This circuit is tuned to reject stations of different wave bands that may be interfering with the reception of short waves.
This circuit is from the LM101 manual. However, the configuration is valid for other operationals. The...
Other operational amplifiers from the same family such as MC34002, MC35001, MC34004 and MC35004 can...
This circuit is from an old 1974 documentation. The circuit can be used to obtain longer...