Patent ID: 7602878

Claim:
A method for dividing an input frequency of an input signal and supplying an output signal having a frequency lower than the input frequency, the method comprising: defining a division setpoint; defining a first threshold value and a second threshold value that vary according to the division setpoint; incrementing a counting value at a pace of the input signal; comparing the counting value with the first threshold value and with the second threshold value and producing, in synchronization with variation edges of a first type of the input signal, a first control signal and a second control signal; producing at least one third control signal shifted by a half-period of the input signal in relation to one of the first or second control signals; and generating the output signal using at least one of said control signals chosen according to a value of at least one least significant bit of the division setpoint, so as to adjust a period of the output signal or a duty cycle of the output signal with a precision at least equal to the half-period of the input signal.