Transcript Unit1: Modeling & Simulation Module3: Structural Modeling

Unit1: Modeling & Simulation
Module3: Structural Modeling
Topic: Interconnects Modeling
Introduction
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Interconnects are pieces of conducting wires deposited
on insulators.
Interconnects are those that connect different gates in
the circuit.
Interconnects have to be modeled in terms of R, L, C
They result in delay of the signals during their transient
analysis.
Modeling of interconnects
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Indicate delay as delay units on each interconnect.
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For more accurate evaluations, model the delay line by
an equivalent resistors and capacitors
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Reasonably good for small interconnects and medium
frequencies
Contd…
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For long interconnects, it must be broken into smaller
pieces and modeled as:
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Reasonably good for longer interconnects
Contd …
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Interconnect is essentially a distributed element similar
to transmission line.
Models will be as shown at fairly high frequencies.
 With these models one can simulate the voltage/current
– time characteristics or transient behavior of the
circuit.
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