Apparatus for determining when an automatic gain control circuit has settled

A method comprising:

• sending a settling indicator from a first circuit to a demodulator circuit of a receiver, the settling indicator having a first value to indicate that an automatic gain control (AGC) circuit of the receiver is not settled;
• determining that an AGC gain value change does not exceed a threshold level during a settling window;
• and
• thereafter sending the settling indicator to the demodulator circuit having a second value to indicate that the AGC circuit has settled.

An apparatus comprising:

• a radio frequency (RF) front end circuit to receive and process a RF signal, the RF front end circuit having a first controllable gain;
• a downconverter to downconvert the RF signal to a second frequency signal;
• a programmable amplifier coupled to the downconverter to amplify the second frequency signal, the programmable amplifier having a second controllable gain;
• a digitizer to digitize the second frequency signal to a digitized signal;
• a demodulator to demodulate the digitized signal;
• and
• a controller to dynamically update at least one of the first controllable gain or the second controllable gain during a preamble of a communication, wherein the controller is to prevent operation of the demodulator until the dynamic update is at least substantially completed.