Variable-Frequency Audio Bp Filter Circuit


Posted on Feb 16, 2013

This variable-frequency, audio bandpass filter is built around two 741 op amps that are connected in cascade. Two 741 op amps are configured as identical RC active filters and are connected in cascade for better selectivity. The filter`s tuning range is from 500~Hz to 1500 Hz. The overall voltage gain is slightly greater than 1 and the filter`s is about 5, The circuit can handle input signals of 4 V peak-to-peak without being overdriven. The circuit`s input impedance is over 200 kohm.


Variable-Frequency Audio Bp Filter Circuit
Click here to download the full size of the above Circuit.

and its output impedance is less than 1 kohm.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

5 Zone Alarm System
PIC Programmer II
Astable multivibrator circuits
Precise Low-Current Source
Digital Temperature monitor with LM5 and AT89C51
9700s Analog Synth Modules



Top