Feedback biasing for cascode amplifiers

PURPOSE: A power transmission system using feedback biasing for a cascade amplifier is provided to reduce voltage stress of a common gate amplifier of a first cascade amplifier stage, by making the voltage of the common gate amplifier follow an output voltage of the power transmission system. CONSTITUTION: A driver amplifier stage(102) receives system input like a baseband signal or an RF signal from an input port(101). The driver amplifier stage generates first stage output to drive a power amplifier stage(103). The power amplifier stage provides an amplified output signal to an output port(105). A feedback network(104) provides a common gate parasitic signal of the power amplifier stage to a common gate of the driver amplifier stage as a feedback signal.