| 摘要 |
The invention concerns a phase and frequency comparator for feedback control of the frequency and the phase (Fvco) of a frequency-controlled oscillator output signal, on the basis of the frequency (Fref) and of the phase of a reference signal (Sref), comprising means (11, 12, 21, 22) for detecting in each of the reference signals (Sref) and coming from the oscillator of events representing the frequency and the phase of the signal, means (S1+, S1-, 16, 17) for generating a first or second signal, when an event is detected, means (S2+, S2-, 24 to 27) for generating a third or fourth signal, when an event is detected, if respectively the first or the second signal is generated, means for applying all the generated signals (Io; Vo) to the oscillator, means (13, 23) for stopping generation of the first and second signals or of all the signals when respectively the first and second signals or the third and fourth signals are simultaneously generated.
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