#include <bondwire.h>

Inheritance diagram for bondwire:

Collaboration diagram for bondwire:

Public Member Functions
	CREATOR (bondwire)
void	initSP (void)
void	calcSP (const nr_double_t)
void	calcNoiseSP (nr_double_t)
void	initDC (void)
void	initAC (void)
void	calcAC (nr_double_t)
void	calcNoiseAC (nr_double_t)
qucs::matrix	calcMatrixY (nr_double_t)
void	saveCharacteristics (nr_double_t)
Data Fields
	BOND
	PROP_COMPONENT
	PROP_NO_SUBSTRATE
	PROP_LINEAR
Private Member Functions
void	getProperties (void)
	Get properties from model. Get properties and fill the class.
nr_double_t	resistance (const nr_double_t f) const
nr_double_t	Lfreespace (const nr_double_t f) const
nr_double_t	Lmirror () const
Private Attributes
nr_double_t	l
nr_double_t	d
nr_double_t	h
nr_double_t	rho
nr_double_t	mur
int	model
nr_double_t	R
nr_double_t	L
nr_double_t	temp

Detailed Description

Definition at line 434 of file bondwire.cpp.

Member Function Documentation

void bondwire::calcAC ( nr_double_t frequency ) [virtual]

Compute AC model. ! Use serial LR model (Y matrix).

Reimplemented from qucs::circuit.

Definition at line 399 of file bondwire.cpp.

matrix bondwire::calcMatrixY ( nr_double_t f )

Compute Y matrix of bond wire.

Definition at line 314 of file bondwire.cpp.

void bondwire::calcNoiseAC ( nr_double_t ) [virtual]

Reimplemented from qucs::circuit.

Definition at line 411 of file bondwire.cpp.

void bondwire::calcNoiseSP ( nr_double_t ) [virtual]

Reimplemented from qucs::circuit.

Definition at line 403 of file bondwire.cpp.

void bondwire::calcSP ( const nr_double_t frequency ) [virtual]

Compute S parameters. ! Reuse computed Y matrix.

Reimplemented from qucs::circuit.

Definition at line 353 of file bondwire.cpp.

bondwire::CREATOR ( bondwire )

void bondwire::getProperties ( void ) [private]

Get properties from model. Get properties and fill the class.

Todo:: check values

Definition at line 94 of file bondwire.cpp.

void bondwire::initAC ( void ) [virtual]

Initialize AC simulation.

Reimplemented from qucs::circuit.

Definition at line 390 of file bondwire.cpp.

void bondwire::initDC ( void ) [virtual]

DC model initialization. ! DC model of a bondwire is a resistance.

Reimplemented from qucs::circuit.

Definition at line 366 of file bondwire.cpp.

void bondwire::initSP ( void ) [virtual]

Initialize S parameter simulation.

Reimplemented from qucs::circuit.

Definition at line 345 of file bondwire.cpp.

nr_double_t bondwire::Lfreespace ( const nr_double_t f ) const [private]

Compute free space inductance. According to [1] pp63 (2.29) free space inductance (in nH) is such as ( $l$ in micrometers):

$L = 2\times10^{-4} l \left[ \ln\left\{ \frac{2l}{d} + \sqrt{1 + \left(\frac{2l}{d}\right)^2} \right\} + \frac{d}{2l} - \sqrt{1+\left(\frac{d}{2l}\right)^2} + C \right]$

According to [2] self inductance is (in H with l in m):

$L = \frac{\mu_0}{2\pi} l\left[ \ln\left\{ \frac{2l}{d} + \sqrt{1 + \left(\frac{2l}{d}\right)^2} \right\} + \frac{d}{2l} - \sqrt{1+\left(\frac{d}{2l}\right)^2} + \frac{\mu_r}{4} \right]$

Finally we will use (in H with l in m):

$L = \frac{\mu_0}{2\pi} l\left[ \ln\left\{ \frac{2l}{d} + \sqrt{1 + \left(\frac{2l}{d}\right)^2} \right\} + \frac{d}{2l} - \sqrt{1+\left(\frac{d}{2l}\right)^2} + C \right]$

Parameters:

f	frequency
d	bond wire diameter
l	bond wire length (in meters)
rho	bond wire resistivity
mur	relative magnetic permeabillity

Definition at line 254 of file bondwire.cpp.

nr_double_t bondwire::Lmirror ( void ) const [private]

Compute inductance modeling ground plane effect. According to [1] pp64 (2.32) inductance (in nH) is such as ( $l$ in micrometers):

$L = 2\times10^{-4} l \left[ \ln \frac{4h}{d} + \ln \frac{l+\sqrt{l^2+d^2/4}}{l+\sqrt{l^2+4h^2}} + \sqrt{1+\frac{4h^2}{l^2}} - \sqrt{1+\frac{d^2}{4l^2}} - 2 \frac{h}{l} + \frac{d}{2l} \right]$

Finally we will use (in H with l in m):

$L = \frac{\mu_0}{2\pi} l \left[ \ln \frac{4h}{d} + \ln \frac{l+\sqrt{l^2+d^2/4}}{l+\sqrt{l^2+4h^2}} + \sqrt{1+\frac{4h^2}{l^2}} - \sqrt{1+\frac{d^2}{4l^2}} - 2 \frac{h}{l} + \frac{d}{2l} \right]$

Note:: Mirror is a strange model that is frequency independent. Whereas computations are valid, hypothesis are arguable. Indeed, they did the assumption that the ground plane is perfect that is really a zero order model in the high frequency domain.

Definition at line 297 of file bondwire.cpp.

nr_double_t bondwire::resistance ( const nr_double_t f ) const [private]

Compute resitance of the wire. Resitance of the wire is computed using classical tube model enhanced for case where tube is greater than conductor (i.e. low frequency case).

Todo:: Offer other resistance model for instance exponential decay and bessel function exact computation. But I do not know it is worth the effort.