Class DepletionWidth

java.lang.Object
  |
  +--DepletionWidth

class DepletionWidth

extends java.lang.Object

implements PhysicsConstants

Class to calculate depletion width, and display a diagram.

Field Summary

protected double	maxX The maximum depletion value that will be visible on this diagram
protected double	minV The minimum voltage for which this diagram may be displayed
protected double	minX The minimum depletion value that will be visible on this diagram
protected double	Na The acceptor density
protected double	Nd The donor density
protected double	nMultiplier The precalculated electron depletion multiplier
protected double	pMultiplier The precalculated hole depletion multiplier
protected double	v0 The value of v0
protected double	wMultiplier The precalculated total depletion multiplier

Fields inherited from interface PhysicsConstants

e, e_over_k, epsilon, epsilon0, h, h_bar, k, m, q, si_rel_perm

Constructor Summary

DepletionWidth(double Na, double Nd, double minV)
Creates a new DepletionWidth object.

Method Summary

double	getNa() Returns the acceptor density
double	getNd() Returns the donor density
double	getV0() Returns the value of v0
double	getW(double v) Returns W = xn + xn, the sum of the depletion widths.
double	getXn(double v) Returns xn, the electron depletion width
double	getXp(double v) Returns xp, the hole depletion width
void	paint(java.awt.Graphics g, double v, int w, int h) Draws a depletion diagram.
protected void	recalcMultipliers() All the constants are combined into a multiplier, for tidiness and efficiency.
void	setMinV(double minV) Used to indicate that the minimum voltage has changed.
void	setN(double Na, double Nd) Sets the acceptor and donor densities to the specified values.
void	setNa(double d) Sets the acceptor density
void	setNd(double d) Sets the donor density
void	setV0(double d) Sets the value of v0

Methods inherited from class java.lang.Object

, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait

Field Detail

Na

protected double Na

The acceptor density

Nd

protected double Nd

The donor density

nMultiplier

protected double nMultiplier

The precalculated electron depletion multiplier

pMultiplier

protected double pMultiplier

The precalculated hole depletion multiplier

wMultiplier

protected double wMultiplier

The precalculated total depletion multiplier

minX

protected double minX

The minimum depletion value that will be visible on this diagram

maxX

protected double maxX

The maximum depletion value that will be visible on this diagram

v0

protected double v0

The value of v₀

minV

protected double minV

The minimum voltage for which this diagram may be displayed

Constructor Detail

DepletionWidth

public DepletionWidth(double Na,
                      double Nd,
                      double minV)

Creates a new DepletionWidth object. The minimum voltage must be known in order for the possible range of the depletion width to be calculated.

Parameters:

Na - The acceptor density

Nd - The donor density

minV - The minimum voltage

Method Detail

getXn

public double getXn(double v)

Returns x_n, the electron depletion width

getXp

public double getXp(double v)

Returns x_p, the hole depletion width

getW

public double getW(double v)

Returns W = x_n + x_n, the sum of the depletion widths.

recalcMultipliers

protected void recalcMultipliers()

All the constants are combined into a multiplier, for tidiness and efficiency. This method will be automatically invoked when any of the constants involved changes, and will recalculate the multipliers.

getNa

public double getNa()

Returns the acceptor density

getNd

public double getNd()

Returns the donor density

setNa

public void setNa(double d)

Sets the acceptor density

setNd

public void setNd(double d)

Sets the donor density

setN

public void setN(double Na,
                 double Nd)

Sets the acceptor and donor densities to the specified values.

paint

public void paint(java.awt.Graphics g,
                  double v,
                  int w,
                  int h)

Draws a depletion diagram.

Parameters:

g - The Graphics surface on which to paint

v - The voltage for which the diagram should be drawn

w - The width (in pixels) availabe for the diagram

h - The height (in pixels) available for the diagram

setMinV

public void setMinV(double minV)

Used to indicate that the minimum voltage has changed.

getV0

public double getV0()

Returns the value of v₀

setV0

public void setV0(double d)

Sets the value of v₀