A pseudo-sine signal generation device (D) comprises i) a differential tunable integration means (SI) arranged to generate differential triangular signals (TS) with a chosen constant output amplitude from input differential square signals (SS), and ii) a differential processing means (PM) arranged to apply a chosen transfer function to the differential triangular signals (TS) in order to reject at least a third harmonic thereof when the amplitude of the differential triangular signals (TS) is equal to the chosen constant amplitude and then to output pseudo-sine signals (OS) with a quasi-constant amplitude.