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Accurate, low-power power detector circuits and related methods using programmable reference circuitry
Accurate, low-power power detector circuits and related methods using programmable reference circuitry
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机译:使用可编程参考电路的精确,低功率功率检测器电路及相关方法
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摘要
Embodiments of power detector circuits and related methods to compensate for undesired DC offsets generated within power detector circuits are disclosed. Input signals having input frequencies are received and converted to a magnitude signal, and reference signals are also generated. The magnitude signal may include a DC component proportional to a power of the input signal along with undesired DC offsets. The reference signal may include a DC component proportional to a power of at least one input reference signal along with undesired DC offsets. To compensate for errors introduced by the DC offsets, a programmable digital input signal is determined in a calibration mode and then applied to reference circuitry in a normal mode to compensate for the DC offsets. For the calibration mode, a difference between the magnitude signal and the reference signal is compared to a threshold value to generate a power detection output signal.
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