| 摘要 |
PCT No. PCT/EP87/00484 Sec. 371 Date Apr. 7, 1989 Sec. 102(e) Date Apr. 7, 1989 PCT Filed Aug. 26, 1987 PCT Pub. No. WO88/02954 PCT Pub. Date Apr. 21, 1988.Circuitry is disclosed for converting an input measurement signal VR(i), which is disturbed at least occasionally by a disturbance function, into an output, undisturbed signal VR(o) by means of a first digital adaptive filter having variable filter parameters. A control circuit is provided to change to parameters of the second adaptive filter to improve the ability of the system to filter out the disturbance signal. The apparatus includes a series circuit formed by a high pass filter and a second digital adaptive filter, coupled to receive the input signal VR(i). The control circuit switches the second adaptive filter to the adaptation mode, for determining the filter parameters necessary for suppression of the disturbance function n, when essentially only the disturbance signal reaches the second adaptive filter. Thereafter, the filter parameters of the second adaptive filter are transferred to the first adaptive filter to improve the performance of the first adaptive filter.
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