This circuit was found in Maxim's documentation from the 90's. The configuration uses components from the time but can be adapted to use modern equivalents.
This passive circuit was found in a 1993 Electronics Hobbyst Handbook. The circuit has the...
This circuit is tuned to reject stations of different wave bands that may be interfering with the...
We found this circuit in an English documentation from 1979. It shows how you use a 100 uA...