Patent ID: 8744393

Claim:
An apparatus for amplifying and filtering a signal in a baseband portion of a receiver comprising: two or more variable gain amplifier (VGA) stages and a filter stage, the filter stage being located between the two or more VGA stages; and a Gain Control Unit for varying as gain of the two or more VGA stages, the Gain Control Unit configured to: determine an estimate of power for a desired component of the signal based at least in part on a predicted power of the desired component after the signal is amplified and altered and a measure of power of the desired component after the signal is amplified and filtered, determine an estimate of power for an undesired component of die signal based at least in part on a predicted power of the undesired component after the signal is amplified and filtered and a measure of power of the undesired component after the signal is amplified and filtered, determine a gain assignment based at least in part on the estimate of power for the desired component and the estimate of power for the undesired component, and distribute the gain between the two or more VGA stages based at least part upon the gain assignment.