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L_via Class Reference

A parameter that calculates the inductance of a via hole. More...

#include <via.h>

Inheritance diagram for L_via::

List of all members.

Public Methods
	L_via ()
	The default constructor creates a via hole of height=0 and diameter=0. More...
double	get () const
	Return the value of the inductance. More...
Public Attributes
parameter	D
	Hole diameter in standard units. More...
parameter	H
	Hole height in standard units. More...
Private Attributes
double	coeff
	The permeability of free space over 2 pi. More...

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Detailed Description

A parameter that calculates the inductance of a via hole.

Uses a semi-empirical formula from "Modeling Via Hole Grounds in Microstrip," Goldfarb and Pucel, IEEE Microwave and Guided Wave Letters, Vol. 1, No. 6, June 1991.

Parameters:

• D is the hole diameter
• H is the hole height

Useful ranges:

• Dielectric constant 2.2 < epsilon < 20
• 0.2 < D/H < 1.5
• 100 um < H < 635 um

Definition at line 62 of file via.h.

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Constructor & Destructor Documentation

L_via::L_via ( ) [inline]

The default constructor creates a via hole of height=0 and diameter=0. Definition at line 74 of file via.h.

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Member Function Documentation

double L_via::get ( ) const [inline, virtual]

Return the value of the inductance. A warning message will be displayed if H or D is outside its useful range. Reimplemented from abstract_real_parameter. Definition at line 83 of file via.h.

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Member Data Documentation

parameter L_via::D

Hole diameter in standard units. Definition at line 66 of file via.h.

parameter L_via::H

Hole height in standard units. Definition at line 69 of file via.h.

double L_via::coeff [private]

The permeability of free space over 2 pi. Set at construction. Definition at line 106 of file via.h.

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

• via.h

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