DESIGN METHOD FOR DIGITAL FILTER AND DIGITAL FILTER DESIGN DEVICE

DESIGN METHOD FOR DIGITAL FILTER AND DIGITAL FILTER DESIGN DEVICE

PROBLEM TO BE SOLVED: To improve the efficiency of the design job in the design method of a digital filter and its device. SOLUTION: A waveform with a desired frequency characteristic H3 (f) is decided from both sets of waveform hose frequency characteristics are H1 (f) and H2 (f) in the steps S30-S...

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1. Verfasser: OSANO YUICHI
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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description PROBLEM TO BE SOLVED: To improve the efficiency of the design job in the design method of a digital filter and its device. SOLUTION: A waveform with a desired frequency characteristic H3 (f) is decided from both sets of waveform hose frequency characteristics are H1 (f) and H2 (f) in the steps S30-S36. Then elements (amplitude, cut-off frequency) of sets of waveform of the H1 (f) and H2 (f) are entered and a time function h3 (t) with respect to the waveform with the H3 (f) is calculated based on time functions h1 (f), h2 (f) corresponding respectively to the H1 (f) and H2 (f) in the step S38. A window function hw (t) is multiplied with the time function h3 (t) in the step S40 and the result of multiplication is sampled to generate a data string h6 (t) for a filter coefficient corresponding to the H3 (f).
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subjects BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
title DESIGN METHOD FOR DIGITAL FILTER AND DIGITAL FILTER DESIGN DEVICE
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