DIGITAL FILTER, INTEGRATED CIRCUIT AND DIGITAL FILTER SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain a digital filter where an input data delay section and an arithmetic section can be operated by using operating timing signals whose periods differ from each other resulting in the facilitation of extension of a degree of parallelism thereby attaining high speed pressing. SOLUTION: The digital filter is provided with input data delay sections 1-3 that delay digital data Din received in time series and with arithmetic sections 4-13 that apply an arithmetic operation to digital data a1-c1 delayed by the input data delay sections 1-3, and the filter processing is conducted by applying the arithmetic operation to the digital data a1-c1 by means of the arithmetic sections 4-13. A 1st operating timing signal CLK whose period is equal to that of the received digital data Din is given to the input data delay sections 1-3, and the 1st operating timing signal CLK and a 2nd operating timing signal LD whose period is longer than that of the 1st operating timing signal CLK are given to the arithmetic sections 4-13.