Low frequency digital notch filter

Details Low frequency digital notch filter Low frequency digital notch filter

1986-08-08

1990-08-07

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1531

Patent

active

049473603

ABSTRACT:
A low frequency digital notch filter comprising two sub-filters - an all-pass-network filter (1) and a T-section filter (3) with a feedback connection from the T-filter to an input node (31), and feed forward connection from this input node to a terminal output node (33). The all-pass-network filter (1) has a transform function:

REFERENCES:
patent: 3967102 (1976-06-01), McCown
patent: 4215415 (1980-07-01), Kamemasa et al.
patent: 4524422 (1985-06-01), Kasuga
Abu-El-Haija et al., "A Structure for Digital Notch Filters", IEEE Trans. on Acoustics, Speech and Signal Proc., vol. ASSP-27 HZ, pp. 193-195, Apr. 1979.
IEEE Proceeding, vol. 130, Pt. G., No. 6, Dec. 1983, Valenzuela et al., pp. 225-234--"Digital Signal . . . Decimation".
IEEE Transactions on Acoustics, Speech and Ssignal Processing, vol. ASSP-22, No. 1, Feb. 1974, pp. 10-15, N.Y., U.S.; J. A. Cadzow: "Digital Notch . . . Procedure" etc.
1982 International Symposium on Circuits and Systems, Rome, May 10th-12th, 1982, vol. 2, pp. 260-263, IEEE; AG Constantinides et al: "A Class of Efficient . . . Transmultiplexing" etc.
IEEE Transactions on Communications, vol. COM-22, No. 7, Jul. 1974, pp. 964-970, New York, U.S.; K. Hirano et al: "Design of Digital . . . " . . . etc.

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