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.

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