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PHASE SHIFT PRECISION CALIBRATION CIRCUITRY, VECTOR SUM PHASE SHIFTER, AND WIRELESS COMMUNICATION DEVICE
PHASE SHIFT PRECISION CALIBRATION CIRCUITRY, VECTOR SUM PHASE SHIFTER, AND WIRELESS COMMUNICATION DEVICE
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机译:移相精度校准电路,矢量和相移器以及无线通信设备
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摘要
There are provided: a table memory to store a relation between a control code and gains of variable gain amplifiers; a gain controller to apply the gains to the variable gain amplifiers; an amplitude phase detector to detect amplitude and a phase from an output signal of the vector sum phase shifter; an amplitude phase recorder to record, when the gains are applied by the gain controller, a combination of a control code corresponding to said gains and the amplitude and the phase detected by the detector; and a table calibrator to find a phase shift characteristic of a vector summed part from records of the amplitude phase recorder and calibrate the relation between a control code and gains recorded in the table memory by using the phase shift characteristic.
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