| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a reference signal generator for constantly estimating a level (DAC value) of a precise control voltage signal. <P>SOLUTION: A control section 10 starts clocking on activation (S102), and sets a weighting factor W from the relation table of preset timing (elapsed time after the activation) and weighting factors (S105) when the calculation timing of a self-propelled DAC value is reached (S104:Yes) by performing clocking (S103) and detecting the calculation timing of the self-propelled DAC value. In this case, the longer the elapsed time is from the activation, the larger the value of the weighting factor is set, thus performing weighting for reducing an influence on this estimation value by a past DAC value for a period when the variation of the DAC value is large and the elapsed time is short from the activation. Contrarily, weighting for increasing an influence on this estimation value by the past DAC value is performed in a period when the elapsed time is sufficiently long and the DAC value is stable. <P>COPYRIGHT: (C)2010,JPO&INPIT |
