DC power savings in a mobile communication device can be achieved by
dynamically adjusting the biasing for a receiver based on the
communication link quality. The output signal levels of at least one low
noise amplifier (LNA) are monitored to identify the DC operating
conditions for the LNA. Closed loop control of the DC biasing is adjusted
based on a comparison between the monitored DC operating conditions and a
reference signal. The output of the LNA is also coupled to a radio
receiver section that is configured (e.g., SW or HW) to evaluate the link
quality based on various criteria such as inter-modulation distortion,
noise, interference, fading, etc. The reference signal that is used to
control the DC biasing of the LNA is adjusted (periodically,
continuously, or on demand) in response to the evaluated link quality.
The dynamic biasing yields acceptable signal reception with low DC power
consumption.