In the figure we have 3 oscillators with logic gates that can be triggered by external logic signals. The circuits were found in the Radio Electronics magazine of April 1987.
This circuit for receiving or transmitting low power was found in old American documentation. It is...
This circuit takes advantage of the hysteresis of a relay to provide a latching effect. The...
This high gain circuit is from 1969 General Electric documentation. The transistors are of the...