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

The example CauerLowPassSC is a low-pass-filter of the fifth order. It is realized using an switched-capacitor 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.

This model is identical to the CauerLowPassOPV example. But the resistors are realized by switched capacitors (see SwitchedCapacitor). There are two different types of instances, one with a value of R=1 and one with a value of R=-1.

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

Due to the recharging of the capacitances after switching the performance of simulation is not as good as in the CauerLowPassOPV example.

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