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

An electrical circuit, comprising:

• a processor;
• memory coupled to the processor;
• a communication subsystem coupled to the processor;
• a level detector configured to detect a signal level of a signal received in the communication subsystem;
• a state controller configured to provide one of a plurality of state values in response to the detected signal level from the level detector;
• the processor being configured to:
• set the communication subsystem to a first wake-up mode of operation;
• read a state value from the state controller during the first wake-up mode of operation and store the state value in the memory;
• set the communication subsystem to a sleep mode of operation after the first wake-up mode of operation;
• set the communication subsystem to a second wake-up mode of operation after the sleep mode of operation;
• and
• read from the memory the stored state value, and set the communication subsystem to operate based on the read state value during a warm-up period of the second wake-up mode of operation.

A communication device, comprising:

• a processor;
• memory coupled to the processor;
• a communication subsystem coupled to the processor;
• a level detector configured to detect a signal level of a signal received in the communication subsystem;
• a state controller configured to provide one of a plurality of state values in response to the detected signal level from the level detector;
• the processor being configured to:
• set the communication subsystem to a first wake-up mode of operation;
• read a state value from the state controller during the first wake-up mode of operation and store the state value in the memory;
• set the communication subsystem to a sleep mode of operation after the first wake-up mode of operation;
• set the communication subsystem to a second wake-up mode of operation after the sleep mode of operation;
• and
• read from the memory the stored state value, and set the communication subsystem to operate based on the read state value during a warm-up period of the second wake-up mode of operation.