Cascaded arrangement of lower order filters and method of...

Details Cascaded arrangement of lower order filters and method of... Cascaded arrangement of lower order filters and method of...

2005-10-11

2005-10-11

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S138000

Reexamination Certificate

active

06954119

ABSTRACT:
A passive filter arrangement and a method of providing such a filter is described. The frequency response of the filter arrangement is substantially the same as the frequency response of a first filter of an order having a first value, the frequency response of the first filter being representable by a first set of one or more poles and/or one or more zeros. Descriptions of a plurality of second filters are generated, each second filter having an order lower than the order of the first value, each second filter having a frequency response representable by a one or more poles and/or one or more zeros, the one or more poles and/or one or more zeros of each lower order filter being a subset of the first set. The lower order filters are cascaded.

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A. Zverev, Handbook of Filter Synthesis 1967, Wiley, pp. 44-50 and 73.
N Sevastopoulos: “How to Design High Order Filtes with Stopband Notches Using the LTC1562 Quad Operational Filter (Part 1)” Linear Technology Magazine, 'Online! May 1, 1998, pp. 26-29, XP002201176.
K Kosbar: “Cascade Forms” 'Online! XP002201177, Nov. 1977.

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