| 摘要 |
PROBLEM TO BE SOLVED: To stabilize and minimize distortion of output by suspending search operation for a control voltage and eliminating the fluctuation of the distortion by fixing the control voltage around the minimum points as the optimum control voltage when a plurality of minimum points of a detection voltage in feed forward automatic control are present. SOLUTION: A feed forward circuit comprises: fixing the control voltage after convergence when the difference between the past detection voltage (pM) and the present detection voltage (nM) is low by referring to history information on the past detection voltage (pM) and the present detection voltage (nM) when the control voltage at the optimum point of the detection voltage obtained in the process of the feed forward automatic control minimizing a distortion component comes to a convergence (stable) state; sending the control voltage after the convergence to a vector adjuster; and continuously sending the stable control voltage to the vector adjuster. COPYRIGHT: (C)2004,JPO&NCIPI
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