| 摘要 |
Methods and systems for calibrating a frequency of a circuit are disclosed herein and may comprise dividing a feedback frequency of an output frequency signal to generate a divided frequency signal. Open loop calibration may be performed based on a binary search of the generated divided frequency signal to generate a coarse calibrated frequency signal. Subsequently, a closed loop calibration may be performed on the coarse calibrated frequency signal to generate a fine calibrated frequency signal. A binary code may be generated utilizing the binary search of the generated divided frequency signal. Capacitance within the circuit may be adjusted based on the generated binary code. A control voltage for the circuit may be measured by closing a phase locked loop (PLL) with the circuit. If the measured control voltage is not within a determined voltage range, a calibration flag signal may be generated.
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