Title:
METHOD OF CONSTITUTING A DIGITAL FILTER
Document Type and Number:
WIPO Patent Application WO/1986/001656
Kind Code:
A1
Abstract:
A method of constituting a digital filter which does not form in the circuit a loop that excludes delay elements, which has a low coefficient of sensitivity and a low sensitivity for the internal operation word length. First, a node or closed circuit equation of an analog filter which is to be converted into a digital filter, is subjected to S-Z conversion to convert it into an equation which is mapped on a Z-plane. The digital filter to be found is constituted by using the equation mapped on the Z-plane as an equation which has a delay to give a node voltage or a closed circuit current. The digital filter can also be found by converting the inductance of the analog filter into an equivalent circuit which consists of a resistance and a capacitance having positive and negative values, and by using the node or closed circuit equation of this equivalent circuit.
Inventors:
KOBAYASHI MASAKI (JP)
ITOH YOSHIO (JP)
TAKUMI ICHI (JP)
HAYAHARA ETSURO (JP)
ITOH YOSHIO (JP)
TAKUMI ICHI (JP)
HAYAHARA ETSURO (JP)
Application Number:
PCT/JP1985/000489
Publication Date:
March 13, 1986
Filing Date:
September 02, 1985
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD (JP)
International Classes:
H03H17/04; (IPC1-7): H03H17/04
Other References:
Proceedings of the IEEE, Vol. 55, No. 2, February, 1967, pp 149-171 (Digital Filter Design Techniques in the Frequency Donain)
See also references of EP 0194318A4
See also references of EP 0194318A4
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