Automatic electronic tuning system, characterized in that the integrating capacity of the resonant circuit in derivation and that also involves a tuning inductance is constituted based on the capacity, of variable magnitude, which has a semiconductor diode of capacity type function of the value of that applied to its terminals, which are connected, in turn, to a generator circuit that produces a tension in the form of a sawtooth, which, applied to the diode, determines the regulation of the capacity associated with it and, in consequently, the possibility of resonance of the tuning oscillating circuit within a specific frequency rubber, the value of the chosen frequency being modified by external actuation of an operating device on one of the electrical elements of the generating circuit. (Machine-translation by Google Translate, not legally binding)
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