Thread: How would you implement a second filter system?

Originally Posted by Moana

This second order low pass filter circuit has two RC networks,

R1 – C1

and

R2 – C2

which give the filter its frequency response properties. The filter design is based around a non-inverting op-amp configuration so the filters gain,

A

will always be greater than 1. Also the op-amp has a high input impedance which means that it can be easily cascaded with other active filter circuits to give more complex filter designs.

Can you tell me how this RC network help to implement the second filter?