Digital filter processing device

Details Digital filter processing device Digital filter processing device

1990-04-20

1991-07-02

Shaw, Dale M.

Boots, shoes, and leggings

G06F 1531

Patent

active

050291211

ABSTRACT:
A digital filter processing device includes at least a plurality of multipliers each for multiplying data signal by coefficient data, and an adder for adding together the multiplication results derived from the multipliers. The digital filter processing device further includes coefficient registers each for storing the coefficient data as is shifted so that a first effective digit of the coefficient data lies at the left end, shift-quantity registers provided in connection with the coefficient registers, and each for storing a quantity of shift equal to the shift quantity of the coefficient data, and barrel shifters each for shifting the digits of an output data from each of the multipliers by the shift quantity stored in each of the shift-quantity registers, in the opposite direction to that of the shift in each of the coefficient registers. The digital filter processing device may further include a second shift-quantity register for storing a second quantity of shift, and a second barrel shifter for shifting the digits of the output data of the adder by the second shift quantity.

REFERENCES:
patent: 4701956 (1987-10-01), Katoh
patent: 4939684 (1990-07-01), Gehrig et al.

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