WOLFRAM SYSTEMMODELER

CauerLowPassOPV

Cauer low pass filter with operational amplifiers

Diagram

Wolfram Language

In[1]:=
SystemModel["Modelica.Electrical.Analog.Examples.CauerLowPassOPV"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

The example Cauer Filter is a low-pass-filter of the fifth order. It is realized using an analog network with operational amplifiers. The voltage source V is the input voltage (step), and the OP5.out.v is the filter output voltage. The pulse response is calculated.

This model is identical to the CauerLowPassAnalog example, but inverting. To get the same response as that of the CauerLowPassAnalog example, a negative voltage step is used as input.

The simulation end time should be 60. Please plot both V.v (which is the inverted input voltage) and OP5.p.v (output voltage). Compare this result with the CauerLowPassAnalog result.

During translation some warnings are issued concerning resistor values (Value=-1 not in range [0,1e100]). Do not worry about it. The negative values are o.k.

Parameters (7)

l1

Value: 1.304

Type: Capacitance (F)

Description: filter coefficient i1

l2

Value: 0.8586

Type: Capacitance (F)

Description: filter coefficient i2

c1

Value: 1.072

Type: Capacitance (F)

Description: filter coefficient c1

c2

Value: 1 / (1.704992 ^ 2 * l1)

Type: Capacitance (F)

Description: filter coefficient c2

c3

Value: 1.682

Type: Capacitance (F)

Description: filter coefficient c3

c4

Value: 1 / (1.179945 ^ 2 * l2)

Type: Capacitance (F)

Description: filter coefficient c4

c5

Value: 0.7262

Type: Capacitance (F)

Description: filter coefficient c5

Components (32)

C1

Type: Capacitor

C2

Type: Capacitor

C3

Type: Capacitor

C4

Type: Capacitor

C5

Type: Capacitor

R1

Type: Resistor

R2

Type: Resistor

R3

Type: Resistor

Op1

Type: IdealOpAmp3Pin

G

Type: Ground

R4

Type: Resistor

R5

Type: Resistor

Op2

Type: IdealOpAmp3Pin

Op3

Type: IdealOpAmp3Pin

G1

Type: Ground

R6

Type: Resistor

R7

Type: Resistor

C6

Type: Capacitor

R8

Type: Resistor

R9

Type: Resistor

R10

Type: Resistor

Op4

Type: IdealOpAmp3Pin

Op5

Type: IdealOpAmp3Pin

C7

Type: Capacitor

C8

Type: Capacitor

C9

Type: Capacitor

R11

Type: Resistor

G2

Type: Ground

G3

Type: Ground

G4

Type: Ground

V

Type: StepVoltage

Ground1

Type: Ground