| 摘要 |
PURPOSE:To improve the accuracy of an automatic output controller and to lower power consumption by accelerating automatic output control at the time of rising burst signals by weighting coefficient control and further holding an output signal level without the degradation of modulation accuracy at stable time. CONSTITUTION:In first and second weighting means 43 and 45, for burst input to an output control mechanism 41, the weighting amount of the means 43 is made large and the weighting amount of the means 45 is made small at the time of starting burst. Then, as the time elapses, the weighting amount of the means 43 is made smaller and the weighting amount of the means 45 is made larger. In such a manner, an average value is calculated while following up input signals at a high speed in a calculation means 46 at the time of starting the burst, a control value from a control value generation means 47 is sent to the output control mechanism 41 corresponding to the value and the output signal level is converged to a target value at a high speed. On the other hand, when the time elapses after the start of the burst, even for the noise fluctuation of the input signals for which the time series of signals in the past are dominant in average value calculation, an output control operation is stabilized. |
