Patent ID: 7262657

Claim:
A method for controlling the biasing level of one or more amplifiers comprising: providing an input signal having a power level to a first amplifier stage and a first biasing cell, the first amplifier stage configured to amplify the input signal; responsive to the power level of the input signal, generating a first biasing current within the first bias cell utilizing the first bias cell; providing the first biasing current to the first amplifier stage wherein the magnitude of the first biasing current is proportional to the magnitude of the input signal providing the amplified input signal to a second amplifier stage configured to receive and amplify the amplified input signal; generating a cancellation current to reduce current consumption; mirroring the first bias current to a second biasing cell, the second biasing cell configured to generate a second bias current having a magnitude that is determined by cancellation current and the magnitude of the first bias current, the magnitude of the input signal, or both; and providing the second bias current to the second amplifier stage.