摘要 |
<p>PURPOSE:To permit the stabilization of a feedback system and obtain the high speed responsiveness by handling the value taken in at the preceding time, as input signal, when the polarity change is frequent and taking in the input signal at that time if the polarity change does not occur. CONSTITUTION:A limitter 3 outputs the signal which varies according to the signal input through a filter 1 and an A/D converter 2. When the direction of variation of the input signal input into the limitter 3 changes, the equal value to the output value in the preceding time is outputted. Further, when the output value of a vector signal generator 4 continues to have an equal value, the signal which represents the following rate is outputted from a following rate setting device 6 according to the output of a vector counter 5 which performs counting-up at each sampling timing, and the signal obtained after the calculation on the basis of the output is outputted from a signal processing part 7. Therefore, when the state in which the direction of variation of the input signal input into the limitter 3 continues, the value closer to the level of the input signal is outputted as the continuation time of the state is longer.</p> |