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:
Sep. 01, 2015
Filed:
Jul. 17, 2012
Yusuke Edo, Kanagawa, JP;
Seiji Kamada, Kanagawa, JP;
Yusuke Edo, Kanagawa, JP;
Seiji Kamada, Kanagawa, JP;
RENESAS ELECTRONICS CORPORATION, Kawasaki-Shi, Kanagawa, JP;
Abstract
To variably change the filter characteristic of a decimation filter in accordance with a sampling rate. A decimation filterin a semiconductor devicesequentially inputs a signal sampled at a predetermined sampling rate f, and calculates, for each input signal that is input within a predetermined period (a period for M+2N), a filter coefficient Cj for performing predetermined filtering processing in response to a trigger signal TR continuously applied, and furthermore sequentially multiplies the input signal by the calculated filter coefficient, accumulates a multiplication value within the predetermined period, and sequentially outputs the result. The predetermined period is made variable in accordance with a time interval at which the trigger signal is applied.