H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
H03J7/02—Automatic frequency control
H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
H03J7/042—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant with reactance tube
Landscapes
Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers
(AREA)
Circuit de réglage du rapport cyclique d'un signal périodique impulsionnel et dispositif multiplicateur de fréquence par 2n, incluant ce circuit de réglage
Procede de detection de faux accrochages du signal de reference sur le signal a demoduler en demodulation numerique coherente et dispositif mettant en oeuvre un tel procede