Digital filter system having filters synchronized by the same cl

Details Digital filter system having filters synchronized by the same cl Digital filter system having filters synchronized by the same cl

1977-12-19

1979-04-10

Malzahn, David H.

Boots, shoes, and leggings

G06F 1534

Patent

active

041492587

ABSTRACT:
A digital filter system comprising a plurality of digital filters having respective counters operated by the same clock signal, at least one of these digital filters including an operation control section having a counter to count the clock signal and be cleared with a clear signal and a circuit to produce a control signal according to the content of the aforesaid counter, an ROM to provide predetermined coefficients according to the output of the arithmetic control section, an arithmetic section to carry out predetermined arithmetic operations with the above predetermined coefficients under the control of the control signal received from the arithmetic control section, a delay memory section, a switching device controlled for switching to execute the arithmetic operations under the control of the control signal received at the time of execution of the operations, and a circuit to produce a synchronizing signal at the time of the end of the operations in the aforesaid filter, said synchronizing signal being supplied to the clear terminals of the counters of all the other digital filters to effect synchronization of all the digital filters.

REFERENCES:
patent: 3706076 (1972-12-01), Schuster
patent: 3961167 (1976-06-01), Mills
patent: 3988607 (1976-10-01), Eggermont et al.
patent: 3997773 (1976-12-01), Essen et al.
Leon et al. "A Laboratory for Digital Filter Instructions", IEEE Trans. on Circuits and Systems vol. CAS-23, No. 4, pp. 217-218 Apr. 1976.

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