The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1995
Filed:
Aug. 23, 1993
Etsurou Sakamoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed is a cyclic digital filter comprising a feedback loop including a first unit time delay circuit for delaying an input signal by a unit time; a coefficient multiplier for multiplying by a predetermined coefficient the output from the first unit time delay circuit; and an adder for adding the input signal and the result of the multiplication by the coefficient multiplier. The adder performs add and subtract operations involving the input signal and the output signal supplied via the first unit time delay circuit and via the coefficient multiplier. The cyclic digital filter also comprises a second unit time delay circuit interposingly provided between the coefficient multiplier and the adder. In operation, the coefficient of the coefficient multiplier is adjusted to maintain, in the presence of the second unit time delay circuit, the characteristics of the cyclic digital filter in effect when the second unit time delay circuit is absent.