This circuit detects when a signal reaches its peak value. The source must be symmetrical and equivalent operational amplifiers can be used. This circuit was found in an old European publication.
This circuit was found in a 1970s documentation. The components are from that time, and...
This circuit uses a Darlington transistor and was found in a 1986 documentation. The circuit...
This circuit is from an American 1967 documentation and can be implemented with modern equivalent...