Design process for a phase-locked loop, of the type comprising: - a controlled-frequency oscillator (VCO, DCO); - a phase comparator, configured to determine a phase difference between an output signal of said controlled-frequency oscillator and a reference signal; - a corrector (F 1), termed the first corrector, configured to receive as input a signal representative of said phase difference and to generate at its output a signal termed the first correction signal; - at least one other corrector (F 2), termed the second corrector, configured to receive as input a signal representative of or affected by a phase noise of said reference signal or of said output signal of said controlled-frequency oscillator and to generate at its output a signal termed the second correction signal; and - a means for generating a slaving signal (u) for said controlled-frequency oscillator on the basis of said first and second correction signals; said process comprising a step of determining transfer functions of said correctors and being characterized in that said first and second correctors exhibit non-constant transfer functions, chosen so as to allow the rejection, in one and the same frequency band, of the phase noise of said reference signal and of the phase noise of said output signal of said controlled-frequency oscillator and in that said step is implemented, by means of a computer, by applying the H ∞ method utilizing: - at input, a weighting function (W b) for a phase noise of said controlled-frequency oscillator, termed the first weighting function, and a weighting function (W bref) for a phase noise of a reference signal, termed the second weighting function, and which are determined on the basis of nominal power spectral densities of said noise; and - at output, at least one weighting function (W φ, W ε) for a phase noise of an output signal of the phase-lock loop or of an error in tracking said reference signal, termed the third weighting function, determined on the basis of a phase noise power spectral density template of said output signal having to be complied with. - a controlled-frequency oscillator (VCO, DCO); - a phase comparator, configured to determine a phase difference between an output signal of said controlled-frequency oscillator and a reference signal; - a corrector (F 1), termed the first corrector, configured to receive as input a signal representative of said phase difference and to generate at its output a signal termed the first correction signal; - at least one other corrector (F 2), termed the second corrector, configured to receive as input a signal representative of or affected by a phase noise of said reference signal or of said output signal of said controlled-frequency oscillator and to generate at its output a signal termed the second correction signal; and - a means for generating a slaving signal (u) for said controlled-frequency oscillator on the basis of said first and second correction signals; - at input, a weighting function (W b) for a phase noise of said controlled-frequency oscillator, termed the first weighting function, and a weighting function (W bref) for a phase noise of a reference signal, termed the second weighting function, and which are determined on the basis of nominal power spectral densities of said noise; and - at output, at least one weighting function (W φ, W ε) for a phase noise of an output signal of the phase-lock loop or of an error in tracking said reference signal, termed the third weighting function, determined on the basis of a phase noise power spectral density template of said output signal having to be complied with.