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 was found in an Analog Devices manual and can supply a 3 mA current or drain a 10 mA...
This 1967 Raytheon circuit uses an optical coupler of the era and has a range of 800 to 200 Hz....
The integrated circuit used in this project is not common today. It was found in a 2000...