oaPiElmore Class Reference

Inheritance diagram for oaPiElmore:

oaReducedModel oaDesignObject oaObject


Public Methods

void setNearCap (oaFloat value)
void setRes (oaFloat value)
void setFarCap (oaFloat value)
void setPiModel (oaFloat nearCap, oaFloat res, oaFloat farCap)
oaFloat getNearCap () const
oaFloat getRes () const
oaFloat getFarCap () const
void getPiModel (oaFloat &nearCap, oaFloat &res, oaFloat &farCap) const
oaCollection< oaElmore, oaPiElmore > getElmores () const

Static Public Methods

oaPiElmore * create (oaDesignObject *driver, const oaAnalysisPoint *ap, oaFloat nearCap, oaFloat res, oaFloat farCap)
oaPiElmore * find (const oaDesignObject *driver, const oaAnalysisPoint *ap)

Detailed Description

The oaPiElmore class represents a reduced model for the parasitics seen by a driver of a net, using a PI model and a set of Elmore delays to each receiver. The PI model consists of two capacitors and a resistor between them, with nearCap being the capacitor closer to the driver. The oaElmore class represents the Elmore delays, which are the first moment of the impulse response of the interconnect parasitics from the driver to each receiver.

Undo is not supported for oaPiElmore objects.

Member Function Documentation

oaPiElmore * oaPiElmore::create (  oaDesignObject *    driver,
const oaAnalysisPoint *    ap,
oaFloat    nearCap,
oaFloat    res,
oaFloat    farCap
)  [static]
 

This function creates a piElmore model for the specified driver object and analysis point. The driver can be terminal or instTerm in block or occurrence domain.

Exceptions:
oacInvalidReducedModelDomain 
oacInvalidReducedModelObjectType 
oacInvalidDriverTermType 
oacParasiticTermMustBeScalar 
oacParasiticInstTermMustBeScalar 

oaPiElmore * oaPiElmore::find (  const oaDesignObject *    driver,
const oaAnalysisPoint *    ap
)  [static]
 

This function finds the piElmore on the specified driver and analysisPoint. If found it returns the object, otherwise it returns null pointer to the caller.

oaCollection oaPiElmore::getElmores (    )  const
 

This function returns a collection of elmores for the receivers in this reduced model.

oaFloat oaPiElmore::getFarCap (    )  const
 

This function returns the value of the capacitor farthest from the driver in the PI model.

oaFloat oaPiElmore::getNearCap (    )  const
 

This function returns the value of the capacitor closest to the driver in the PI model.

oaFloat oaPiElmore::getPiModel (  oaFloat &    nearCap,
oaFloat &    res,
oaFloat &    farCap
)  const
 

This function returns the PI model values of this oaPiElmore.

oaFloat oaPiElmore::getRes (    )  const
 

This function returns the value of the resistor in the PI model.

void oaPiElmore::setFarCap (  oaFloat    value ) 
 

This function sets the value of the capacitor farthest from the driver in the PI model.

void oaPiElmore::setNearCap (  oaFloat    value ) 
 

This function sets the value of the capacitor closest to the driver in the PI model.

void oaPiElmore::setPiModel (  oaFloat    nearCap,
oaFloat    res,
oaFloat    farCap
) 
 

This function sets the PI model values for this oaPiElmore.

void oaPiElmore::setRes (  oaFloat    value ) 
 

This function sets the value of the resistor in the PI model.

The documentation for this class was generated from the following files:

Return to top of page




Copyright © 2002 - 2010 Cadence Design Systems, Inc.
All Rights Reserved.