Introduction - If you have any usage issues, please Google them yourself
This report consists of describing the design and assembly of a filter circuit
active low pass of 4th order Butterworth. The circuit is designed for
cut-off frequency of 1 kHz and gain in average frequencies of 10 dB.
From the analysis of the measured values, the circuit presented a gain of 9.8 dB
in the passband and cut-off frequency of 1.1 KHz.