Patent ID: 8390381

Claim:
A Doherty power amplifier comprising: a first power amplifier adapted to receive an input signal and adapted to provide a first output signal which is phase shifted with respect to the input signal; a second power amplifier, adapted to receive a phase shifted input signal and adapted to provide a second output signal; characterized in that at least one of the first or the second power amplifiers comprises a first driver power amplifier comprising a first gate input and a first drain output; the first driver power amplifier being coupled to a first output power amplifier comprising a second gate input and a second drain output; the first gate input and the second gate input being adapted to receive a control signal, the control signal being obtained after an envelope detection provided by an envelope detector coupled to the input signal; and a control logic circuit configured and arranged to provide first and second limiter output signals in response to the envelope detection for controlling the first and second gate inputs, respectively, depending on respective amplitudes of the first and second limiter output signals.