Closed loop bank selection for temperature compensation in wireless systems

摘要

The disclosure is directed to compensating for frequency drift in a voltage-controlled oscillator (VCO). Example methods and systems are described which may detect a signal edge associated with a transceiver, and determine whether one or more lock quality signals indicate that the VCO frequency is outside of an specified range, indicating an unacceptable amount of frequency drift. A frequency tuning setting of the VCO may be adjusted based on the one or more lock quality signals, and a determination may be made whether or not the one or more lock quality signals indicate that the VCO frequency has returned to the specified range. The adjustment of the frequency tuning setting of the VCO may be repeated until the VCO frequency returns to the specified range.

主权项

1. A method for compensating for frequency drift of a voltage controlled oscillator (VCO) in a transceiver, the method comprising:
detecting a signal edge associated with the transceiver; determining that one or more lock quality signals indicate that the VCO frequency is outside of a specified range; adjusting a frequency tuning setting of the VCO based at least in part on the one or more lock quality signals; and determining that the one or more lock quality signals subsequently indicate that the VCO frequency has returned to the specified range, wherein a set of allowable frequency tuning settings includes one or more frequency tuning settings associated with a region of frequency overlap, and wherein adjusting the frequency tuning setting further comprises:
determining that a current value of the frequency tuning setting is associated with the region of frequency overlap; andin response to determining that the current value of the frequency tuning setting is associated with the region of frequency overlap, triggering an open-loop calibration operation.