This filter is from the Linear Applications Handbook of the National Semiconductor of 1994. However, it can be used with other operational and modified to operate with other frequencies.
We found this circuit in a 1998 documentation. The circuit can also be used as a minutery...
Found in a 1968 Electronics World, this circuit uses operational amplifiers from that time. |...
This circuit was found in a Radio Electronics issue from May 1989. Please note that it may not...