Digital low-pass filter

Details Digital low-pass filter Digital low-pass filter

2007-11-15

2009-12-22

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07636747

ABSTRACT:
A digital low-pass filter includes: a first subtracter that subtracts a first feedback term from an input; a first multiplier that multiplies an first subtracter output by a constant k1; a first delay unit that delays an input by a predetermined sampling time; a first adder that supplies, to the first delay unit, the input obtained by adding an first multiplier output to an first delay unit output; a second subtracter that subtracts the first feedback term from an first adder output; a second multiplier that multiplies an second subtracter output by a constant k2; a second delay unit that outputs, as the first feedback term, a signal obtained by delaying an input by a predetermined sampling time; and a second adder that supplies, to the second delay unit, a signal obtained by adding an second multiplier output to the second delay unit output.

REFERENCES:
patent: 5420892 (1995-05-01), Okamoto
patent: 5440503 (1995-08-01), Maruyama
patent: 5712874 (1998-01-01), Okamoto
patent: 7346639 (2008-03-01), Pilgram
patent: 02-113712 (1990-04-01), None
patent: 03-124110 (1991-05-01), None
patent: 2000-285360 (2000-10-01), None

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