This circuit provides a signal that is twice the frequency of the input signal. The circuit was found in the April 1990 issue of Radio Electronics magazine.
This receiver is from a 1967 Japanese publication. The transistors are germanium and the output...
This 80's circuit can be used in media recovery. The integrated circuit is of the time, but modern...
This circuit limits the intensity of the output signal to a level given by the zener diodes. The...