Programmable multifrequency digital tone receiver

Details Programmable multifrequency digital tone receiver Programmable multifrequency digital tone receiver

1985-10-02

1987-11-24

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 738, G06F 1531

Patent

active

047093447

ABSTRACT:
A circuit arrangement for filtering input signals carried on PCM channels. The circuit arrangement includes a plurality of digital signal processors arranged in a parallel manner each having a set of filtering operations, a multiplexer for distributing the input signals to each digital signal processor, a processor for analyzing frequency characteristics output by the digital signal processors and an addressing PROM for controlling a correspondence between the PCM channels and the filtering operations in each of the digital signal processors.

REFERENCES:
patent: Re29460 (1977-10-01), Mills
patent: 3824471 (1974-07-01), Mills
patent: 3863030 (1975-01-01), Mills
patent: 4221934 (1980-09-01), Schiff
patent: 4354248 (1984-10-01), Conger et al.
patent: 4393456 (1983-07-01), Marshall
patent: 4394762 (1983-07-01), Nabeshima

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