Abstract: An amplifier circuit having a controllable output power level comprises an attenuator configurable for receiving an input signal and operative to control an attenuation thereof, and an amplifier coupled to the attenuator, the amplifier receiving the attenuated input signal and generating an amplified output signal. The amplifier circuit further includes at least one power detector configurable to independently detect at least a portion of an incidental wave and a reflected wave corresponding to the amplified output signal and to generate first and second signals representative of the detected incidental and reflected waves, respectively. A controller is coupled between the power detector and the attenuator in a feedback configuration, the controller controlling the attenuation of the input signal and/or an amplification of the input signal as a function of the first and second signals from the power detector.

Abstract: An amplifier circuit having a controllable output power level comprises an attenuator configurable for receiving an input signal and operative to control an attenuation thereof, and an amplifier coupled to the attenuator, the amplifier receiving the attenuated input signal and generating an amplified output signal. The amplifier circuit further includes at least one power detector configurable to independently detect at least a portion of an incidental wave and a reflected wave corresponding to the amplified output signal and to generate first and second signals representative of the detected incidental and reflected waves, respectively. A controller is coupled between the power detector and the attenuator in a feedback configuration, the controller controlling the attenuation of the input signal and/or an amplification of the input signal as a function of the first and second signals from the power detector.