Title:
CONVERSION ADAPTOR FOR WAVE DIGITAL FILTER AND BALANCING NETWORK USING WAVE DIGITAL FILTER
Document Type and Number:
WIPO Patent Application WO/1991/003872
Kind Code:
A1
Abstract:
A balancing network of wave digital filter type consisting of three-terminal-pair conversion adaptors (21 to 26) connected in cascade each of which having a capacitor (C) and a resistor (R) as constituent elements to exhibit a filter operation function. Based on the fact that no wave is reflected by a terminal pair other than the two terminal pairs for cascade connection of the conversion adaptors (22, 24, 26) that include the resistor (R), the above terminal pair is excluded and these adaptors are combined with the neighboring conversion adaptors (21, 23, 25) that include the capacitor (C) in order to form a new three-terminal-pair-combined conversion adaptor (41) which realizes a filter function with an operation amount which is smaller than the sum of operation amounts of the three-terminal-pair conversion adaptors (21 to 26).
Inventors:
KAKUISHI MITSUO (JP)
Application Number:
PCT/JP1990/001120
Publication Date:
March 21, 1991
Filing Date:
August 31, 1990
Export Citation:
Assignee:
FUJITSU LTD (JP)
International Classes:
H03H17/02; (IPC1-7): H03H17/02
Foreign References:
| JPS59207721A | 1984-11-24 | |||
| JPS59181813A | 1984-10-16 |
Other References:
Denshi Joho Tsushin Gakkai Ronbunshi '87/3 Vol. J70-A, No. 3, P. 491-499 "Method for synthesis of a digital filter having a low sensitivity in a pass band with use of a T-shaped longitudinal connection".
Denshi Joho Tsushin Gakkai Ronbunshi '86/6 Vol. J69-A, No. 6, P.723-730 "Equivalent conversion and sensitivity of a wave digital filter".
See also references of EP 0440823A4
Denshi Joho Tsushin Gakkai Ronbunshi '86/6 Vol. J69-A, No. 6, P.723-730 "Equivalent conversion and sensitivity of a wave digital filter".
See also references of EP 0440823A4
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