We found this circuit in a publication by General Electric in the 1980s. The transistors and the PUT are from that time. The control is done by a tachometer based on an optical coupler.
This circuit provides a signal that is twice the frequency of the input signal. The circuit was...
An interesting application of the 4093 integrated circuit is the one shown in the figure, in which...
This tunnel diode oscillator was found in July 1986, Radio Electronics magazine. Note the low...