Patent ID: 8378749

Claim:
An amplifier system, comprising: an amplifier having at least a first input port, wherein the amplifier includes a first capacitance associated with the first input port; a first bias circuit, wherein the first bias circuit comprises a series connection of a first charging circuit and a first discharging circuit, wherein a first node between the first charging circuit and the first discharging circuit is connected to the first input port of the amplifier, wherein responsive to a radio frequency (RF) input signal having at least a first predetermined level being received at the first input port, the first charging circuit charges the first capacitance associated with the first input port during a first portion of a cycle of the RF input signal, and discharges the first capacitance associated with the first input port during a second portion of the cycle of the RF input signal, thereby controlling a DC bias voltage level available at the first input port of the amplifier.