| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital filter suitable for integration. SOLUTION: The digital filter receiving a digital input signal of a plurality of bits every predetermined period and outputting a digital output signal obtained by filtering the digital input signal depending on the predetermined filter factor and filter order comprises a section for delaying the digital input signal and/or the digital output signal sequentially every period depending on the filter order, a filter factor processing section for down shifting the digital input signal and the delayed signal by an amount of the absolute value of an index indicated by the digit of "1" out of the decimal part of the filter factor becoming a finite decimal when binary notation is carried out, and a section for summing the signals processed at the filter factor processing section and outputting the results of summation as the digital output signal. COPYRIGHT: (C)2006,JPO&NCIPI
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