modelNMOS

Simple NMOS transistor with heating port

Extends from Modelica.Electrical.Analog.Interfaces.ConditionalHeatPort (Partial model to include a conditional HeatPort in order to describe the power loss via a thermal network).

Information

The NMOS model is a simple model of a n-channel metal-oxide semiconductor FET. It differs slightly from the device used in the SPICE simulator. For more details please care for [Spiro1990].
A heating port is added for thermal electric simulation. The heating port is defined in the Modelica.Thermal library.
The model does not consider capacitances. A high drain-source resistance RDS is included to avoid numerical difficulties.

W       L      Beta         Vt      K2     K5       dW       dL
m       m      A/V^2        V       -      -        m        m
12.e-6  4.e-6  0.062e-3    -4.5     0.24   0.61    -1.2e-6  -0.9e-6      depletion
60.e-6  3.e-6  0.048e-3     0.1     0.08   0.68    -1.2e-6  -0.9e-6      enhancement
12.e-6  4.e-6  0.0625e-3   -0.8     0.21   0.78    -1.2e-6  -0.9e-6      zero
50.e-6  8.e-6  0.0299e-3    0.24    1.144  0.7311  -5.4e-6  -4.e-6
20.e-6  6.e-6  0.041e-3     0.8     1.144  0.7311  -2.5e-6  -1.5e-6
30.e-6  9.e-6  0.025e-3    -4.0     0.861  0.878   -3.4e-6  -1.74e-6
30.e-6  5.e-6  0.031e-3     0.6     1.5    0.72     0       -3.9e-6
50.e-6  6.e-6  0.0414e-3   -3.8     0.34   0.8     -1.6e-6  -2.e-6       depletion
50.e-6  5.e-6  0.03e-3      0.37    0.23   0.86    -1.6e-6  -2.e-6       enhancement
50.e-6  6.e-6  0.038e-3    -0.9     0.23   0.707   -1.6e-6  -2.e-6       zero
20.e-6  4.e-6  0.06776e-3   0.5409  0.065  0.71    -0.8e-6  -0.2e-6
20.e-6  4.e-6  0.06505e-3   0.6209  0.065  0.71    -0.8e-6  -0.2e-6
20.e-6  4.e-6  0.05365e-3   0.6909  0.03   0.8     -0.3e-6  -0.2e-6
20.e-6  4.e-6  0.05365e-3   0.4909  0.03   0.8     -0.3e-6  -0.2e-6
12.e-6  4.e-6  0.023e-3    -4.5     0.29   0.6      0        0           depletion
60.e-6  3.e-6  0.022e-3     0.1     0.11   0.65     0        0           enhancement
12.e-6  4.e-6  0.038e-3    -0.8     0.33   0.6      0        0           zero
20.e-6  6.e-6  0.022e-3     0.8     1      0.66     0        0

References: [Spiro1990]

Parameters

Type	Name	Default	Description
SI.Length	W	20.e-6	Width
SI.Length	L	6.e-6	Length
SI.Transconductance	Beta	0.041e-3	Transconductance parameter
SI.Voltage	Vt	0.8	Zero bias threshold voltage
Real	K2	1.144	Bulk threshold parameter
Real	K5	0.7311	Reduction of pinch-off region
SI.Length	dW	-2.5e-6	Narrowing of channel
SI.Length	dL	-1.5e-6	Shortening of channel
SI.Resistance	RDS	1e7	Drain-Source-Resistance
Boolean	useTemperatureDependency	false	= true, if parameters Beta, K2 and Vt depend on temperature
SI.Temperature	Tnom	300.15	Parameter measurement temperature
Real	kvt	-6.96e-3	Fitting parameter for Vt
Real	kk2	6e-4	Fitting parameter for K2
Boolean	useHeatPort (from ConditionalHeatPort)	false	= true, if heatPort is enabled
SI.Temperature	T (from ConditionalHeatPort)	293.15	Fixed device temperature if useHeatPort = false

Connectors

Type	Name	Description
Modelica.Electrical.Analog.Interfaces.Pin	D	Drain
Modelica.Electrical.Analog.Interfaces.Pin	G	Gate
Modelica.Electrical.Analog.Interfaces.Pin	S	Source
Modelica.Electrical.Analog.Interfaces.Pin	B	Bulk
Modelica.Thermal.HeatTransfer.Interfaces.HeatPort_a	heatPort (from ConditionalHeatPort)	Conditional heat port

Components

Type	Name	Default	Description
SI.Power	LossPower (from ConditionalHeatPort)		Loss power leaving component via heatPort
SI.Temperature	T_heatPort (from ConditionalHeatPort)		Temperature of heatPort

Revisions

March 11, 2009 by Christoph Clauss
conditional heat port added
December 7, 2005 by Christoph Clauss
error in RDS calculation deleted
March 31, 2004 by Christoph Clauss
implemented