Patent ID: 6407643
Filing Date: 2002-06-18
Classification: H03L

Abstract:
A phase-locked loop, comprising:an oscillator intended to produce an output signal having an oscillation frequency whose value depends on that of a tuning signal, a frequency divider intended to receive the output signal from the oscillator and to supply an output signal having a frequency which is R times lower than the oscillation frequency, and a phase/frequency detector intended to compare the frequency of the output signal of the divider with a so-called comparison frequency of a comparison signal, and to supply the tuning signal, whose value is representative of the result of the comparison, to the oscillator, which phase-locked loop is characterized in that it is provided with correction means intended to detect a parasitic phase modulation applied to the output signal of the oscillator, and to apply a phase modulation, which is similar to said parasitic phase modulation, to the comparison signal.