| 摘要 |
PROBLEM TO BE SOLVED: To detect only the components of system high frequency, and remove DC components and high frequency components completely, and flatten the inclination of the amplitude-frequency property in the system frequency, by setting the fundamental transmission function of a digital filter so that it can be expressed in a specified formula. SOLUTION: The fundamental transmission function H4(Z) of a digital filter is set so that it can be expressed in a formula, where, (h) is sampling frequency/ system rated frequency, and (p) is a designated factor. Hereby, the degree of the digital filter becomes the eleventh, so this filter can detect only the components of system frequency, and can remove the DC components and high frequency components completely. Moreover, this can flatten the inclination of the amplitude-frequency property in the system frequency. setting the value of designated factor (p). |
