Programmable digital filter

Details Programmable digital filter Programmable digital filter

1989-11-21

1992-04-07

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1531

Patent

active

051034166

ABSTRACT:
The digital filter includes a plurality of parallel adders, each whereof has a first input, a second input and an output; the parallel output of each adder is connected to the first input of the successive adder across a respective delay element. The second input of each adder is connected in parallel to the output of one of a plurality of memory banks, each whereof comprises a plurality of addressable memory cells, the addressing inputs whereof can be driven by a sampled digital signal to be filtered, and the memory cells of each bank contain a digital value which is equal to the product of a preset coefficient by the address of the cell itself.

REFERENCES:
patent: 3777130 (1973-12-01), Croisier et al
patent: 4423488 (1983-12-01), Campbell
patent: 4450533 (1984-05-01), Petit et al.
patent: 4701956 (1987-10-01), Katoh
patent: 4709343 (1987-11-01), Van Cang
patent: 4766563 (1988-08-01), Fujimoto
patent: 4794555 (1988-12-01), Kojima et al.
patent: 4811262 (1989-03-01), White
Schroder, "High Word-Rate Digital Filters with Programmable Table Look-up," IEEE Trans. on Circuits & Systems, vol. CAS-24, No. 5, May 1977, pp. 277-279.

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