Digital filter having independent damping and frequency paramete

Details Digital filter having independent damping and frequency paramete Digital filter having independent damping and frequency paramete

1992-12-14

1994-10-11

Mai, Tan V.

Boots, shoes, and leggings

G06F 1531

Patent

active

053553292

ABSTRACT:
A filter capable of having its damping and frequency parameters independently varied. The filter can be represented in either a digital or an analog computation network. The network comprises four multipliers for multiplying by a frequency term twice and a damping factor twice. In addition, the network comprises two unit delay blocks for temporarily storing previous signal input values for zeros or output values for poles. These stored values are used in computing subsequent outputs. The multipliers are configured with adders and subtractors to compute a next output value as a combination of a current input, a weight -2+2df+f.sup.2 --wd.sup.2 f.sup.2 times the most recent saved value and a weight 1-2df+wd.sup.2 f.sup.2 times the previous saved value. Moreover, unity gain at DC can be achieved.

REFERENCES:
patent: 4337518 (1982-06-01), Ohnishi et al.
patent: 4356559 (1982-10-01), Candy et al.
patent: 5170369 (1992-12-01), Rossum

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