| 摘要 |
PURPOSE:To provide a filter with adaptability of response by using a transversal filter so that even when an input signal varies abruptly, the rate of the variation is estimated. CONSTITUTION:A digital integrator 4 integrates an input signal X to obtain a digital signal W. A load on a transversal filter 5 is determined by an external input signal H. A minimum error forecasting device 6 inputs the difference signal E between the input signal X and an output signal Y of the filter 5, and then adjusts the signal H for the coefficient value of the filter 5 so that the square of the signal E is minimized a certain time later, thereby feeding it back to the filter 5. Since the coefficient of the filter 5 is adjusted so that the signal E is nearly 0 the certain time later and the signal W is obtained by integrating the signal X, the filter 5 is a filter for differentiating the signal W eventually. For this purpose, the input signal X is inputted to a transversal filter 7 having the same coefficient, outputting the differential signal V of the signal X. |
