A system comprising: an amplifier having an input coupled to a radio frequency signal through a digital-to-analog circuit; an adaptive power supply having an output coupled to a bias voltage of the amplifier, wherein the output of the adaptive power supply is configured to have a shape similar to an envelope of the radio frequency signal; and a feedback circuit comprising a sensing circuit and a mapping circuit, wherein the sensing circuit is configured to: sense a current flowing from the adaptive power supply to the amplifier; and sense the bias voltage of the amplifier, and wherein the mapping circuit is configured to generate a control signal for dynamically adjusting parameters of a low pass filter so as to stabilize the adaptive power supply, wherein the adaptive power supply comprises the low pass filter, a pulse width modulation generator, a switching network and an output filter, characterized in that the low pass filter comprises: a first adjustable operation amplifier configured to provide a first adjustable zero for a control loop of the adaptive power supply; a second adjustable operation amplifier configured to provide a second adjustable zero for the control loop of the adaptive power supply; and a third adjustable operation amplifier configured to provide an adjustable gain for the control loop of the adaptive power supply. an amplifier having an input coupled to a radio frequency signal through a digital-to-analog circuit; an adaptive power supply having an output coupled to a bias voltage of the amplifier, wherein the output of the adaptive power supply is configured to have a shape similar to an envelope of the radio frequency signal; and a feedback circuit comprising a sensing circuit and a mapping circuit, wherein the sensing circuit is configured to: sense a current flowing from the adaptive power supply to the amplifier; and sense the bias voltage of the amplifier, and wherein the mapping circuit is configured to generate a control signal for dynamically adjusting parameters of a low pass filter so as to stabilize the adaptive power supply, wherein the adaptive power supply comprises the low pass filter, a pulse width modulation generator, a switching network and an output filter, characterized in that sense a current flowing from the adaptive power supply to the amplifier; and sense the bias voltage of the amplifier, and wherein the mapping circuit is configured to generate a control signal for dynamically adjusting parameters of a low pass filter so as to stabilize the adaptive power supply, wherein the adaptive power supply comprises the low pass filter, a pulse width modulation generator, a switching network and an output filter, the low pass filter comprises: a first adjustable operation amplifier configured to provide a first adjustable zero for a control loop of the adaptive power supply; a second adjustable operation amplifier configured to provide a second adjustable zero for the control loop of the adaptive power supply; and a third adjustable operation amplifier configured to provide an adjustable gain for the control loop of the adaptive power supply. a first adjustable operation amplifier configured to provide a first adjustable zero for a control loop of the adaptive power supply; a second adjustable operation amplifier configured to provide a second adjustable zero for the control loop of the adaptive power supply; and a third adjustable operation amplifier configured to provide an adjustable gain for the control loop of the adaptive power supply.