bondwire.cpp File Reference

Implement a bondwire model. More...

#include "component.h"
#include "substrate.h"
#include "bondwire.h"

Go to the source code of this file.

Data Structures
struct	modeltable_t
class	bondwire

Macros
#define	TABLE(x)   { #x, x }
#define	ARRAY_SIZE(x)   (sizeof(x) / sizeof((x)[0]))

Enumerations
enum	bondwiremodel { FREESPACE, MIRROR, DESCHARLES }

Functions
static nr_double_t	skindepth (const nr_double_t f, const nr_double_t rho, const nr_double_t mur)
static nr_double_t	correctionfactor (const nr_double_t f, const nr_double_t d, const nr_double_t rho, const nr_double_t mur)

Variables
static const modeltable_t	modeltable []
	PROP_REQ []
	PROP_OPT []

Detailed Description

Implement a bondwire model.

Bibliography:

[1] Microwave Solid State Circuit Design, Inder Bahl and Prakash Barthia – 2nd edition 2003 - Wiley interscience ISBN 9-471-20755-1

[2] Wikibook Electronics/Inductors http://en.wikibooks.org/w/index.php?title=Electronics/Inductors&oldid=497883 online 2006/11/02

[3] Physical and electrical modeling of bonding wires up to 110 GHz, Descharles, C. Algani, C. Mercier, B. Alquie, G. Microwave Conference, 2003. 33rd European Volume: 2, On page(s): 639- 642 vol.2 ISBN: 1-58053-834-7 INSPEC Accession Number: 1262971

Definition in file bondwire.cpp.

Macro Definition Documentation

#define ARRAY_SIZE

(

x

)

(sizeof(x) / sizeof((x)[0]))

array size

Definition at line 67 of file bondwire.cpp.

#define TABLE

(

x

)

{ #x, x }

create a matching table between model number and string

Definition at line 65 of file bondwire.cpp.

Enumeration Type Documentation

enum bondwiremodel

bondwire model number

Enumerator
FREESPACE	fresspace model
MIRROR	mirror plane model
DESCHARLES	Descharles Algani Mercier Alquie model

Definition at line 70 of file bondwire.cpp.

Function Documentation

static nr_double_t correctionfactor ( const nr_double_t  f, const nr_double_t  d, const nr_double_t  rho, const nr_double_t  mur  )

static

Compute correction factor. According to [1] pp63 (2.30a-b) correction factor is such as:

where is the well known skin depth.

Parameters

f	frequency
d	bond wire diameter
rho	bond wire resistivity
mur	relative magnetic permeabillity

However according to [2] it seems that the author of [1] do the assumption of therefore rewrite the equation such as:

Returns

mur/4 if rho is zero, otherwise C

Todo:

Check domain validity for round C factor.

Definition at line 198 of file bondwire.cpp.

static nr_double_t skindepth ( const nr_double_t  f, const nr_double_t  rho, const nr_double_t  mur  )

static

Compute skin depth.

Todo:

Factorize the compution of skin depth in a header file.

Parameters

f	frequency
rho	bond wire resistivity
mur	relative magnetic permeabillity

Definition at line 143 of file bondwire.cpp.

Variable Documentation

const modeltable_t modeltable[]

static

Initial value:

= {
  TABLE(FREESPACE),
  TABLE(MIRROR),
}

model number to string matching table implementation

Definition at line 83 of file bondwire.cpp.

PROP_OPT[]

Initial value:

= {
  { "Temp", PROP_REAL, { 26.85, PROP_NO_STR }, PROP_MIN_VAL (K) },
  PROP_NO_PROP }

Definition at line 431 of file bondwire.cpp.

PROP_REQ[]

Initial value:

= {
  { "D", PROP_REAL, { 25e-6, PROP_NO_STR }, PROP_POS_RANGE },
  { "L", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE },
  { "H", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGE },
  { "mur", PROP_REAL, { 1, PROP_NO_STR }, PROP_RNGII (1, 100) },
  { "rho", PROP_REAL, { 0.022e-6, PROP_NO_STR }, PROP_POS_RANGE },
  { "Model", PROP_STR, { PROP_NO_VAL, "FREESPACE" },
    PROP_RNG_STR3 ("FREESPACE", "MIRROR", "DESCHARLES") },
  { "Subst", PROP_STR, { PROP_NO_VAL, "Subst1" }, PROP_NO_RANGE },
  PROP_NO_PROP }

Definition at line 421 of file bondwire.cpp.