Oscillator (100) locked by injection comprising: - a control input receiving a control signal, the value of the natural frequency of the oscillator being a function of the amplitude of the control signal; - a synchronization input receiving a signal periodic synchronization, the oscillator delivering an output signal of frequency equal to that of the synchronization signal and such that a phase shift between the output signal and the synchronization signal is a function of a difference between the natural frequency of the oscillator and the frequency of the synchronization signal; - a first load impedance (108) to which a load signal is applied; - a second load impedance (114); - a first coupling component (116) coupling periodically, to the synchronization frequency the second load impedance to the first load impedance. Figure for the abstract: Figure 4.
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