A method of calibrating a delay generation circuit, the circuit comprising: - a capacitive element (Cc) of integration of a first current supplied by a first current source, wherein the first current source comprises a first digital-to-analog converter controlled by a first digital control code; - a circuit of initialization of the capacitive element on order of an initialization signal (RESET); - a comparator of a first charge voltage of said capacitive element (Cc) with respect to a second voltage, said second voltage being generated from a second digital-to-analog converter controlled by a second digital control code, the comparator having a comparison output delivering an output signal having a desired delay with respect to the initialization signal; and wherein, during a phase of use of the delay generation circuit, only one code, called selection code, among the first and second digital control codes (A; B) is used to select the desired delay, the other control code, called adjustment code, remaining at a predefined value; and wherein, during a phase of calibration of the delay generation circuit, the first and second digital control codes (A; B) are used to defined said predefined value and the comparison output is coupled to an input of a phase comparator; and wherein the calibration method comprises the steps of: in a first test phase: a1) applying a first set of first and second digital control codes and applying an initialization signal; b1) delivering, on another input of the phase comparator, a calibration signal having a first reference delay (Ts) with respect to the initialization signal; c1) analyzing the output signal of the phase comparator; and in a second test phase: a2) applying a second set of first and second digital control codes and applying an initialization signal; b2) delivering, on said other input of the comparator, a calibration signal having a delay equal to the sum of the first reference delay (Ts) and of a second reference delay (Tref); c2) analyzing the output signal of the phase comparator. - a capacitive element (Cc) of integration of a first current supplied by a first current source, wherein the first current source comprises a first digital-to-analog converter controlled by a first digital control code; - a circuit of initialization of the capacitive element on order of an initialization signal (RESET); - a comparator of a first charge voltage of said capacitive element (Cc) with respect to a second voltage, said second voltage being generated from a second digital-to-analog converter controlled by a second digital control code, the comparator having a comparison output delivering an output signal having a desired delay with respect to the initialization signal; and in a first test phase: a1) applying a first set of first and second digital control codes and applying an initialization signal; b1) delivering, on another input of the phase comparator, a calibration signal having a first reference delay (Ts) with respect to the initialization signal; c1) analyzing the output signal of the phase comparator; and a1) applying a first set of first and second digital control codes and applying an initialization signal; b1) delivering, on another input of the phase comparator, a calibration signal having a first reference delay (Ts) with respect to the initialization signal; c1) analyzing the output signal of the phase comparator; and in a second test phase: a2) applying a second set of first and second digital control codes and applying an initialization signal; b2) delivering, on said other input of the comparator, a calibration signal having a delay equal to the sum of the first reference delay (Ts) and of a second reference delay (Tref); c2) analyzing the output signal of the phase comparator. a2) applying a second set of first and second digital control codes and applying an initialization signal; b2) delivering, on said other input of the comparator, a calibration signal having a delay equal to the sum of the first reference delay (Ts) and of a second reference delay (Tref); c2) analyzing the output signal of the phase comparator.