| 摘要 |
A method for realizing a digital filter in an electronic system. The method includes first determining the specific number of coefficients to be calculated for a design filter and calculating the value of some of the coefficients for the design filter, typically all but one. Next, a reference filter is selected having the same number of coefficients as the design filter and each coefficient of the reference filter is calculated. With the reference filter's coefficients, the method concludes by determining the value of the remaining coefficients of the design filter that were previously not calculated. The determination is based upon an arithmetic comparison to the coefficients of the reference filter. The system and method improve second-order filter response for certain filters implemented with a direct-form topology.
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