This shield was found on an old EDN. The MOSFET can be of any type according to the controlled load. The power can be between 5 and 15 V typically and can be different for the MOSFET.
This high Q “rejector” or notch filter rejects signals whose frequencies are in the range...
This circuit was found in documentation from the 90's, having an LC compensation network. The...
This two-transistor circuit was found in the January 1994 issue of Electronics Now magazine....