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:
Dec. 08, 1992
Filed:
Jun. 03, 1991
Shinji Hattori, Higashi-Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A digital decimation filter including: a shift register array having N shift registers connected to each other is series for storing an input data at every input sampling interval, a switch circuit for selecting signals from output signals respectively outputted from the N shift registers, a conversion circuit for linearly converting a signal being inputted to the shift register array and the signals selected by the switch circuit into a single signal, and an accumulative addition circuit for integrating the single signal repeatedly a predetermined number of times. The switch circuit selects M signals S.sub.n, S.sub.2n, . . . , S.sub.Mn from the output signals S.sub.1, S.sub.2, . . . , S.sub.n of the N shift registers when a decimation ratio indicative of a ratio of an input sampling frequency to an output sampling frequency is n, where N, M and n are integers satisfying an inequality N.gtoreq.M.times.n.