Digital filter device

Details Digital filter device Digital filter device

1981-04-21

1983-12-20

Chin, Gary

Boots, shoes, and leggings

G06F 1534

Patent

active

044221568

ABSTRACT:
Coefficients used for calculating a transfer function are read out from a ROM corresponding to the cutoff frequency of a desired filter. Using the coefficients read out from the ROM, other coefficients are calculated in a coefficient calculating circuit. The filtering operation is performed by a digital filter circuit, using the obtained coefficients together with the coefficients read out from the ROM.

REFERENCES:
patent: 3852531 (1974-12-01), Fretwell et al.
patent: 4031378 (1977-06-01), LeComte
patent: 4066881 (1978-01-01), Houdard
patent: 4121295 (1978-10-01), Witt
patent: 4157457 (1979-06-01), Sakoe et al.
patent: 4158232 (1979-06-01), Koeth et al.
patent: 4255794 (1981-03-01), Nakayama
patent: 4305133 (1981-12-01), Amada et al.

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