| 摘要 |
PURPOSE: An IQ(In-phase Quadrature) mismatch correction circuit consecutively revises the IQ phase mismatch and IQ gain mismatch of the frequency dependence about the digital base band signal on I phase and Q by using the IQ phase mismatch correction circuit and IQ gain mismatch correction circuit. CONSTITUTION: A first digital-filter(11) is proceed the digital filter transaction more than the first about I phase input signal of the time domain. A second digital-fillter(12) is proceed the digital filter transaction more than the first about Q phase input signal of the time domain. Control circuits(19, 20) more than 2 supply the control variable more than 2 for drawing in something coefficient more than 2 of each transfer function of the first and the second digital-fillter as to the time domain to the respective first and the second digital-fillter.
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