Methods and apparatus for controlling a gain state of a wireless receiver operating in an idle mode

A mobile station, comprising:

• a receiver which receives radio frequency (RF) signals through an antenna;
• an amplifier of the receiver which is adapted to amplify the RF signals;
• a level detector which is adapted to detect a signal level of the RF signals;
• a gain controller which is adapted to provide a gain control state value in response to the signal level;
• and
• a processor which is adapted to:
• read a gain control state value from the gain controller during a first wake-up period of the receiver;
• store the gain control state value in memory;
• provide a selection signal for selecting the stored gain control state value from the memory for the receiver during a warm-up period of a second wake-up period following the first wake-up period;
• and
• provide, after the warm-up period of the second wake-up period, a gain control state value from the gain controller to the receiver based on a signal level of a currently received signal in the receiver.

A circuit for a wireless receiver, comprising:

• a low noise amplifier (LNA) which is adapted to amplify radio frequency (RF) signals in the wireless receiver;
• a level detector which is adapted to detect a signal level of the RF signals;
• a gain controller which is adapted to provide a gain control state value in response to the signal level;
• and
• a processor which is adapted to read a gain control state value from the gain controller during a first wake-up period of the wireless receiver;
• store the gain control state value in memory;
• provide a selection signal for selecting the stored gain control state value from the memory during a warm-up period of a second wake-up period following the first wake-up period;
• and provide, after the warm-up period of the second wake-up period, a gain control state value from the gain controller to the wireless receiver based on a signal level of a currently received signal in the wireless receiver.