net.sf.jaer.biasgen
Class Masterbias

java.lang.Object
  java.util.Observable
      net.sf.jaer.biasgen.Masterbias

All Implemented Interfaces:

BiasgenPreferences

public class Masterbias
extends java.util.Observable
implements BiasgenPreferences

Describes the master bias circuit and its configuration, and supplies methods for estimating parameters.

The schematic of a masterbias looks like this:

The master current is estimated in strong inversion as indicated in http://www.ini.unizh.ch/~tobi/biasgen/> as follows

See http://www.ini.unizh.ch/~tobi/biasgen

Author:

tobi

Field Summary

boolean	internalResistorUsed boolean that is true if we are using the internal resistor in series with an off-chip external resistor
boolean	powerDownEnabled true to power down masterbias, via powerDown input
float	rExternal external resistor used.
float	rInternal internal (on-chip) resistor value.
float	temperatureCelsius temperature in degrees celsius

Constructor Summary

Masterbias(Biasgen biasgen)
Creates a new instance of Masterbias.

Method Summary

void	exportPreferences(java.io.OutputStream os) export the prefered values to an OutputStream
float	getCurrent() the sum of weak and strong inversion master current estimates
float	getCurrentStrongInversion() estimated current if master running in strong inversion, computed from formula in http://www.ini.unizh.ch/~tobi/biasgen/> paper.
float	getCurrentWeakInversion() estimated current if operating in weak inversion: log(M) UT/R
float	getKPrimeNFet()
float	getMultiplier()
float	getRExternal()
float	getRInternal()
float	getTemperatureCelsius()
float	getTotalResistance()
float	getWOverL()
void	importPreferences(java.io.InputStream is) import prefs from an InputStream
boolean	isInternalResistorUsed()
boolean	isPowerDownEnabled()
void	loadPreferences() load the stored preferred values -- e.g.
void	setInternalResistorUsed(boolean internalResistorUsed)
void	setKPrimeNFet(float kPrimeNFet)
void	setMultiplier(float multiplier)
void	setPowerDownEnabled(boolean powerDownEnabled)
void	setRExternal(float rx)
void	setRInternal(float rint)
void	setTemperatureCelsius(float temperatureCelsius)
void	setWOverL(float WOverL)
void	storePreferences() store the present values as the preferred values
java.lang.String	toString()

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Field Detail

powerDownEnabled

public boolean powerDownEnabled

true to power down masterbias, via powerDown input

internalResistorUsed

public boolean internalResistorUsed

boolean that is true if we are using the internal resistor in series with an off-chip external resistor

rInternal

public float rInternal

internal (on-chip) resistor value. This is what you get when you tie pin rInternal to ground.

rExternal

public float rExternal

external resistor used. This can be the only capacitance if you tie it in line with rExternal, "rx". If you tie it to rInternal, you get the sum.

temperatureCelsius

public float temperatureCelsius

temperature in degrees celsius

Constructor Detail

Masterbias

public Masterbias(Biasgen biasgen)

Creates a new instance of Masterbias.

Method Detail

getTotalResistance

public float getTotalResistance()

getCurrentWeakInversion

public float getCurrentWeakInversion()

estimated current if operating in weak inversion: log(M) UT/R

getCurrentStrongInversion

public float getCurrentStrongInversion()

estimated current if master running in strong inversion, computed from formula in http://www.ini.unizh.ch/~tobi/biasgen/> paper.

getCurrent

public float getCurrent()

the sum of weak and strong inversion master current estimates

getRInternal

public float getRInternal()

setRInternal

public void setRInternal(float rint)

getRExternal

public float getRExternal()

setRExternal

public void setRExternal(float rx)

exportPreferences

public void exportPreferences(java.io.OutputStream os)

Description copied from interface: BiasgenPreferences

export the prefered values to an OutputStream

Specified by:

exportPreferences in interface BiasgenPreferences

importPreferences

public void importPreferences(java.io.InputStream is)

Description copied from interface: BiasgenPreferences

import prefs from an InputStream

Specified by:

importPreferences in interface BiasgenPreferences

loadPreferences

public void loadPreferences()

Description copied from interface: BiasgenPreferences

load the stored preferred values -- e.g. revert to the last stored values

Specified by:

loadPreferences in interface BiasgenPreferences

storePreferences

public void storePreferences()

Description copied from interface: BiasgenPreferences

store the present values as the preferred values

Specified by:

storePreferences in interface BiasgenPreferences

isPowerDownEnabled

public boolean isPowerDownEnabled()

setPowerDownEnabled

public void setPowerDownEnabled(boolean powerDownEnabled)

isInternalResistorUsed

public boolean isInternalResistorUsed()

setInternalResistorUsed

public void setInternalResistorUsed(boolean internalResistorUsed)

getTemperatureCelsius

public float getTemperatureCelsius()

setTemperatureCelsius

public void setTemperatureCelsius(float temperatureCelsius)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getMultiplier

public float getMultiplier()

setMultiplier

public void setMultiplier(float multiplier)

getWOverL

public float getWOverL()

setWOverL

public void setWOverL(float WOverL)

getKPrimeNFet

public float getKPrimeNFet()

setKPrimeNFet

public void setKPrimeNFet(float kPrimeNFet)