Modelica.Electrical.Analog.Examples.Utilities

Information

This package contains some utility components used by package examples. These components are auxiliary components that should not be used like true MLS components since they are designed the purpose of the examples only, not for common use.

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
Nand	CMOS NAND Gate (see Tietze/Schenk, page 157)
NonlinearResistor	Chua's resistor
RealSwitch	Ideal switch with resistance
Transistor	Transistor with resistance an capacitance

Modelica.Electrical.Analog.Examples.Utilities.Nand

Information

The nand gate is a basic CMOS building block. It consists of four CMOS transistors.

Reference:

Tietze, U.; Schenk, Ch.: Halbleiter-Schaltungstechnik. Springer-Verlag Berlin Heidelberg NewYork 1980, p. 157

Connectors

Type	Name	Description
Pin	x1
Pin	x2
Pin	Vdd
Pin	y

Modelica definition

model Nand "CMOS NAND Gate (see Tietze/Schenk, page 157)"

  Semiconductors.PMOS TP1(
    W=6.5e-6,
    L=3.1e-6,
    Beta=1.05e-5,
    Vt=-1,
    K2=0.41,
    K5=0.8385,
    dW=-2.5e-6,
    dL=-2.1e-6);
  Semiconductors.PMOS TP2(
    W=6.5e-6,
    L=3.1e-6,
    Beta=1.05e-5,
    Vt=-1,
    K2=0.41,
    K5=0.8385,
    dW=-2.5e-6,
    dL=-2.1e-6);
  Semiconductors.NMOS TN1(
    W=6.5e-6,
    L=3.1e-6,
    Beta=4.1e-5,
    Vt=0.8,
    K2=1.144,
    K5=0.7311,
    dW=-2.5e-6,
    dL=-1.5e-6);
  Semiconductors.NMOS TN2(
    W=6.5e-6,
    L=3.1e-6,
    Beta=4.1e-5,
    Vt=0.8,
    K2=1.144,
    K5=0.7311,
    dW=-2.5e-6,
    dL=-1.5e-6);
  Basic.Capacitor C4(C=0.4e-13);
  Basic.Capacitor C7(C=0.4e-13);
  Basic.Ground Gnd;
  Basic.Ground Gnd2;
  Basic.Ground Gnd3;
  Basic.Ground Gnd6;
  Basic.Ground Gnd7;
  Basic.Ground Gnd8;
  Interfaces.Pin x1;
  Interfaces.Pin x2;
  Interfaces.Pin Vdd;
  Interfaces.Pin y;
equation 
  connect(TN1.S, TN2.D);
  connect(TN2.B, Gnd.p);
  connect(TN2.D, C7.p);
  connect(TN2.S, Gnd.p);
  connect(TP1.S, TN1.D);
  connect(TP1.G, TN1.G);
  connect(C4.n, Gnd2.p);
  connect(C7.n, Gnd3.p);
  connect(TP2.B, Gnd6.p);
  connect(TN1.B, Gnd7.p);
  connect(TP1.B, Gnd8.p);
  connect(TP2.G, x1);
  connect(TP2.G, TN2.G);
  connect(TN1.G, x2);
  connect(TP2.S, TN1.D);
  connect(TN1.D, C4.p);
  connect(Vdd, TP1.D);
  connect(TP2.D, Vdd);
  connect(C4.p, y);
end Nand;

Modelica.Electrical.Analog.Examples.Utilities.NonlinearResistor

Information

This is the only nonlinear component for Chua';s circuit. It is a piecewise linear resistor with both an inner and an outer range, which includes the inner one. The slopes of both ranges are given by parameters. The resistance caracteristic is continuous. For Chua';s circuit both slopes have to be chosen to be negative.

Extends from Interfaces.OnePort (Component with two electrical pins p and n and current i from p to n).

Parameters

Type	Name	Default	Description
Conductance	Ga		Conductance in inner voltage range [S]
Conductance	Gb		Conductance in outer voltage range [S]
Voltage	Ve		Inner voltage range limit [V]

Connectors

Type	Name	Description
PositivePin	p	Positive pin (potential p.v > n.v for positive voltage drop v)
NegativePin	n	Negative pin

Modelica definition

model NonlinearResistor "Chua's resistor"
  extends Interfaces.OnePort;

  parameter SI.Conductance Ga "Conductance in inner voltage range";
  parameter SI.Conductance Gb "Conductance in outer voltage range";
  parameter SI.Voltage Ve "Inner voltage range limit";
equation 
  i = if (v < -Ve) then Gb*(v + Ve) - Ga*Ve else if (v > Ve) then Gb*(v - Ve)
     + Ga*Ve else Ga*v;
end NonlinearResistor;

Modelica.Electrical.Analog.Examples.Utilities.RealSwitch

Information

This component is a special kind of a commuting switch which possesses an additional constant resistance. This resistance was necessary in an example. It is not designed for common use.

Connectors

Type	Name	Description
Pin	p
Pin	n1
Pin	n2
Pin	control

Modelica definition

model RealSwitch "Ideal switch with resistance"

  Ideal.ControlledIdealCommutingSwitch S(level=2.5);
  Basic.Resistor R(R=0.01);
  Interfaces.Pin p;
  Interfaces.Pin n1;
  Interfaces.Pin n2;
  Interfaces.Pin control;
equation 
  connect(p, R.p);
  connect(R.n, S.p);
  connect(n1, S.n1);
  connect(n2, S.n2);
  connect(control, S.control);
end RealSwitch;

Modelica.Electrical.Analog.Examples.Utilities.Transistor

Information

Since the simple bipolar transistor model does not have base or collector resistances both are added in this component. Additionally, a capacity is added to the base pin. See the schematic for more detailes. In such a way the transistor model can be enhanced to become more common.

Connectors

Type	Name	Description
Pin	c
Pin	b
Pin	e

Modelica definition

model Transistor "Transistor with resistance an capacitance"

  Basic.Resistor rtb(R=0.05);
  Basic.Resistor rtc(R=0.1);
  Basic.Capacitor ct(C=1e-10);
  Semiconductors.NPN Tr(
    Bf=50,
    Br=0.1,
    Is=1e-16,
    Vak=0.02,
    Tauf=0.12e-9,
    Taur=5e-9,
    Ccs=1e-12,
    Cje=0.4e-12,
    Cjc=0.5e-12,
    Phie=0.8,
    Me=0.4,
    Phic=0.8,
    Mc=0.333,
    Gbc=1e-15,
    Gbe=1e-15,
    Vt=0.02585);
  Basic.Ground Ground1;
  Interfaces.Pin c;
  Interfaces.Pin b;
  Interfaces.Pin e;
equation 
  connect(rtb.n, Tr.B);
  connect(rtb.n, ct.p);
  connect(ct.n, Ground1.p);
  connect(Tr.C, rtc.p);
  connect(rtc.n, c);
  connect(b, rtb.p);
  connect(Tr.E, e);
end Transistor;