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.
CMOS inverters can be used as amplifiers, obtaining a flat response up to approximately 20 kHz....
The maximum time interval of this circuit depends on C1. Larger values can be used to get closer to...
This sonic relay or vox was found in a Popular Electronics from the 90's. The power MOSFET can be of...