WOLFRAM SYSTEMMODELER

CauerLowPassOPV

Cauer low pass filter with operational amplifiers

Diagram

Wolfram Language

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SystemModel["Modelica.Electrical.Analog.Examples.CauerLowPassOPV"]
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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[0,1.e+100]). 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

Description:

C2

Type: Capacitor

Description:

C3

Type: Capacitor

Description:

C4

Type: Capacitor

Description:

C5

Type: Capacitor

Description:

R1

Type: Resistor

Description:

R2

Type: Resistor

Description:

R3

Type: Resistor

Description:

Op1

Type: IdealOpAmp3Pin

Description:

G

Type: Ground

Description:

R4

Type: Resistor

Description:

R5

Type: Resistor

Description:

Op2

Type: IdealOpAmp3Pin

Description:

Op3

Type: IdealOpAmp3Pin

Description:

G1

Type: Ground

Description:

R6

Type: Resistor

Description:

R7

Type: Resistor

Description:

C6

Type: Capacitor

Description:

R8

Type: Resistor

Description:

R9

Type: Resistor

Description:

R10

Type: Resistor

Description:

Op4

Type: IdealOpAmp3Pin

Description:

Op5

Type: IdealOpAmp3Pin

Description:

C7

Type: Capacitor

Description:

C8

Type: Capacitor

Description:

C9

Type: Capacitor

Description:

R11

Type: Resistor

Description:

G2

Type: Ground

Description:

G3

Type: Ground

Description:

G4

Type: Ground

Description:

V

Type: StepVoltage

Description:

Ground1

Type: Ground

Description: