Patent ID: 6137354
Filing Date: 2000-10-24
Classification: H03F,H03G

Abstract:
A method for dynamically improving the efficiency of an RF amplifier, the method comprising:amplifying an RF signal through a driver;providing the flow of power to said RF amplifier and amplifying said RF signal through said RF amplifier in response to a high RF output power condition;impeding the flow of power to said RF amplifier and bypassing further amplification of said RF signal through said RF amplifier in response to a low RF output power condition;wherein said power provided to said RF amplifier produces a supply current in said RF amplifier during a high RF output power condition, the method further comprising the steps:producing a signal;producing a supply current tracking signal indicating the present level of said supply current;determining the difference between at least said signal and at least said supply current tracking signal to obtain a gate biasing signal; andvarying said supply current in proportion to said gate biasing signal.