Electronic device for generating a fractional frequency

A radio transmitter comprising an electronic device, said electronic device comprising:

• a multi-phase controlled oscillator configured to generate, from a control signal, a plurality of signals phase-shifted each other;
• a difference phase detector configured to receive a selected signal from the plurality of phase-shifted signals, to receive a reference signal and to measure a difference between a phase of the selected signal and a phase of the reference signal;
• wherein the electronic device further comprises:
• an estimation and correction module configured to receive the measured phase difference and estimate a phase error affecting the generation of at least one of the plurality of phase-shifted signals, and configured to generate a corrected measure of the phase difference taking into account the estimated phase error;
• and
• a filter configured to receive the corrected measure of the phase difference and to generate therefrom the control signal to be provided to the multi-phase controlled oscillator.

A radio receiver comprising an electronic device, said electronic device comprising:

• a multi-phase controlled oscillator configured to generate, from a control signal, a plurality of signals phase-shifted each other;
• a difference phase detector configured to receive a selected signal from the plurality of phase-shifted signals, to receive a reference signal and to measure a difference between a phase of the selected signal and a phase of the reference signal;
• wherein the electronic device further comprises:
• an estimation and correction module configured to receive the measured phase difference and estimate a phase error affecting the generation of at least one of the plurality of phase-shifted signals, and configured to generate a corrected measure of the phase difference taking into account the estimated phase error;
• and
• a filter configured to receive the corrected measure of the phase difference and to generate therefrom the control signal to be provided to the multi-phase controlled oscillator.