristics of the gnd and power clamp diodes that might be present in the circuit.

the pullup and pull down curves provide the V/I characteristics of the pull up and the pull down transistors in the output pin( it depends whether ur output pin is a push/pull, open drain, open ECL or open sink type)

the rising and the falling waveforms provide the switching V/t characteristics of the output pin...

so u must understand about the device functionality before creating an IBIS model to develop a better model.....

more info can be found here :

http://www.eigroup.org/ibis/

SESHADRI