| 摘要 |
A radio circuit may be driven by a high frequency oscillator such as a crystal oscillator that may have sleep and wake time intervals. The sleep time interval length may be adjusted. A low frequency oscillator or low power oscillator (LPO) that may experience frequency drift may regulate the sleep and/or wake time intervals. The frequency drift may be detected based on two or more LPO calibrations and/or one or more clock adjustments. The LPO frequency drift may be detected based on an LPO frequency sampled after a first LPO calibration and a corresponding LPO clock adjustment, a second LPO frequency sampled after a second LPO calibration and a time interval between the two frequency samples. The LPO may be calibrated based on the HFCXO output. Sleep time intervals may be adjusted by adding and/or subtracting a time interval to an expected time to wake the radio circuit.
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