This circuit is from 1964 documentation but can be easily implemented based on current components. Input waveforms and detection are shown next to the diagram.
May 2016 - It can be obtained from Mouser Electronics new display 1092 from VDC. The new LED...
This circuit generates circles on the screen of an oscilloscope. The circuit is from old...
This old configuration using a germanium transistor was designed to operate with variable...