Patent ID: 7872546

Claim:
A multi mode modulator for controlling a power output stage having at least one controlled transistor, the multi mode modulator comprises: a) a pulse width modulation (PWM) modulator operating under a PWM-frequency for controlling the power output stage under a PWM mode; b) at least one non-pulse width modulation (NPWM) modulators for controlling the power output stage under a mode other than the PWM mode; and c) a mode selector coupled to the PWM modulator and the at least one NPWM modulators for, c1) when it is desirable to operate under the PWM mode, powering the PWM modulator while leaving the at least one NPWM modulators in a power off state; and c2) when it is desirable to operate under the NPWM mode, powering the at least one NPWM modulators while leaving the PWM modulator in a power off state, where the mode selector further comprises a dynamic frequency booster for boosting up the PWM-frequency from its normal operating frequency during a NPWM-to-PWM mode transition period thereby shortening said mode transition period till normal PWM operation.