Radio frequency power amplifier

An amplifier, comprising:

• a RF power level detector circuit/a control circuit fed by an RF input signal, for producing a control signal in accordance with a power level of RF input signal, such control signal indicating whether the power level of the RF input signal is within a predetermined range of power levels greater than zero;
• an amplifier section, comprising:
• a field effect transistor having a gate for controlling a flow of carriers between a drain and a source of the field effect transistor;
• and
• a voltage source coupled to the drain;
• a reference potential connected to the source;
• wherein the drain provides an output for the amplifier section;
• and wherein the RF input signal is fed to the gate;
• and
• a bias circuit, connected to a voltage source and fed by the control circuit for producing a fixed bias to the gate to establish a predetermined drain quiescent current (Idq) for the field effect transistor when the control signal indicates the power level of the RF input signal is within the predetermined range of power levels while the bias circuit is connected to the voltage source and to reduce the bias voltage to reduce the predetermined quiescent current when the control signal indicates the power level of the RF input signal is below the predetermined range of power levels while the bias circuit is connected to the voltage source.