In the figure we have two circuits of limiters that provide the cut of the negative peaks of a signal. The circuit is from an 80's telecom documentation being adaptable on common receivers.
This circuit is from an old American documentation. In it we have a simple way to fire an SCR from...
We found this circuit in an American publication from the 1990s. Any FET can be used. The circuit...
It can be obtained from Mouser Electronics, sensors (receivers) transmitters and benders for...